Abstract

The invention relates to an enamel composition for a glass-ceramic article, comprising glass and talc. According to a second aspect, the invention relates to a method for producing said composition, comprising mixing a frit of glass and talc, and optional attrition of the mixture obtained. The invention also relates to a glass-ceramic article comprising at least one substrate, such as a glass-ceramic plate, at least partly coated with an enamel composition according to the invention. Finally, the invention also relates to a method for producing said glass-ceramic article, comprising: providing a glass-ceramic substrate; printing an enamel composition according to the invention thereon; and ceramising the assembly of the substrate and the enamel.

IPC Classes  ?

• C03C 8/14 - Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill additions
• C03C 17/00 - Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating

Goods & Services

Hot plates (hobs), glass plates (kitchen parts); built-in hot plates; electric cooktops; gas cooktops; hot plates (hobs) with integrated hoods; glass-ceramic plates sold as parts of cooking hobs; glass-ceramic hobs without connection to the worktop sold as cooker units; glass-ceramic hot plates (hobs) seamlessly integrated into the worktop sold as a worktop; electric glass-ceramic cooktops; glass-ceramic plates sold in the nature of elements of ovens; ovens, electric ovens; cooking apparatus; cookers (cooking stoves); electric cookers; gas cooking stoves; induction cookers; glass-ceramic heating apparatus; extractor hoods; exhaust hoods; ventilation hoods; ventilation hoods; cooktops. Furniture, namely, furniture for kitchens; worktops; worktops as furniture; worktops for use with sinks; storage furniture; built-in furniture. Chimneys and chimney plates of glass-ceramic materials; heat-resistant glass-ceramic cooking utensils; unworked and semi-worked ceramic glass, except building glass; glass-ceramic cooking utensils for hot plates and for ovens; adjustable hot plates (hobs); non-electric hot plates (hobs).

Goods & Services

Hot plates being electric hobs; glass plates sold as parts of stoves in the nature of kitchen parts; built-in hot plates; electric cooktops; gas cooktops; hot plates being electric hobs with integrated hoods; glass-ceramic plates sold as parts of electric cooking hobs; glass-ceramic electric hobs without connection to the worktop sold as cooker units; glass-ceramic hot plates, being electric hobs seamlessly integrated into a worktop; electric glass-ceramic cooktops; glass-ceramic plates sold as parts of ovens; cooking ovens; electric cooking ovens; cooking apparatus, namely, cooking ovens; cookers being cooking stoves; electric egg cookers; gas cooking stoves; induction cookers; glass-ceramic heating apparatus in the nature of heating elements; extractor hoods for kitchens; exhaust hoods for kitchens; ventilation hoods; cooktops Furniture, namely, furniture for kitchens; worktops; worktops as furniture; worktops for use with sinks; storage furniture; built-in furniture Chimneys and chimney plates of glass-ceramic materials being stove burner covers; heat-resistant glass-ceramic cooking utensils, namely, grill covers; unworked and semi-worked ceramic glass, except building glass; glass-ceramic cooking utensils for hot plates and for ovens, namely, grill covers

Abstract

223222222523222255 with the exception of unavoidable traces. It also relates to an article, consisting at least in part of a glass-ceramic, chosen in particular from a cooking plate and a glazing. It also relates to a lithium aluminosilicate glass, precursor of the glass-ceramic, and the process for producing the article.

IPC Classes  ?

• C03C 3/087 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 10/14 - Silica crystalline phase, e.g. stuffed quartz, cristobalite

Goods & Services

Glass-ceramic cooking hobs sold as cooktop elements; induction plates; ovens, elements for ovens, heating apparatus of glass-ceramic materials. Flameproof glass-ceramic cooking utensils, glass-ceramic cooking utensils for cooktops and for ovens; unworked or semi-worked ceramic glass.

Abstract

22323252222222322O - (BaO + CaO + SrO + CuO) < 6.4%. The invention also provides an article constituted at least in part of an aluminoborosilicate glass, the article being selected from glazing and a cooktop for associating with induction heater means with infrared sensors.

IPC Classes  ?

