Aluminum nitride sintered body and process for preparation there

Details Aluminum nitride sintered body and process for preparation there Aluminum nitride sintered body and process for preparation there

1992-01-17

1993-10-05

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501152, 501153, C04B 3558

Patent

active

052504786

ABSTRACT:
Disclosed is an aluminum nitride sintered body comprising aluminum nitride and a sintering aid, wherein the sintering aid is composed mainly of at least one component selected, as the oxide, from the group consisting of Yb.sub.2 O.sub.3 and Er.sub.2 O.sub.3, and the sintered body contains up to 0.5% by weight of Yb and/or Er as the metal and has a density of 3.2 to 3.3 g/cm.sup.3 and a heat conductivity of at least 170 W/m.multidot.k.
If a CaO component is incorporated as the second sintering aid in an amount of up to 0.1% by weight, the heat conductivity is further increased.

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patent: 5077245 (1991-12-01), Miyahara

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