Compositions: ceramic – Ceramic compositions – Refractory
Patent
1991-07-31
1992-09-15
Langel, Wayne
Compositions: ceramic
Ceramic compositions
Refractory
501 98, C04B 3558
Patent
active
051478323
ABSTRACT:
An AlN sintered body which has a color within the range of gray to black and a thermal conductivity within the range of 100 to 270 W/m.multidot.K at room temperature. Such a body is useful as an electronic material and a method of preparing the same. The AlN sintered body contains 100 parts by weight of AlN, 0.005 to 0.5 parts by weight of carbon, not more than 1 part by weight of a boron compound in terms of the simple substance of boron, 0.01 to 15 parts by weight of a rare earth aluminum oxide in terms of the simple substance of the rare earth element, and 0.01 to 15 parts by weight of a compound containing an element belonging to the group IVB of the periodic table in terms of the simple substance of the element. This AlN sintered body is obtained by shaping a mixture of the above components into a prescribed configuration and thereafter firing the as-formed compact in a non-oxidizing atmosphere containing at least 10 percent by volume of nitrogen, at a temperature of 1500.degree. to 2100.degree. C.
REFERENCES:
patent: 4478785 (1984-10-01), Huseby et al.
patent: 4833108 (1989-05-01), Mizuno et al.
patent: 4843038 (1989-06-01), Kuratani et al.
patent: 5001089 (1991-03-01), Kasori et al.
patent: 5034357 (1991-07-01), Yamakawa
Maeda Takao
Miyake Masaya
Shimoda Kouhei
Sogabe Kouichi
Fasse W. G.
Langel Wayne
Sumitomo Electric Industries Ltd.
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