| 摘要 |
PURPOSE:To easily obtain high-density through holes with regularity by bundling specific plural bar-shaped bodies, pressure-welding the bar-shaped bodies together while performing pressing to the extent that spaces among the bar-shaped bodies or spaces formed in the bar-shaped bodies, respectively, are not completely crushed, and then carrying out burning. CONSTITUTION:Ceramic raw material, such as alumina, is extruded into long-size bar-shaped bodies of the same cross-sectional form, and bar-shaped bodies 1 having cross-sectional form of circular shape, square shape, etc., are prepared. Subsequently, plural bar-shaped bodies 1 are bundled with regularity so as to be formed into a bundle 4 in which spaces 2 are formed among mutual bar-shaped bodies 1. On the other hand, in the case of the bar-shaped bodies 1 having cross-sectional form forming no spaces 2, the bar-shaped bodies 1 having through holes 3 in respective centers are bundled so that the closest packing is reached, by which the bundle 4 is prepared. Then, this bundle 4 is placed into a rubber bag, etc., and pressure welding is applied to the mutual bar-shaped bodies 1 by exerting pressing while carrying out control to the extent that the spaces 2 or the through holes 3 are not completely crushed, by which a pressure welded body is obtained. By burning this pressure welded body, a suction pad made of ceramics in which plural through pores running in a longitudinal direction and having the same cross-sectional form are formed with regularly can be produced. |
