Sinterable aluminum nitride composition, sintered body from this composition and process for producing the sintered body
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United States of America Patent
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Nov 5, 1991
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N/A
app pub date -
Aug 14, 1990
filing date -
Aug 13, 1985
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Abstract
A process for producing a sintered body of aluminum nitride, which comprises (1) forming a raw molded article from a homogeneous mixture of (A) a fine powder of aluminun nitride, and (B) a sintering aid composed substantially of (a) at least one halogen compound of at least one metal selected from the group consisting of alkaline earth metals, lanthanum group metals and yttrium, and (b) at least one halogen-free compound of at least one metal selected from the group consisting of alkaline earth metals, lanthanum group metals and yttrium; and (2) sintering the raw molded article at a temperature of 1600.degree. to 2100.degree. C. in a non-oxidizing atmosphere. A sintered body having a high thermal conductivity and a high density of at least 3.2 g/cm.sup.3 is prepared by the process.
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