Abrasive grain and manufacture for the same

Details Abrasive grain and manufacture for the same Abrasive grain and manufacture for the same

1992-11-18

1994-04-19

Group, Karl

Abrasive tool making process, material, or composition

With inorganic material

Metal or metal oxide

501 12, 501153, 501127, C09C 168

Patent

active

053042263

ABSTRACT:
An abrasive grain for use as a grinding material comprising alpha-alumina crystal particles substantially smaller than 0.5 microns, solidly dissolved with at least one of Ti, Mn, V, Ga, Zn and Rh, and with an a-axis length of the hexagonal unit cell of the alpha-Al.sub.2 O.sub.3 from 4.75892 to 4.76340 angstroms when measured by a powder X-ray diffraction method, and a density of more than 90% of the theoretical value, and an abrasive grain for a grinding material, comprising alpha-alumina crystal particles substantially less than 0.5 microns, solidly dissolved with at least one of Mg, Ni and Co, and with an a-axis length of the hexagonal unit cell of the alpha-Al.sub.2 O.sub.3 from 4.75930 to 4.76340 .ANG. when measured by a powder X-ray diffraction method, and a density of more than 90% of the theoretical value, and further, a grinding wheel and coated cloth manufactured from these abrasive grains.

REFERENCES:
patent: 4314827 (1982-02-01), Leitheiser et al.
patent: 4518397 (1985-05-01), Leitheiser et al.
patent: 4623364 (1986-11-01), Cottringer et al.
patent: 4744802 (1988-05-01), Schwabel
patent: 4786292 (1988-11-01), Janz et al.
patent: 4799938 (1989-01-01), Janz et al.
patent: 5076815 (1991-12-01), Kunz et al.
patent: 5114891 (1992-05-01), Kunz et al.
"Trends of Al.sub.2 O.sub.3 Ceramics for Cutting Tools" Tanaka Hiroshi, Precision Instruments, 39(9), 917 (1973).

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