Heat-conductive aluminum nitride sintered body and method of man

Details Heat-conductive aluminum nitride sintered body and method of man Heat-conductive aluminum nitride sintered body and method of man

1991-04-17

1992-02-04

Bell, Mark L.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428698, 428901, 501 97, 501 98, B32B 1800

Patent

active

050859234

ABSTRACT:
An aluminum nitride sintered body is mainly composed of aluminum nitride, contains 0.01 to 1.0 percent by weight of a rare earth element and 0.001 to 0.5 percent by weight of oxygen, and has thermal conductivity of at least 180 W/mK. According to a method of manufacturing such an aluminum nitride sintered body, aluminum nitride powder (201) is first prepared. At least one compound (203) containing a rare earth element is added to the aluminum nitride powder (201) to contain 0.01 to 1.0 percent by weight, in rare earth element conversion, of the compound, to be homogeneously mixed with each other. A formed body obtained by forming such mixed powder is sintered in a non-oxidizing atmosphere containing nitrogen at a temperature of 1500 to 2200.degree. C.

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Article entitled: "High Thermal Conductive AlN Ceramics by Pressureless Sintering in Reducing Atmosphere" (III)-Investigation of Additives--by Akihiro Horiguchi et al. (Toshiba R&D Center), pp. 967 & 970 of `Proceeding for 1987 Yogyo Kyokai's Annual Meeting`.
Article entitled "Aluminum Nitride Substrates Having High Thermal Conductivity" by Iwase et al.: Solid State Technology/Oct. 1986; No. 10, Port Washington, N.Y., U.S.A.; pp. 135-138.

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