CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Alary, Jean-André
Polge, Florent
Ronach, Patrick
Abrégé
The invention relates to sintered, polycrystalline, flat, geometrically structured ceramic grinding elements for use in resin-bonded grinding disks, in particular cutting disks. The invention also relates to a method for manufacturing flat, geometrically structured ceramic grinding elements of said type as well as to the use thereof.
B24D 3/28 - Propriétés physiques des corps ou feuilles abrasives, p. ex. surfaces abrasives de nature particulièreCorps ou feuilles abrasives caractérisés par leurs constituants les constituants étant utilisés comme agglomérants et étant essentiellement organiques en résines
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Bouchetou, Marie-Laure
Joubert, Olivier
Poirier, Jacques
Weissenbacher, Michael
Abrégé
The present invention relates to a sintered zirconia mullite refractory composite material, comprising 55-65 wt.% of Al2O3, 15-25 wt.% of SiO2, 15-25 wt.% of ZrO2 and less than 3 wt.% of raw material impurities, wherein the mineralogical composition of the composite material is 65-85 wt.% of mullite and 15-35 wt.% of zirconium dioxide.
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Alary, Jean-André
Skale, Franz
Abrégé
The present invention relates to heat treated alumina zirconia abrasive grains. Abrasive grains based on Al2O3 and ZrO2 fused in an electric arc furnace, having a weight content of Al2O3 between 52% und 62% by weight, ZrO2 + HfO2 between 35% and 45% by weight, with at least 6 % by weight, based on the total weight content of ZrO2, being present in the tetragonal and/or cubic high temperature modifications of Zr(¾, Si-compounds between 0.2% and 0.7% by weight, expressed as SiO2, carbon between 0.03% and 0.5% by weight, additives between 0.5% und 10% by weight, and raw-material-based impurities of less than 3% by weight are heat treated in air between 350°C and 700°C for a time period of 1 to 6 hours using a rotary kiln.
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Didavide, Maria, Cristina
Kunz, Reiner
Abrégé
The present invention relates to a transparent surface protection layer on the basis of synthetic resin comprising transparent solid particles, which comprise at least three different grain size fractions and encompass a Mohs hardness of at least 4» which are incorporated into the synthetic resin matrix, wherein the grain size fractions in each case encompass a monomodal grain size distribution and the solid particles are present as trimodal grain size distribution comprising a coarse fraction, a medium fraction and a fine fraction.
D21H 27/24 - Structures appliquées sur la surface par des procédés de fabrication particuliers, p. ex. dans des presses caractérisées par le fait que la surface à couvrir est constituée par des stratifiés de papiers en résines phénoliques, par des fibres vulcanisées ou par des panneaux de fibres cellulosiques similaires
D21H 27/26 - Structures appliquées sur la surface par des procédés de fabrication particuliers, p. ex. dans des presses caractérisées par la feuille de couverture ou par les couches supérieures des structures
B32B 29/00 - Produits stratifiés composés essentiellement de papier ou de carton
B32B 27/04 - Produits stratifiés composés essentiellement de résine synthétique comme substance d'imprégnation, de collage, ou d'enrobage
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Gebhartdt, Knuth
Zylka, Georg Paul
Abrégé
The present invention refers to an agglomerate abrasive grain made up of a mixture of individual abrasive grains and hollow bodies, wherein the abrasive grains and the hollow bodies are held together by means of a binding matrix of aluminosilicate and alkali silicate and the agglomerate abrasive grain has an open porosity and a closed porosity in each case of between 5% by volume and 40% by volume, wherein the total porosity of the agglomerate abrasive grain is less than 50% by volume.
B24D 3/14 - Propriétés physiques des corps ou feuilles abrasives, p. ex. surfaces abrasives de nature particulièreCorps ou feuilles abrasives caractérisés par leurs constituants les constituants étant utilisés comme agglomérants et étant essentiellement inorganiques céramiques, c.-à-d. agglomérants vitrifiés
C04B 28/00 - Compositions pour mortiers, béton ou pierre artificielle, contenant des liants inorganiques ou contenant le produit de réaction d'un liant inorganique et d'un liant organique, p. ex. contenant des ciments de polycarboxylates
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Xiong, Xiaoyong
Weissenbacher, Michael
Abrégé
The present invention relates to a refractory composition comprising 70 weight percent to 98 weight percent particulate refractory material and 2 weight percent to 30 weight percent of a binder phase comprising reactive filler and a binder, said binder phase substantially comprises solely reactive andalusite as reactive filler.
