Aluminum nitride-based sintered body and process for the product

Details Aluminum nitride-based sintered body and process for the product Aluminum nitride-based sintered body and process for the product

1991-10-03

1992-10-13

Bell, Mark L.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

501 96, C04B 3558, C04B 3550

Patent

active

051548631

ABSTRACT:
An aluminum nitride-based sintered body having a thermal conductivity of greater than 110 W/mK and a relative density of at least 90% and a process for the production thereof are disclosed. The sintered body contains minor amounts of at least one compound of a Group IIa metal and at least one compound of a Group IIIa metal of the Periodic Table and can be produced from an aluminum nitride starting powder prepared by direct nitriding of metallic aluminum powder and having a purity of at lest 99%, an oxygen content of lower than 1.8%, and an Si content of at most 1.0% by mixing the starting powder with powdery sintering additives consisting of at least one metal or compound of a Group IIa metal such as Ca and at least one metal or compound of a Group IIIa metal such as Y, shaping the powder mixture, and baking the shaped mixture at a relatively low temperature.

REFERENCES:
patent: 4591537 (1986-05-01), Aldinger et al.
patent: 4698320 (1987-10-01), Kasori et al.
patent: 4711861 (1987-12-01), Sawamura et al.
patent: 4719187 (1988-01-01), Bardhan et al.
61-261270, Nov. 1986 Japan.
62-17076, Jan. 1987 Japan.
62-52180, Mar. 1987 Japan.
62-105961, May 1987 Japan.

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