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Method of making and ceramic articles with multiple regions of distinct density

United States Patent

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July 3, 2012
View the Complete Patent at the US Patent & Trademark Office
A method for producing ceramic articles with multiple distinct regions of density by blending pore formers of different types or amounts with ceramic particles to create multiple pore former/ceramic particle mixtures. The mixtures are placed in a divided die cavity, divider removed and subjected to compaction under pressure to produce a compacted billet. The compacted billet is thermally processed to volatilize organics from the billet and sinter the billet, creating a cohesive billet of ceramic having two or more regions of density.
12/ 543,540
August 19, 2009
310/358 252/62.9PZ252/62.9R310/311310/339310/357
H01L 41/187 (20060101)
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT The United States Government has certain rights in this invention pursuant to Department of Energy Contract No. DE-AC04-94AL85000 with Sandia Corporation.