• C03C 3/093 - Glass compositions containing silica with 40% to 90% silica by weight containing boron containing aluminium containing zinc or zirconium
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• H05B 6/12 - Cooking devices

Goods & Services

Electric glass-ceramic hobs sold as cooktop elements; Induction plates as electromagnetic induction cookers; Cooking ovens, heating elements for ovens; Heating apparatus, namely, heating elements, electromagnetic induction cookers, induction stoves, induction ovens of glass-ceramic materials Glass-ceramic cooking utensils for cooktops and for ovens, namely, pots and pans for induction; Unworked or semi-worked ceramic glass except building glass

Abstract

22322222252222O < 0.9; • optionally up to 2% of at least one fining agent; and • optionally up to 2% of at least one coloring agent.

IPC Classes  ?

• C03C 3/087 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03C 4/02 - Compositions for glass with special properties for coloured glass
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition

Goods & Services

Ceramic cooking plates sold as parts of hobs; Induction cookers; Ovens, Oven elements, Heating apparatus of glass ceramic. Ceramic flame arrester goods, ceramic goods for cooking plates and ovens; Unworked and semi-worked ceramic glass.

Abstract

22322222225232222233.

IPC Classes  ?

• C03C 3/085 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
• C03C 3/087 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03C 10/12 - Lithium aluminosilicate, e.g. spodumene, eucryptite

Abstract

The present application provides transparent glass-ceramics of β-quartz of composition containing a small content of lithium, articles constituted at least in part of said glass-ceramics, glasses precursors of said glass-ceramics, and also a method of preparing said articles. Said glass-ceramics have a composition, free of arsenic oxide and antimony oxide, except for inevitable traces, expressed as percentages by weight of oxides, containing: 62% to 68% of SiO2; 17% to 21% of AI2O3; 1% to < 2% of Li20; 1% to 4% of MgO; 1% to 6% of ZnO; 0 to 4% of BaO; 0 to 4% of SrO; 0 to 1% of CaO; 1% to 5% of ΤiΟ2; 0 to 2% of ZrO2; 0 to 1% of Na2O; 0 to 1% of K2O; with Na2O + K2O + BaO + SrO + CaO <6%; optionally up to 2% of at least one fining agent comprising SnO2; and optionally up to 2% of at least one coloring agent.

IPC Classes  ?

• C03C 3/085 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
• C03C 3/087 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
• C03C 10/14 - Silica crystalline phase, e.g. stuffed quartz, cristobalite

Abstract

The present application provides LAS type transparent glass-ceramics of β-quartz of composition containing a high content of zinc, articles constituted at least in part of said glass-ceramics, glasses precursors of said glass-ceramics (with a low viscosity at high temperature), and also a method of preparing said articles. Said glass-ceramics present a composition, free of arsenic oxide and antimony oxide, except for inevitable traces, expressed as percentages by weight of oxides, containing: 64.5% to 66.5% of SiO2;19.0% to 20.6% of Al2O3; 3.0% to 3.6% of Li2O; 0 to 1% of MgO; 1.7% to 3.4% of ZnO; 2% to 3% of BaO; 0 to 3% of SrO; 0 to 1% of CaO; 2% to 4% of TiO2; 1% to 2% of ZrO2; 0 to 1% of Na2O; 0 to 1% of K2O; with Na2O + K2O + BaO + SrO + CaO≤ 6%; optionally up to 2% of at least one fining agent comprising SnO2; and optionally up to 2% of at least one coloring agent.

IPC Classes  ?

• C03C 3/087 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
• C03C 10/14 - Silica crystalline phase, e.g. stuffed quartz, cristobalite

Goods & Services

Cooking hobs; glass-ceramic heating apparatus; glass-ceramic hobs without connection to the worktop sold as cooktops; glass-ceramic hobs without connection to the worktop sold as cooker units; glass-ceramic hobs without connection to the worktop sold as worktops; cooktops. Worktops; worktops as furniture; worktops for use with sinks. Heat-resistant glass-ceramic products; unworked and semi-worked ceramic glass, except building glass.