C04B 35/101 - Réfractaires obtenus à partir de mélanges à granulométrie contrôlée
C04B 35/18 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base de silicates autres que l'argile riches en oxyde d'aluminium
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Sachse, Sebastian
Abrégé
The invention relates to polycrystalline Al2O3 bodies based on melted aluminum oxide having an average crystallite size of the primary crystals between 20 μm and 100 μm and a closed macroporosity between 10 vol% and 30 vol%. The polycrystalline Al2O3 bodies are obtained by casting and quenching a liquid aluminum oxide melt while simultaneously seeding the poured stream with seed crystals and can be advantageously used to produce grinding elements and fireproof products.
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Knuth, Gebhardt
Abrégé
The invention relates to abrasive grains based on zirconia alumina melted in an electric arc furnace, comprising a content of 52 to 62 wt % Al2O3 and 35 to 45 wt % ZrO2, wherein the high-temperature phases of the zirconia are stabilized by a combination of reduced Ti compounds and yttrium oxide.
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Tontrup, Christoph
Lortz, Wolfgang
Perlet, Gabriele
Schmidt-Kluge, Erich
Frulli, Danilo
Abrégé
Slurry which contains a) from (50) to (80)% by weight of refractory particles having an average particle size of from (0.5) m to (150) m, b) from (5) to (35)% by weight of aluminium oxide particles having an average particle diameter of less than (300) nm and c) from (5) to (35)% by weight of water and d) a pH of from (5) to (12). Process for producing the slurry using a dispersion, and also the dispersion itself. Process for producing a casting mould, and also the casting mould itself.
B22C 9/02 - Moules en sable ou moules analogues pour pièces coulées
B22C 9/22 - Moules pour pièces de forme particulière
B22C 9/24 - Moules pour pièces de forme particulière pour pièces évidées
B22C 13/08 - Machines à mouler pour faire des moules ou noyaux de forme particulière pour moules ou noyaux en coquilles
B22C 1/08 - Compositions des matériaux réfractaires pour moules ou noyauxLeur structure granulaireCaractéristiques chimiques ou physiques de la mise en forme ou de la fabrication des moules caractérisées par des additions pour applications particulières, p. ex. indicateurs, addition pour faciliter la destruction du moule pour réduire le retrait du moule, p. ex. les enrobages de pièces de précision
10.
WEAR PROTECTION COATING BASED ON A SYNTHETIC RESIN MATRIX, METHOD FOR THE PRODUCTION THEREOF, AND USE THEREOF
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Didavide, Maria, Cristina
Kunz, Reiner
Abrégé
The invention relates to a wear protection coating having a mixture of non-homogenous transparent resin particles embedded in a matrix material and having a Mohs hardness of at least 6, and transparent solid particles, wherein the transparent solid particles comprise a bimodal grain size distribution. The invention further relates to a method for producing a wear protection coating and to the use thereof for producing wear-resistant surfaces, in particular surfaces of wood fiber boards having decorations.
B27N 7/00 - Post-traitement, p. ex. réduction du gonflement ou du retrait, surfaçageProtection des bords contre l'humidité
D21H 27/28 - Structures appliquées sur la surface par des procédés de fabrication particuliers, p. ex. dans des presses caractérisées par la feuille de couverture ou par les couches supérieures des structures traitées de façon à obtenir des propriétés de résistance spécifiques, p. ex. à l'usure ou aux intempéries
11.
ABRASIVE GRAIN AGGLOMERATES, PROCESS FOR THE PRODUCTION THEREOF AND THE USE THEREOF FOR PRODUCING ABRASIVES
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Gebhardt, Knuth
Abrégé
The present invention relates to abrasive grain agglomerates composed of fine-particle primary abrasive grains which are held together by means of a binder based on an aluminosilicate having a molar ratio of Al2O3 to SiO2 of from 1:2 to 1:20. The particular advantage of these abrasive grain agglomerates is that the binder cures fully at below 450°C, preferably below 400°C, to form abrasive grain agglomerates having an extraordinarily high strength.
