| 摘要 |
PURPOSE:To obtain a high-purity metal nitride contg. no oxygen and carbon, by heating metal nitride powder contg. carbon in a gaseous atmosphere contg. NH3 and CmHn at the specified temp. CONSTITUTION:A mixture of a metal oxide and carbon is heated in a nitrogen atmosphere to obtain a metal nitride. The obtained metal nitride powder contg. carbon is heated at 600-1,800 deg.C in a gaseous atmosphere contg. CmHn. As a result, the metal nitride itself is not oxidized, and only carbon is oxidized and removed.
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