Goods & Services

Plates [parts of stoves]; Heating apparatus of glass ceramic; Slabs of glass ceramic, not connected to the worktop, sold as cooking hobs; Slabs of glass ceramic, not connected to the worktop, sold as stove elements; Slabs of glass ceramic, not connected to the worktop, sold as worktops; Cooking hobs. Work surfaces; Work surfaces in the nature of furniture; Counter tops for use with sinks. Heat-resistant products of glass ceramic; Unworked and semi-worked ceramic glass, except building glass.

Goods & Services

Electric cooking hobs; glass-ceramic heating apparatus for use in cooking food; electric glass-ceramic hobs without connection to the worktop sold as cooktops; electric glass-ceramic hobs without connection to the worktop sold as cooker units; electric glass-ceramic hobs without connection to the worktop sold as worktops; apparatus for cooking, namely, cooktops Worktops; worktops as furniture; worktops for use with sinks Heat-resistant glass-ceramic products, namely, plates sold as parts of stoves; unworked and semi-worked ceramic glass, except building glass

Goods & Services

Cooking plates, ovens, oven components, heating apparatus made of glass-ceramic materials. Chimney plates of glass-ceramic materials; flame-retardant and heat-resistant glass-ceramic products; unworked and semi-worked ceramic glass, except building glass.

Goods & Services

Cooking plates and cooktop panels made of glass ceramic, ceramic and glass, and sold as parts of ovens or as gas or electric cooktops; cooking ovens; cooking oven components, namely, glass plates and panels sold as part of ovens and electric or gas cooktops; cooking oven components, namely, glass plates and panels sold as part of ovens or as electric or gas cooktops, heat conducting glass plates and panels sold as part of ovens or as electric cooktops, structural plates for ovens, heat transferring plates and panels for electromagnetic ovens; heating apparatus made of glass-ceramic material, namely, electric and gas cooktops Chimney plates of glass-ceramic materials; flame-retardant and heat-resistant glass-ceramic products, namely, glass-ceramic sheets for general industrial and further manufacturing use; unworked and semi-worked ceramic-glass, except building glass

Abstract

The object of the present application is β-quartz glass-ceramics (having very interesting optical, thermal expansion and feasibility properties), the articles including said glass-ceramics; the precursor glasses of said glass-ceramics, as well as the methods for elaborating said glass-ceramics and said articles. Said glass-ceramics having a composition, free, except for inevitable trace amounts, of arsenic oxide, antimony oxide and rare earth oxide, which contains, expressed in percentages by weight of oxides: 64 to 70% of SiO2, 18 to 24% of Al2O3, 4 to 5% of Li2O, 0 to 0.6% of SnO2, >1.9 to 4% of TiO2, 1 to 2.5% of ZrO2, 0 to 1.5% of MgO, 0 to 3% of ZnO, >0.3 to 1 of CaO, 0 to 3% of BaO, 0 to 3% of SrO, with BaO + SrO ≤ 3 %, 0 to 1.5% of Na2O, 0 to 2% of K2O, with 0.2 <(MgO + Na2O + K2O)/Li2O ≤ 1, 0 to 3% of P2O5, less than 250 ppm of Fe2O3; and their crystallites, present in said β-quartz solid solution, have an average size of less than 40 nm, advantageously less than 35 nm, very advantageously less than 30 nm.

IPC Classes  ?

• C03C 3/087 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition

Abstract

Methods, compositions, and articles provide for LAS-type glass-ceramics having specific thermo-mechanical, optical and coloration characteristics to yield generally brown-grey products. The glass-ceramic materials may include as colorants iron oxide, vanadium oxide, chromium oxide, cobalt oxide, nickel oxide and/or cerium oxide.

IPC Classes  ?

