Chemistry of inorganic compounds – Boron or compound thereof – Binary compound
Patent
1982-11-02
1985-11-05
Gantz, D. E.
Chemistry of inorganic compounds
Boron or compound thereof
Binary compound
423276, 502202, B01J 2102, C01B 3500, C01B 21064
Patent
active
045513163
ABSTRACT:
A boron nitride type compound of the formula: LiMBN.sub.2 where M is calcium or barium and other similar compounds are provided. These compounds are prepared by heating a mixture of (i) finely divided Li.sub.3 N or metallic lithium, (ii) finely divided alkaline earth metal nitride selected from Ca.sub.3 N.sub.2, Mg.sub.3 N.sub.2, Sr.sub.3 N.sub.2, Ba.sub.3 N.sub.2 and Be.sub.3 N.sub.2, and/or an alkaline earth metal selected from Ca, Mg, Sr, Ba and Be, and (iii) hexagonal boron nitride at 800.degree. to 1,300.degree. C. in an inert gas or ammonia atmosphere thereby to react the ingredients (i), (ii) and (iii) with each other in a molten state, and then, cooling the reaction product to be solidified. The above-mentioned compounds are useful as a catalyst for use in the production of cubic boron nitride from hexagonal boron nitride.
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Gantz D. E.
Showa Denko Kabushiki Kaisha
Wright William G.
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