Chemistry of inorganic compounds – Boron or compound thereof – Binary compound
Patent
1989-05-19
1991-10-29
Straub, Gary P.
Chemistry of inorganic compounds
Boron or compound thereof
Binary compound
428366, 501 95, C01B 21064, C01B 3514
Patent
active
050614690
ABSTRACT:
A process for the production of boron nitride is carried out by condensing a mixture of a B-tris-(loweralkylamino)borazine with an alkylamine in an inert gas atmosphere at a temperature of 150.degree. C. or above to prepare a precursor, forming the precursor into a desired shape and then slowly heating the shaped precursor in an ammonia gas atmosphere until the precursor changes to a white boron nitride product.
The shaped boron nitride in a form of fiber is particularly useful as a reinforcement.
REFERENCES:
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patent: 4545968 (1985-10-01), Hirano et al.
patent: 4731437 (1988-03-01), Taniguchi et al.
Synthesis and Calcination of Boron Nitride Polymer; Mr. Kimura, delivered Nov. 11-12, 1986.
An Inorganic Polymer and Ceramic Material; Mr, Kimura, delivered 5/20/88.
Synthesis of Boron Nitride Fiber which precursor is B-tris (methylamino) borazine condensate; Mr. Kimura, delivered 11/17/88.
Boron Nitride Fiber by a Precursor Process; Mr. Kimura, delivered 7/88.
Boron Nitrogen Polymer. I. Mechanistic Studies of Borazine Pyrolyses; Journal of Polymer Science vol. 24 173-185 (1986).
Synthesis of Boron Nitride Ceramics; J. Am. Chem. Soc. vol. 109, 5556-5557 (1987).
Bierman Jordan B.
Kalinchak Stephen G.
Mitsubishi Kasei Corporation
Straub Gary P.
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