Produits et services

Articles made from fused silica or non-crystalline silica glass, namely, ingots, tubes, rods, discs, plates and rings, all for general industrial and further manufacturing use; Fused silica as a semi-finished product, namely, ingots, tubes, rods, discs, plates and rings all for general industrial and further manufacturing use; Vitreous silica fibers, other than for textile use; vitreous silica fibres, other than for textile use Vitreous silica yarns and fabrics in the nature of fibers silica-based sewing thread and yarn; silica-based sewing thread and yarn for textile use, ropes, braids other than for textile use silica-based sewing thread and yarn; silica-based sewing thread and yarn for textile use

Abrégé

The invention concerns a device for collecting solar radiation comprising a receiver of solar radiation and a wall comprising a surface positioned facing the receiver, the surface being made from a reflective ceramic material comprising particles having a diameter of between 100nm and 100µm or pores having a diameter of between 100nm and 100µm. The reflective ceramic material makes it possible to recover heat not directly received by the receiver or escaping from the receiver, in order to send it back to said receiver.

Classes IPC  ?

• F24J 2/07 - Récepteurs à haute température, p.ex. pour centrales solaires
• G02B 5/08 - Miroirs
• G02B 5/02 - DiffuseursÉléments afocaux
• F24J 2/10 - munis de réflecteurs comme éléments de concentration

Abrégé

the sum of the concentrations of zinc oxide, alkali metal oxide and alkaline earth oxide in the glass extending from 15 to 65 mol %. This composition is intended to be molded at a temperature above the Tg of the glass so as to form composite parts that can serve as an electrical insulator.

Classes IPC  ?

• C03C 8/02 - Compositions en verre fritté, c.-à-d. broyées ou sous forme de poudre
• H01B 3/08 - Isolateurs ou corps isolants caractérisés par le matériau isolantEmploi de matériaux spécifiés pour leurs propriétés isolantes ou diélectriques composés principalement de substances inorganiques quartzIsolateurs ou corps isolants caractérisés par le matériau isolantEmploi de matériaux spécifiés pour leurs propriétés isolantes ou diélectriques composés principalement de substances inorganiques verreIsolateurs ou corps isolants caractérisés par le matériau isolantEmploi de matériaux spécifiés pour leurs propriétés isolantes ou diélectriques composés principalement de substances inorganiques laine de verreIsolateurs ou corps isolants caractérisés par le matériau isolantEmploi de matériaux spécifiés pour leurs propriétés isolantes ou diélectriques composés principalement de substances inorganiques laine de laitierIsolateurs ou corps isolants caractérisés par le matériau isolantEmploi de matériaux spécifiés pour leurs propriétés isolantes ou diélectriques composés principalement de substances inorganiques émaux vitreux
• C03C 3/064 - Compositions pour la fabrication du verre contenant de la silice avec moins de 40% en poids de silice contenant du bore
• C03C 3/066 - Compositions pour la fabrication du verre contenant de la silice avec moins de 40% en poids de silice contenant du bore contenant du zinc
• C03C 4/16 - Compositions pour verres ayant des propriétés particulières pour verre diélectrique
• C03C 14/00 - Compositions de verre contenant un constituant non vitreux, p. ex. compositions contenant des fibres, filaments, trichites, paillettes ou similaires, dispersés dans une matrice de verre

Produits et services

Rigid mineral materials, consisting of ultra-pure silica fibers, in the form of machinable slabs or blocks for use in thermal treatment equipment such as ovens, drying kilns or driers, for use as UV radiation, visible and infrared light reflectors and/or for use as thermal insulation in a temperature range that can go from 100° to 1,200°C; rigid mineral materials, consisting of ultra-pure silica fibers, in the form of machinable slabs or blocks for the purpose of reflecting visible radiation in powerful lighting apparatus by providing thermal insulation against temperatures higher than 100°C.

Abrégé

The invention relates to a crucible which has a polygonal opening, in particular a square or rectangular opening, and which is made of arc-melted silica, as well as to a method for manufacturing same, which includes: shaping powdered silica in a hollow mold (3) having a polygonal opening, said mold (3) being provided with a multiplicity of channels passing through the bottom (10) and the walls (12, 13, 14, 15) thereof, said channels being distributed over the entire inner surface thereof, so as to constitute a preform; then melting the silica inside the perform using an electric arc; and suctioning the gases through the mold and the preform, thereby generating a gas flow having a speed of at least 0.15 m/second at any point in the inner surface of the preform at the start of the melting.

