Process for making porous graphite and articles produced therefrom
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United States of America Patent
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Aug 17, 2004
Grant Date -
Feb 20, 2003
app pub date -
Aug 9, 2001
filing date -
Aug 9, 2001
priority date (Note) -
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Abstract
A process for producing solid, porous graphites which provides a more uniform density gradient throughout the ultimate product. The process utilizes a pressure drop during processing in order to induce boiling and varies the processing pressure between an initial pressure which exceeds 1000 psig and a final processing pressure which generally exceeds the initial pressure. The particular processing techniques employed allow additional viscosity manipulation as well as improved density gradient characteristics in the ultimate product. The final products have bulk thermal conductivities in the range from 90-300 W/mK with apparent densities ranging from about 0.678 g/cc-1.5 g/cc
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