| 摘要 |
PURPOSE:To produce the subject sintered material preventing cracking, bad retention, etc., after sintering, having excellent dimensional accuracy, by inserting an inner molded article of uncalcined inorganic powder into an outer molded article of uncalcined inorganic powder having a higher calcination shrinkage factor than that of the inner molded article. CONSTITUTION:Uncalcined inorganic powder is molded to give an outer molded article 1. An inner molded article 2 having a lower calcination shrinkage factor than that of molded article 1, obtained by molding uncalcined inorganic powder is inserted into the interior of the outer molded article, the molded articles 1 and 2 are burnt at a given temperature for a fixed time and integrated. |