Classes IPC  ?

• C03B 19/09 - Autres méthodes de façonnage du verre par fusion de particules de verre dans un moule de mise en forme
• C30B 25/00 - Croissance des monocristaux par réaction chimique de gaz réactifs, p. ex. croissance par dépôt chimique en phase vapeur
• C30B 15/10 - Creusets ou récipients pour soutenir le bain fondu

Abrégé

The invention relates to a method and device for purifying air by passing a stream of air through a filter having photocatalytic activity exposed to UV light, said filter including a felt of mineral fibres, the fibres of which are coated with a material having photocatalytic activity, the air remaining in contact with the filter for longer than 70 msec and the UV light having a power of less than 35 mW per cm2 of illuminated surface of the filter having photocatalytic activity. The invention is particularly effective for eliminating volatile organic compounds from air.

Classes IPC  ?

• B01D 53/86 - Procédés catalytiques
• B01D 53/88 - Manipulation ou montage des catalyseurs

Produits et services

Rigid mineral materials, consisting of ultra-pure silica fibers, in the form of machinable slabs or blocks for use in thermal treatment equipment such as ovens, drying kilns or driers, for use as UV radiation, visible and infrared light reflectors and/or for use as thermal insulation in a temperature range that can go from 100° to 1,200°C; rigid mineral materials, consisting of ultra-pure silica fibers, in the form of machinable slabs or blocks for the purpose of reflecting visible radiation in powerful lighting apparatus by providing thermal insulation against temperatures higher than 100°C

Abrégé

The invention relates to a composition including mica and glass, said glass including: 10 to 30 % of SiO2 moles; 5 to 40 % of BaO moles; 15 to 30 % of B2O3 moles, the total level of zinc oxide, alkaline oxide and alkaline-earth oxide moles in the glass ranging from 15 to 65%. Said composition is intended for being moulded at a temperature higher than the Tg of the glass to form composite parts that can be used as electrical insulators.

Classes IPC  ?

• C03C 1/00 - Ingrédients généralement utilisés pour la fabrication des verres, glaçures ou émaux vitreux
• C03C 14/00 - Compositions de verre contenant un constituant non vitreux, p. ex. compositions contenant des fibres, filaments, trichites, paillettes ou similaires, dispersés dans une matrice de verre
• H01B 3/04 - Isolateurs ou corps isolants caractérisés par le matériau isolantEmploi de matériaux spécifiés pour leurs propriétés isolantes ou diélectriques composés principalement de substances inorganiques mica
• C03C 3/064 - Compositions pour la fabrication du verre contenant de la silice avec moins de 40% en poids de silice contenant du bore
• C03C 4/16 - Compositions pour verres ayant des propriétés particulières pour verre diélectrique
• H01B 3/08 - Isolateurs ou corps isolants caractérisés par le matériau isolantEmploi de matériaux spécifiés pour leurs propriétés isolantes ou diélectriques composés principalement de substances inorganiques quartzIsolateurs ou corps isolants caractérisés par le matériau isolantEmploi de matériaux spécifiés pour leurs propriétés isolantes ou diélectriques composés principalement de substances inorganiques verreIsolateurs ou corps isolants caractérisés par le matériau isolantEmploi de matériaux spécifiés pour leurs propriétés isolantes ou diélectriques composés principalement de substances inorganiques laine de verreIsolateurs ou corps isolants caractérisés par le matériau isolantEmploi de matériaux spécifiés pour leurs propriétés isolantes ou diélectriques composés principalement de substances inorganiques laine de laitierIsolateurs ou corps isolants caractérisés par le matériau isolantEmploi de matériaux spécifiés pour leurs propriétés isolantes ou diélectriques composés principalement de substances inorganiques émaux vitreux