• C03C 3/085 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
• C03C 3/087 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
• C03C 3/095 - Glass compositions containing silica with 40% to 90% silica by weight containing rare earths
• C03C 4/02 - Compositions for glass with special properties for coloured glass
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• F24C 15/10 - Tops, e.g. hot platesRings
• F24C 15/36 - Protective guards, e.g. for preventing access to heated parts

Abstract

β-quartz lithium aluminosilicate (LAS) glass-ceramics contain neither arsenic oxide nor antimony oxide, are fined with tin oxide and include vanadium oxide, chromium oxide and a high iron oxide content (>950 ppm), and have a controlled transmission curve. Articles such as cook-tops can be made from such glass-ceramics.

IPC Classes  ?

• C03C 3/085 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
• C03C 4/02 - Compositions for glass with special properties for coloured glass
• C03C 10/14 - Silica crystalline phase, e.g. stuffed quartz, cristobalite
• C03C 4/10 - Compositions for glass with special properties for infrared transmitting glass

Abstract

β-quartz lithium aluminosilicate (LAS) glass-ceramics contain neither arsenic oxide nor antimony oxide, are fined with tin oxide and include vanadium oxide, chromium oxide and a high iron oxide content (>1500 ppm), and have a controlled transmission curve. Articles such as cook-tops can be made from such glass-ceramics.

IPC Classes  ?

• C03C 3/085 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
• C03C 4/02 - Compositions for glass with special properties for coloured glass
• C03C 10/14 - Silica crystalline phase, e.g. stuffed quartz, cristobalite
• C03C 4/10 - Compositions for glass with special properties for infrared transmitting glass
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition

Abstract

The present invention relates to transparent, essentially colorless and non-diffusing β-quartz glass-ceramics; to articles including said glass- ceramics; to precursor glasses of said glass-ceramics as well as to the methods for elaborating said glass-ceramics and said articles. Said glass-ceramics have a composition, free of arsenic oxide, antimony oxide and rare earth oxide except for inevitable trace amounts, which contains, expressed as percentages by weight of oxides: 62-72% of SiO2, 20-23% of Al2O3, 2.8- 5% of Li2O, 0.1-0.6% of SnO2, 1.9- 4% of TiO2, 1.6-3% of ZrO2, less than 0.4% of MgO, 2.5-6% of ZnO and/or BaO and/or SrO, less than 250 ppm of Fe2O3; and their crystallites present in the β-quartz solid solution have an average size of less than 35 nm, advantageously less than 30 nm. In addition to their interesting optical properties, the glass-ceramics of the invention present low thermal expansion and they are easily obtained, even at an industrial scale.

IPC Classes  ?

• C03C 3/085 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition

Goods & Services

Cooking plates, ovens, oven components, heating apparatus made of glass-ceramic material. Glass-ceramic building materials; plates, panels and covering materials for floors and walls, false ceilings made of glass-ceramic materials; windows, doors, partitions, partitions for balconies, railings of glass-ceramic materials; chimneys. Chimney plates of glass-ceramic materials; flame-retardant and heat-resistant glass-ceramic products; unworked and semi-worked ceramic glass, except building glass.

Goods & Services

Cooking plates made of glass ceramic, ceramic and glass, and sold as parts of ovens and electric cooktops; cooking ovens; cooking oven components, namely, glass plates sold as part of ovens and electric cooktops; heating apparatus made of glass-ceramic material, namely, electric cooktops [ Glass-ceramic building materials, namely, building glass, glass-ceramic bricks, and glass-ceramic tiles; plates, panels and covering materials for floors and walls, namely, composite panels composed primarily of non-metal materials; false ceilings made of glass-ceramic materials, namely, non-metal suspended ceiling systems comprising non-metal panels; non-metal windows; non-metal doors; non-metal partitions for building; non-metal partitions for balconies, being building materials; non-metal railings of glass-ceramic materials for construction purposes; non-metal chimneys ] [ Chimney plates of glass-ceramic materials; flame-retardant and heat-resistant glass-ceramic products, namely, glass-ceramic sheets for use in the manufacture of ovens and electric cooktops; unworked and semi-worked ceramic glass, except building glass ]

Abstract

Beta-quartz glass-ceramics containing in their composition neither arsenic oxide nor antimony oxide and having a controlled transmission curve, articles made using the glass- ceramics, including cooktops, and precursor glasses of such glass-ceramics.

