| 摘要 |
PURPOSE:To obtain a heat sink which is light and excellent in heat radiation by bonding covers under compression to a tubular body molded out of paste of powder of ceramic, sintering them into one body, enclosing a working liquid therein, and providing later a metallized layer on the surface of one cover. CONSTITUTION:A prescribed amount of a binding agent and a plasticizer are added to Al2O3, SiO2 and MgO, a mixture thus prepared is kneaded and molded by extrusion into a long tube having cavities with many capillary grooves 3 formed in the longitudinal direction of inside walls thereof, and a tubular body 1 is prepared by cutting the tube. Meanwhile, cover 4 and 5 are prepared by punching boards made of the same material, the inside surfaces thereof are coated with paste of powder of a prescribed component ratio of Al2O3, SiO2 and MgO which form porous sintered layers 7 at a sintering temperature, the covers 4 and 5 thus prepared are bonded under heat and compression to the tubular body 1, and they are sintered into one body. A metallized layer 9 is applied onto the top surface of a container thus prepared, a working liquid such as water is injected into the inside of the sintered body through a pipe 8 provided at the tubular body or the cover, and later the pipe 8 is stopped up. A heat sink prepared in this way is excellent in heat radiation, and it is also excellent in its bonding property, since it has the metallized layer 9. |
