CHARGE FOR PRODUCING MONOCRYSTALS OF CUBICAL BORON NITRIDE Russian patent published in 1995 - IPC

FIELD: production of instruments. SUBSTANCE: proposed charge contains graphite-like boron nitride and lithium hydride, sodium azide is used as filler, its quantity being 8.0-25 mass %. Mixture of sodium azide having selenium, sulfur and tellurium additives (their quantity being 0.5-5.0 mass %) also may be used as said charge. The most preferred ratio of lithium hydride and sodium azide is 1:1. EFFECT: increases strength of monocrystal, increases yield of desired fraction. 3 cl, 2 tbl