IPC Classes  ?

• C03C 3/087 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
• C03C 4/02 - Compositions for glass with special properties for coloured glass
• C03C 4/10 - Compositions for glass with special properties for infrared transmitting glass
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 10/14 - Silica crystalline phase, e.g. stuffed quartz, cristobalite

Abstract

The present invention relates to: - mineral materials selected from lithium aluminosilicate glasses containing vanadium, advantageously precursors of glass-ceramics, and glass-ceramics colored by vanadium containing solid solution(s) of β-quartz or (and) of β-spodumene as main crystalline phase: - articles in said mineral materials; as well as - methods for elaborating said glasses, glass-ceramics and articles in said glasses and glass-ceramics. The present invention was more particularly developed in the framework of optimizing the refining of lithium aluminosilicate glasses containing SnO2 as a fining agent in preparing glasses or glass-ceramics.

IPC Classes  ?

• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 3/087 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles

Abstract

The object of the present invention is a method for preparing an article, the structure of which comprises a substrate in a glass or in a glass-ceramic and an original coating fixed to at least one portion of the surface of said substrate, in a characteristic way, said coating, most particularly proposed with reference to the technical problem of VOC emission when it is brought to high temperature, is generated from at least one loaded polysilsesquioxane resin; said at least one polysilsesquioxane resin not containing any aryl radical in its structure. The object of the present invention is also the article which may be obtained after carrying said method.

IPC Classes  ?

• C03C 17/00 - Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating
• C03C 17/34 - Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
• H05B 3/74 - Non-metallic plates

Goods & Services

Hot plates, ovens, oven elements of glass-ceramics. Flame-retardant glass-ceramic products, being heat-resistant; unprocessed and semi-processed glass-ceramics.

Abstract

β-quartz glass-ceramics, the composition of which is most particularly optimized, with reference to the refining of their precursor glasses, with reference to good resistance to devitrification of said precursor glasses and with reference to their resistance to temperature ageing, articles comprising such glass-ceramics, lithium alumino-silicate glasses, which are precursors of such glass-ceramics, as well as methods for preparing such glass-ceramics and articles.

IPC Classes  ?

• C03C 3/085 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
• C03C 3/087 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles

Abstract

Transparent β-quartz glass-ceramics containing vanadium oxide. Such glass-ceramics have advantageous optical properties including good transmission in the infrared range, low transmission in the visible range, and significant transmission in the blue range for thicknesses of 3 mm. They can be used as materials for cooking top plates.

IPC Classes  ?

• C03C 10/14 - Silica crystalline phase, e.g. stuffed quartz, cristobalite

Abstract

Bi-containing glass-ceramic material, especially those containing β-quartz and/or β-spodumene solid solutions as the predominant crystalline phase, and the precursor glass material as well as process of making such glass-ceramic material and articles. The glass-ceramic can be made to have a dark color, and essentially to be free of V2O5, As2O3 and Sb2O3.

IPC Classes  ?

• C03C 3/083 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• H05B 1/02 - Automatic switching arrangements specially adapted to heating apparatus

Abstract

The present invention relates to a method for manufacturing a non-planar product in glass-ceramic. Said method comprises the following steps: (i) in a conventional furnace (3), heating a sheet of precursor glass of said glass-ceramic, so that said sheet becomes formable while avoiding its ceramming; (ii) forming said heated sheet; (iii) cooling said formed sheet (2b); (iv) ceramming said formed, cooled sheet.

IPC Classes  ?

• C03B 23/025 - Re-forming glass sheets by bending by gravity
• C03B 23/035 - Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum

Abstract

The invention relates to a transparent and essentially colorless β-quartz glass-ceramic material which is free of TiO2, As2O3, Sb2O3 and phosphates; articles formed from said glass-ceramic material; lithium aluminosilicate glasses, precursors for said glass-ceramic material; and methods of producing said glass- ceramic material and said articles formed from said glass-ceramic material.

IPC Classes  ?

