| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that the cooling effect is insufficient in a known heat sink, and to provide a heat sink that can be manufactured in a simple production process at a low cost. SOLUTION: The porous ceramic heat sink mainly comprises a heat radiation layer 1 and a heat conduction layer 2. The heat radiation layer utilizes the principle of microcosmic chemical liquid phase change, forms the microcell structure of a ceramic powder by nonuniformly dispersing milky-liquid-like slurry, performs sintering for forming the heat radiation layer with a porous structure of a hollow crystal before bonding the submicron powder together, and has the heat conduction layer on a surface coming into contact with a heat source. The heat conduction layer absorbs heat in the heat source and further adds forced convection current conditions with air as a medium by the high surface area of the hollow crystal porous structure of the heat radiation layer for improving cooling capability in the heat sink. COPYRIGHT: (C)2004,JPO&NCIPI
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