초록 ▼

A process for producing a carbon foam heat sink is disclosed which obviates the need for conventional oxidative stabilization. The process employs mesophase or isotropic pitch and a simplified process using a single mold. The foam has a relatively uniform distribution of pore sizes and a highly alig

A process for producing a carbon foam heat sink is disclosed which obviates the need for conventional oxidative stabilization. The process employs mesophase or isotropic pitch and a simplified process using a single mold. The foam has a relatively uniform distribution of pore sizes and a highly aligned graphic structure in the struts. The foam material can be made into a composite which is useful in high temperature sandwich panels for both thermal and structural applications. The foam is encased and filled with a phase change material to provide a very efficient heat sink device.

대표청구항 ▼

[ What is claimed is:] [1.] A process of producing a carbon foam heat sink comprising:selecting an appropriate mold shape;introducing pitch to an appropriate level in said mold;purging air from said mold to form a vacuum;heating said pitch to a temperature sufficient to coalesce said pitch into a li

[ What is claimed is:] [1.] A process of producing a carbon foam heat sink comprising:selecting an appropriate mold shape;introducing pitch to an appropriate level in said mold;purging air from said mold to form a vacuum;heating said pitch to a temperature sufficient to coalesce said pitch into a liquid;releasing said vacuum and backfilling an inert fluid at a static pressure up to about 1000 psi;heating said pitch to a temperature sufficient to cause gases to evolve and form a carbon foam;heating said carbon foam to a temperature sufficient to coke the pitch;cooling said carbon foam to room temperature and simultaneously releasing said inert fluid;at least partially encasing said carbon foam; andat least partially filling porous regions of said carbon foam with a phase change material.