B24D 3/00 - Propriétés physiques des corps ou feuilles abrasives, p. ex. surfaces abrasives de nature particulièreCorps ou feuilles abrasives caractérisés par leurs constituants
B24D 3/02 - Propriétés physiques des corps ou feuilles abrasives, p. ex. surfaces abrasives de nature particulièreCorps ou feuilles abrasives caractérisés par leurs constituants les constituants étant utilisés comme agglomérants
B24D 3/04 - Propriétés physiques des corps ou feuilles abrasives, p. ex. surfaces abrasives de nature particulièreCorps ou feuilles abrasives caractérisés par leurs constituants les constituants étant utilisés comme agglomérants et étant essentiellement inorganiques
B24D 3/14 - Propriétés physiques des corps ou feuilles abrasives, p. ex. surfaces abrasives de nature particulièreCorps ou feuilles abrasives caractérisés par leurs constituants les constituants étant utilisés comme agglomérants et étant essentiellement inorganiques céramiques, c.-à-d. agglomérants vitrifiés
B24D 3/18 - Propriétés physiques des corps ou feuilles abrasives, p. ex. surfaces abrasives de nature particulièreCorps ou feuilles abrasives caractérisés par leurs constituants les constituants étant utilisés comme agglomérants et étant essentiellement inorganiques céramiques, c.-à-d. agglomérants vitrifiés à structure poreuse ou alvéolaire
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Fuchs, Thomas
Abrégé
The invention relates to a method for treating the surfaces of solid particles to improve the processability of the solid particles in the electrostatic field and to reduce the dust formation which occurs during the processing of the solid particles.
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Didavide, Maria Christina
Kunz, Reiner
Abrégé
The present invention relates to sintered abrasive grit agglomerates based on aluminum oxide, having homogeneously distributed nanoscale pores in the range of 100-300nm, with a pore volume of at least 15%. The average diameter of primary particles of the aluminum oxide primary particles is less than 5μm, wherein said primary particles are connected to each other without additional adhesive agent.
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Didavide, Maria, Cristina
Alary, Jean-André
Kunz, Reiner
Abrégé
The invention relates to an anti-abrasion layer, comprising a mixture of irregular particles of hard material and round particles essentially free of cutting edges embedded in a matrix material and the use thereof for the production of anti-abrasion surfaces on wood materials, decorative paper, or wood fibre sheets printed with patterns for the production of, parquet floors, floor laminates, furniture surfaces or work boards and for the production of wear-resistant surface layers on support materials made from metal, glass, ceramics, plastic concrete or other materials.
D21H 27/28 - Structures appliquées sur la surface par des procédés de fabrication particuliers, p. ex. dans des presses caractérisées par la feuille de couverture ou par les couches supérieures des structures traitées de façon à obtenir des propriétés de résistance spécifiques, p. ex. à l'usure ou aux intempéries
B32B 27/04 - Produits stratifiés composés essentiellement de résine synthétique comme substance d'imprégnation, de collage, ou d'enrobage
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Kunz, Reiner
Abrégé
The invention relates to a method for production of tyre treads, wherein a rubber mixture in granular form mixed with particles of hard material is machined to give treads containing particles of hard material. The treads are applied to the tyre carcass and the green tyre thus obtained pressed and also profiled in a vulcanising press.
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Sachse, Sebastian
Abrégé
The present invention relates to an abrasive grain based on melted spherical corundum, the spherical corundum being clad with a relatively thick layer of fine-grained abrasive particulate solids. The cladding gives the spherical corundum properties which qualify it as abrasive grain.
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Alary, Jean-André
Sachse, Sebastian
Abrégé
The invention relates to a method for producing spherical corundum particles with a bulk density of between 1.5 kg/l and 2.5 kg/l. According to said method, between 0.1 and 1 % quartz sand is added to aluminium oxide and the mixture is fused in an electric arc furnace. The resultant melt is poured off in a quantity of less than 100 kg/min and the poured stream is blown using compressed air at a pressure of between 3 and 10 bar.
CENTER FOR ABRASIVES AND REFRACTORIES RESEARCH & DEVELOPMENT C.A.R.R.D. GMBH (Autriche)
Inventeur(s)
Möltgen, Paul
Abrégé
The invention relates to a ceramic sintered body made from a-Al2O3 with a content of 95 - 100 wt. % Al2O3, a relative sintered density of = 97 % of the theoretical density and a Vickers hardness HV0-2 of = 17.5 GPa, the crystallite structure of which has a mean primary crystal size for the Al2O3 crystals of ឬ 100 nm. The invention further relates to a method for production of a sintered body with a mean primary crystal size of = 100 nm, wherein a nanocrystalline a-Al2O3 is firstly produced starting from basic aluminium chloride which is further processed to give a sintered body with a mean primary crystallite size of = 100 nm.