| 摘要 |
PURPOSE:To acquire an alumina supermicrogrid of an excellent thermal and electrical conductivity in a very low temperature, by forming a porous alumina layer on an aluminum surface by electrochemical oxidation, and dissolving chemically the faces at the bottoms of pores of the exfoliated membrane to make penetrated pores. CONSTITUTION:A porous alumina layer is formed on an aluminum surface, by grinding an aluminum plate or by vacuum evaporating aluminum over a solid material, then oxidizing it electrochemically in an electrolyte at below pH5 or above pH8. Then the membrane of the porous alumina layer is exfoliated with an exfoliating agent, a metallic etching agent, or an electrochemical means, attached to metallic mesh, and then the surfaces of the bottoms of the membrane pores are dissolved or cut off to be penetrated pores. Furthermore, the mesh with the penetrated pores is vacuum evaporated with a metal or carbon to improve its thermal and electrical conductivity. |
