Porous free standing pyrolytic boron nitride articles

Details Porous free standing pyrolytic boron nitride articles Porous free standing pyrolytic boron nitride articles

C - Chemistry, Metallurgy

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C01B 21/064 (2006.01) C04B 35/58 (2006.01) C04B 35/583 (2006.01) C04B 38/00 (2006.01) C23C 16/01 (2006.01)

Patent

CA 1201280

POROUS FREE STANDING PYROLYTIC BORON NITRIDE ARTICLES ABSTRACT OF THE DISCLOSURE A sponge-like free-standing pyrolytic boron article is made by reacting ammonia and gaseous boron halide diluted with an inert gas to deposit pyrolitic boron nitride on a porous substrate such as open-pored vitreous carbon under a vacuum and then removing the substrate as by oxidation. S P E C I F I C A T I O N - 1 -

411601

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