Patent ID: 8551203
Filing Date: 2013-10-08
Classification: C04B,C09K

Abstract:
1. A mixture of fused alumina/zirconia grains comprising, as percentages by weight: ZrO Al Other oxides: <10%; and SiO said mixture having less than 5% of grains comprising inclusions, and at least 50% of examined grains of said mixture having a concentration of nodules of greater than 500 nodules per mm wherein said mixture has a loose packed density meeting at least one of the following criteria: (1) more than 97% by weight of the grains do not pass through a sieve of square mesh with a side length of 1400 μM and less than 20% by weight of the grains do not pass through a sieve of square mesh with a side length of 2360 μm, and the loose packed density is greater than 2.18 g/cm (2) more than 96% by weight of the grains do not pass through a sieve of square mesh with a side length of 1000 μm and less than 3% by weight of the grains do not pass through a sieve of square mesh with a side length of 1700 and the loose packed density is greater than 2.04 g/cm (3) more than 92% by weight of the grains do not pass through a sieve of square mesh with a side length of 600 μm and less than 18% by weight of the grains do not pass through a sieve of square mesh with a side length of 850 μm, and the loose packed density is greater than 1.94 g/cm (4) more than 92% by weight of the grains do not pass through a sieve of square mesh with a side length of 425 μm and less than 18% by weight of the grains do not pass through a sieve of square mesh with a side length of 600 μm, and the loose packed density is greater than 1.85 g/cm (5) more than 96% by weight of the grains do not pass through a sieve of square mesh with a side length of 300 μm and less than 7% by weight of the grains do not pass through a sieve of square mesh with a side length of 500 μm, and the loose packed density is greater than 1.83 g/cm (6) more than 96% by weight of the grains do not pass through a sieve of square mesh with a side length of 250 μm and less than 3% by weight of the grains do not pass through a sieve of square mesh with a side length of 425 μm, and the loose packed density is greater than 1.82 g/cm (7) more than 96% by weight of the grains do not pass through a sieve of square mesh with a side length of 150 μm and less than 3% by weight of the grains do not pass through a sieve of square mesh with a side length of 250 μm, and the loose packed density is greater than 1.79 g/cm