Abstract: Heat treated alumina zirconia abrasive grains based on Al2O3 and ZrO2 may be fused in an electric arc furnace, and may have a weight content of: Al2O3 between 52% and 62% by weight; ZrO2 and 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 ZrO2; 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% and 10% by weight; and raw-material-based impurities of less than 3% by weight. The heat treated alumina zirconia abrasive grains may be heat treated in air between 350° C. and 700° C. for a time period of one to six hours using a rotary kiln.

Abstract: Heat treated alumina zirconia abrasive grains based on Al2O3 and ZrO2 may be fused in an electric arc furnace, and may have a weight content of: Al2O3 between 52% und 62% by weight; ZrO2 and 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 ZrO2; 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% and 10% by weight; and raw-material-based impurities of less than 3% by weight. The heat treated alumina zirconia abrasive grains may be heat treated in air between 350° C. and 700° C. for a time period of one to six hours using a rotary kiln.

Abstract: A flowable, granular abrasive material and method of manufacture thereof. The material is comprised of at least one abrasive grain selected from aluminum oxide, silicon carbide, cubic boron nitride and/or diamond and has a organic or inorganic coating comprised of a binder and an abrasive filling material in the amounts of 0.5 to 8% and 1 to 15% by weight, respectively. The filling material may include sulfides, phosphates, carbonates, halogenides, and/or sulfide-, carbonate- and/or halogenide-containing complex compounds. The binder may include a low-viscosity phenol resin, epoxy resin and/or polyurethane resin.

Abstract: A flowable, granular abrasive material and method of manufacture thereof. The material is comprised of at least one abrasive grain selected from aluminum oxide, silicon carbide, cubic boron nitride and/or diamond and has a organic or inorganic coating comprised of a binder and an abrasive filling material in the amounts of 0.5 to 8% and 1 to 15% by weight, respectively. The filling material may include sulfides, phosphates, carbonates, halogenides, and/or sulfide-, carbonate- and/or halogenide-containing complex compounds. The binder may include a low-viscosity phenol resin, epoxy resin and/or polyurethane resin.

Abstract: A flowable, granular abrasive material and method of manufacture thereof. The material is comprised of at least one abrasive grain selected from aluminum oxide, silicon carbide, cubic boron nitride and/or diamond and has a organic or inorganic coating comprised of a binder and an abrasive filling material in the amounts of 0.5 to 8% and 1 to 15% by weight, respectively. The filling material may include sulfides, phosphates, carbonates, halogenides, and/or sulfide-, carbonate- and/or halogenide-containing complex compounds. The binder may include a low-viscosity phenol resin, epoxy resin and/or polyurethane resin.

Abstract: A method for the production of an oxide of aluminum based corundum abrasive having a titanium oxide content of less than 0.8 wt. %, wherein the oxide of aluminum is processed by means of a melt or sintering process to form a compact base body for abrasive grains; the base body for abrasive grains is comminuted; the abrasive grain strip thus obtained is graded and the manufactured grain or the graded strip of abrasive grain is subsequently post-treated thermally at temperatures of 800-1500° C. in order to increase the tenacity thereof. The invention also relates to the use of the corundum abrasive grain in abrasives.