• C03C 10/14 - Silica crystalline phase, e.g. stuffed quartz, cristobalite

Abstract

The invention mainly relates to a transparent, essentially colorless /?β-quartz glass-ceramic material, the composition of which is free of As2O3 and of Sb2O3 and contains a specific combination of three nucleating agents: TiO2, ZrO2 and SnO2; TiO2 being present in low quantity.

IPC Classes  ?

• C03C 3/085 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
• C03C 3/083 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound
• C03C 3/078 - Glass compositions containing silica with 40% to 90% silica by weight containing an oxide of a divalent metal, e.g. an oxide of zinc
• C03C 3/076 - Glass compositions containing silica with 40% to 90% silica by weight
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition

Abstract

The invention relates to a method for manufacturing a flat strip of glass as a precursor of glass-ceramic, that comprises the continuous flotation of the molten glass on a molten metal melt in a flotation housing, said glass being poured at the molten state and at a temperature exceeding the devitrification starting temperature on the molten metal upstream from the housing, said glass progressively forming a running strip on said metal melt, the glass cooling speed being of at least 18°C/min between, on the one side, the moment when the glass is at the theoretical temperature of maximum devitrification rate and, on the other end, the following moment when the glass is at the theoretical temperature at which the devitrification crystal growth rate becomes lower than 1 micron per minute. The glass thus floated shows no devitrification.

IPC Classes  ?

• C03B 18/02 - Forming sheets

Abstract

The present invention discloses a blue transparent glass-ceramic material comprising β-quartz solid solution as a predominant crystalline phase and process for making same. The glass-ceramic comprises TiO2 as a nucleating agent, sulphur and at least one metal oxide, advantageously MgO and/or ZnO. The process for making the glass-ceramic material comprises including a metal sulphide, such as ZnS and/or MgS, as a reducing agent in melting the precursor glass of the glass-ceramic material.

IPC Classes  ?

• C03C 1/10 - Ingredients generally applicable to manufacture of glasses, glazes or vitreous enamels to produce uniformly-coloured transparent products
• C03C 3/085 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
• C03C 3/095 - Glass compositions containing silica with 40% to 90% silica by weight containing rare earths
• C03C 4/02 - Compositions for glass with special properties for coloured glass
• C03C 10/14 - Silica crystalline phase, e.g. stuffed quartz, cristobalite

Abstract

The present invention relates to glass-ceramic materials-processes for making the same and articles comprising the same... The glass-ceramic material has a composition, by weight of the total composition, comprising 55-68% SiO2; 18-24% Al2O3; 3.3-4.1% Li2O; 1.5-4.0 % ZnO; 1.5-5.0% MgO; 2-5% TiO2; 0-2% ZrO2; 0-5% B2O3; 0-8% P2O5; 0-2% Na2O, 0-2% K2O; and at least one component resulting from an effective amount of at least one fining agent; wherein: the total Of B2O3 and P2O5 is at least 1.5% by weight, the total of MgO and ZnO is at least about 3.5% by weight, the total Of Na2O and K2O is less than about 3.0% by weight, the total of P2O5, B2O3, Na2O and K2O is less than about 11 % by weight, the weight ratio of the sum total of Na2O+K2O to the sum total of P2O5+B2O3 (Na2O+K2O) is less than about 0.5; advantageously the total Of P2O5, B2O3, B2O3 + P2O5 y Na2O and K 2O is less than about 9% by weight and the total Of Na2O ad K2O is less than about 2% by weight; and more advantageously the total Of P2O5, B2O3, Na2O and K2O is less than about 7% by weight and the total Of Na2O ad K2O is less than about 1% by weight. The glass-ceramic material comprises &bgr;-spodumene solid solution as the predominant crystalline phase. In certain embodiments the glass-ceramic material of the present invention is essentially free Of As2O3 and Sb2O3, and comprises about 0.3-1.2% by weight Of SnO2 and 0-1% of CeO2. The precursor glass for the glass-ceramic material of the present invention can be melted at below about 1600°C and cerammed into &bgr;-spodumene glass-ceramic at a relatively low temperature and in a relatively short period of time. The glass-ceramic material is especially advantageous for use in the production of cooktop plates and cooking utensils.