Abrégé

The invention relates to a continuous strip comprising a fibrous structure including continuous or discontinuous fiber and a resin which is tacky at a temperature between ambient temperature and 300°C, said strip having a dielectric constant of between 2 and 7 and a dielectric tangent of between 1.10-4 and 3.10-2 at 20°C and at 9.375 GHz. The above-mentioned fibrous structure is sufficiently stiff so that the strip has a stiffness of between 5 and 30° at a temperature at which the resin is tacky, the stiffness of the strip being measured on the basis of a 15cm-long rectilinear segment, 5 cm of which is placed on the edge of a horizontal surface and the remaining unsupported 10 cm collapsing to form an angle with the horizontal that characterizes the stiffness of the strip. The strip of the invention is particularly suitable for the production of dielectric composite materials, such as radomes, using fiber positioning technologies.

Classes IPC  ?

• C08J 5/04 - Renforcement des composés macromoléculaires avec des matériaux fibreux en vrac ou en nappes
• C08J 5/24 - Imprégnation de matériaux avec des prépolymères pouvant être polymérisés en place, p. ex. fabrication des "prepregs"
• H01Q 1/28 - Adaptation pour l'utilisation dans ou sur les avions, les missiles, les satellites ou les ballons
• H01Q 1/42 - Enveloppes non intimement mécaniquement associées avec les éléments rayonnants, p. ex. radome
• B29C 70/30 - Façonnage par empilage, c.-à-d. application de fibres, de bandes ou de feuilles larges sur un moule, un gabarit ou un noyauFaçonnage par pistolage, c.-à-d. pulvérisation de fibres sur un moule, un gabarit ou un noyau

Abrégé

The invention relates to a particulate filter comprising a cartridge and a filter media placed in the cartridge in the prefiltering position, said filter media being essentially mineral. Thanks to the absence of any organic compound, the filter media generates no volatile organic compound. The filter media may also be of the type having a photocatalytic action.

Classes IPC  ?

• B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés

Abrégé

The invention relates to a photocatalytic-action filtration medium having a thickness of at least 2 mm, homogenous and without any opening visible to the naked eye, that comprises a felt of inorganic fibres in which the fibres are coated with a coating containing a photocatalytic-action catalyst, said felt having a basis weight of between 30 and 80 g/m2, said coating representing 5 to 80% of the mass of said medium, said medium having a gas head loss lower than 150 Pa at 1 m/sec in a non-folded state. The medium is intended for containing a gas (e.g. air) cleaner, and also comprises a system for the UV-lighting of said medium. The medium has an excellent purification efficiency and a very low head loss.

Classes IPC  ?

• B01J 35/00 - Catalyseurs caractérisés par leur forme ou leurs propriétés physiques, en général
• B01J 35/06 - Etoffes ou filaments
• C03C 25/42 - Revêtements contenant des substances inorganiques

Abrégé

The invention relates to a gas purifier that comprises a photocatalytic-action filtration medium, a system for the UV-lighting of said medium, a retarder means or an analyser of a volatile organic compound, a means for automatically adjusting the speed of the gas flowing therethrough or for adjusting the intensity of the UV-lighting, said adjustment being made based on the time determined by the retarder means or based on the content of the volatile organic compound analysed by the analyser. The invention also relates to a method for purifying a gas using a purifier that comprises a photocatalytic-action filtration medium and a system for the UV-lighting of said medium, according to which, when the concentration of a compound in the gas is higher than a value V1, the operation mode of the purifier is lower than the mode thereof when the concentration of the compound in the gas is lower than a value V2, V2 being lower than or equal to V1. The invention also relates to a method for purifying a gas using a purifier that comprises photocatalytic-action filtration medium, a system for the UV-lighting of said medium, and a retarder means for controlling the mode of the purifier.

Classes IPC  ?

• B01J 35/00 - Catalyseurs caractérisés par leur forme ou leurs propriétés physiques, en général

Produits et services

electrical insulators

Produits et services

Fused silica. Silica yarns and fabrics for applications in various industrial fields such as for thermal insulation and electric wiring at high temperatures, for the manufacture of printed circuits, for composite aerospace materials and for composite materials for sports articles.

Produits et services

Electrical insulators and, more specifically, objects consisting of mica fused by means of a vitreous binder and intended for electrical insulation.

Produits et services

(1) Electrical insulating materials.