Increasing a1n thermal conductivity via vapor-phase carbon

Details Increasing a1n thermal conductivity via vapor-phase carbon Increasing a1n thermal conductivity via vapor-phase carbon

C - Chemistry, Metallurgy

04

B

261/1

C04B 35/58 (2006.01)

Patent

CA 2000839

Abstract of the Disclosure A method for producing densified aluminum nitride articles having enhanced thermal conduc- tivity is disclosed. The method comprises the steps of forming a powder compact comprising aluminum nitride alone or in combination with other ceramic compounds, adding a densification aid to the com- pact, and at least partially densifying the compact via sintering or hot pressing to provide a semi- dense article. This semi-dense article is there- after exposed to an atmosphere containing vapor phase carbon for a period of time sufficient to allow the vapor phase carbon to reduce the level of oxygen contained within the article. The article thus produced is a dense aluminum nitride article having a high thermal conductivity.

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