Silicon nitride powder

Details Silicon nitride powder Silicon nitride powder

1995-08-09

1997-06-24

Langel, Wayne

Compositions

Preservative agents

Anti-corrosion

423344, 501 971, C01B 2168, B01J 1300

Patent

active

056414340

ABSTRACT:
A silicon nitride powder which provides a water-based slurry with a low viscosity and a high powder concentration. The silicon nitride powder has a specific surface area of 6 to 25 m.sup.2 /g, a number of coarse particles of coarse primary particles, agglomerated particles and/or fused particles, and having a size of 3 to 50 .mu.m, of not more than 1000 per 1 cm.sup.3 of the powder, a number of foreign metallic particles, having a size of more than 20 .mu.m, of not more than 3 per 1 cm.sup.3 of the powder, and a number of foreign metallic particles, having a size of 10 to 20 .mu.m, of not more than 15 per 1 cm.sup.3 of the powder.

REFERENCES:
patent: 4122155 (1978-10-01), Prochazka et al.
patent: 4710368 (1987-12-01), Ritsko et al.
patent: 4929432 (1990-05-01), Shen
patent: 5126295 (1992-06-01), Uchino et al.
patent: 5348919 (1994-09-01), Kuwabara et al.

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