Low carbon/high purity boron nitride

Details Low carbon/high purity boron nitride Low carbon/high purity boron nitride

1990-02-20

1991-06-04

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501 49, 501 92, 423276, 423290, 423292, 423298, C03C 314, C04B 3551, C04B 3556, C04B 3558

Patent

active

050213717

ABSTRACT:
Highly pure boron nitride ceramic material, devoid of silicon values and having low carbon content, is prepared by pyrolyzing, under an atmosphere of ammonia, the product of the reaction between (i) at least one B-trihalogeno-borazole having the formula: ##STR1## and (ii) at least one primary amine having the formula:

REFERENCES:
patent: 4054708 (1977-10-01), Robba et al.
patent: 4578283 (1986-03-01), Kirtley et al.
patent: 4581468 (1986-04-01), Paciorek et al.
patent: 4707556 (1987-11-01), Paciorek et al.
patent: 4801439 (1989-11-01), Blum et al.
patent: 4810436 (1989-03-01), Johnson

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