Preparation of sintered aluminum nitride

Details Preparation of sintered aluminum nitride Preparation of sintered aluminum nitride

1991-02-26

1991-10-29

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501 96, G04B 3558

Patent

active

050616641

ABSTRACT:
Sintered aluminum nitride is prepared by adding a sintering aid to aluminum nitride powder and firing the mixture. The use of a rare earth element oxide mixture comprising 40-80 wt % of Y.sub.2 O.sub.3, 5-15 wt % of Dy.sub.2 O.sub.3, 2-10 wt % of Er.sub.2 O.sub.3, and 2-10 wt % of Yb.sub.2 O.sub.3 as the sintering aid provides sintered aluminum nitride having high thermal conductivity with minimal grain boundary precipitation and thus suitable as heat dissipating substrates.

REFERENCES:
patent: 4719187 (1988-01-01), Bardham et al.
patent: 4746637 (1988-05-01), Kasori et al.
patent: 4770453 (1988-09-01), Horiguchi et al.
patent: 4883780 (1989-11-01), Kasori et al.
patent: 4950435 (1990-08-01), Taniguchi et al.
patent: 5001089 (1991-03-01), Kasori et al.

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