IPC Classes  ?

• C03C 10/12 - Lithium aluminosilicate, e.g. spodumene, eucryptite
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition

Abstract

The present application discloses: (i) novel glass-ceramic materials containing a solid solution of &bgr;-quartz or(and) of &bgr;-spodumene as main crystalline phase(s); (ii) articles made from said novel glass-ceramic materials; (iii) lithium alumino- silicate glasses, precursors of such novel glass-ceramic materials; and (iv) methods for preparing the aforesaid novel glass-ceramic materials and the aforesaid articles made of said novel glass-ceramic materials. The present invention relates to the use of SnO2 (0.15 to 0.3% by weight) and CeO2 and/or MnO2 (0.7 to 1.5% by weight), as an agent for fining the glass-ceramic material lass recursor.

IPC Classes  ?

• C03C 10/12 - Lithium aluminosilicate, e.g. spodumene, eucryptite
• C03C 1/00 - Ingredients generally applicable to manufacture of glasses, glazes or vitreous enamels

Abstract

The present invention relates to : - novel glass-ceramics of &bgr;-quartz and/or of &bgr;-spodumene ; - articles made from said novel glass-ceramics ; - lithium alumino-silicate glasses, which are precursors of said novel glass- ceramics ; - methods of preparing said novel glass-ceramics and articles made from said novel glass-ceramics. The present invention relates to the joint use of SnO2 and of Br, as an agent for fining the glass-ceramic glass precursor.

IPC Classes  ?

• C03C 3/11 - Glass compositions containing silica with 40% to 90% silica by weight containing halogen or nitrogen
• C03C 10/14 - Silica crystalline phase, e.g. stuffed quartz, cristobalite

Abstract

The invention relates to: a method of preparing glass-ceramics of &bgr;-quartz and/or of &bgr;-spodumene; a method of preparing articles made from said glass-ceramics; novel glass-ceramics of &bgr;-quartz and/or of &bgr;-spodumene; articles made from said novel glass-ceramics; and lithium aluminosilicate glasses, which are precursors of such novel glass-ceramics. The present invention relates to the joint use, as agent for fining the glass-ceramic glass precursor, of fluorine and at least one oxide of a multivalent element.

IPC Classes  ?

• C03C 3/112 - Glass compositions containing silica with 40% to 90% silica by weight containing halogen or nitrogen containing fluorine
• C03C 10/14 - Silica crystalline phase, e.g. stuffed quartz, cristobalite

Goods & Services

Cooking plates heated by gas or electricity.

Goods & Services

Cooking plates and ovens made of vitroceramic.

Goods & Services

Cooking plates and ovens made of vitroceramic.

Goods & Services

electric glass-ceramic cooking plates for domestic use, glass-ceramic cooking ovens for commercial use, domestic cooking ovens made of glass-ceramic, and glass-ceramic heating appliances, namely, portable electrical heaters, kerosene heaters, heat pumps, and steam and electric radiators for heating buildings glass-ceramic building materials, namely, plates and panels for use as ceiling, floor and wall coverings, suspended ceilings, glass-ceramic windows, glass-ceramic doors for building purposes, glass-ceramic partitions for creating walls for buildings, glass-ceramic balcony separations, glass-ceramic chimneys and chimney plates for buildings heat-proof glass-ceramic sheets for use in the manufacture of hobs and ovens

Goods & Services

electric glass-ceramic cooking plates for domestic use, glass-ceramic cooking ovens for commercial use, domestic cooking ovens made of glass-ceramic, and glass-ceramic heating appliances, namely, portable electrical heaters, kerosene heaters, heat pumps, and steam and electric radiators for heating buildings glass-ceramic building materials, namely, plates and panels for use as ceiling, floor and wall coverings, suspended ceilings, glass-ceramic windows, glass-ceramic doors for building purposes, glass-ceramic partitions for creating walls for buildings, glass-ceramic balcony separations, glass-ceramic chimneys and chimney plates for buildings heat-proof glass-ceramic sheets for use in the manufacture of hobs and ovens