Dense sintered bodies of nitride materials

Details Dense sintered bodies of nitride materials Dense sintered bodies of nitride materials

C - Chemistry, Metallurgy

04

B

261/1

C04B 35/58 (2006.01) C04B 35/581 (2006.01) C04B 35/584 (2006.01) C04B 35/593 (2006.01)

Patent

CA 1270264

Abstract of the Disclosure This invention is directed to the production of nitride-based ceramic bodies selected from the group of AlN and Si3N4 which can be sintered to near theoretical densities at temperatures at least 200°C lower than those required for the pure materials. Such bodies are densified through the addition of a metal fluoride selected from the group of aluminum, barium, calcium, strontium, yttrium, the lanthanide rare earth metals, and mixtures thereof. Up to 80% by weight of said metal fluoride may be included but, generally, such additions will be held between 5-30% by weight. AlN bodies exhibiting very high thermal conductivity can be prepared by sintering with a metal fluoride selected from the group of barium, calcium, strontium, yttrium, the lanthanide rare earth metals, and mixtures thereof.

550784

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