PRODUCTION OF BORON NITRIDE POWDER

PURPOSE:To produce boron nitride with high time-space yield per reactor volume. CONSTITUTION:Powder of anhydrous boric acid or compounds which form anhydrous boric acid by heating is mixed with boron nitride powder, the mixture allowed to react in the nonoxidizing atmosphere including nitrogen, such...

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Bibliographic Details
Main Authors ICHIKAWA KAGETAKA, HATAKEYAMA FUMIO
Format Patent
LanguageEnglish
Published 08.01.1993
Subjects
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Summary:PURPOSE:To produce boron nitride with high time-space yield per reactor volume. CONSTITUTION:Powder of anhydrous boric acid or compounds which form anhydrous boric acid by heating is mixed with boron nitride powder, the mixture allowed to react in the nonoxidizing atmosphere including nitrogen, such as nitrogen and ammonia at >=1000 deg.C. Compared with the conventional industrial production where boron oxide or boride is used as raw material, not only a reburning process is made unnecessary but also time-space yield per volume of costly high temp. reactor is increased by several times in this method.
Bibliography:Application Number: JP19910173132