Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Metal and nonmetal in final product
Patent
1995-05-10
1996-05-28
Walsh, Donald P.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Metal and nonmetal in final product
419 5, 419 6, 419 10, 419 19, 419 32, 419 33, 419 36, 419 40, B22F 700
Patent
active
055208789
ABSTRACT:
An unsintered aluminum nitride body including:
(a) 1 to 5 weight percent of a vitreous solid of boria, alumina, and calcia in the proportions of (1) boria between 3 and 25 weight percent, (2) alumina between 10 and 50 weight percent, and (3) calcia between 40 and 80 weight percent; and
(b) aluminum nitride powder as the balance of the aluminum nitride body.
The invention further relates to a method of forming the unsintered aluminum nitride body and then sintering it at a temperature between 1550 and 1650 degrees Centrigrade so as to form a dense, thermally conductive aluminum nitride body.
REFERENCES:
patent: 5292477 (1994-03-01), Chance et al.
patent: 5296189 (1994-03-01), Kang et al.
patent: 5424261 (1995-06-01), Harris et al.
patent: 5429790 (1995-07-01), Takahashi
Japan Kokai Tokkyo Koho JP 04,154,670, 27 May 1992, Appl. 90/276,803.
Physics and Chemistry of Glasses, vol. 2, No. 3, Jun. 1961, by A. E. Owen, "Properties of Glasses in the System CaO-B.sub.2 O.sub.3 -Al.sub.2 O.sub.3, Part. 1. The d.c. conductivity and structure of calcium boroaluminate glasses".
Duncombe Peter R.
Shinde Subhash L.
Takamori Takeshi
Blecker Ira David
Greaves John N.
International Business Machines - Corporation
Walsh Donald P.
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