| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a lightweight sintered compact having a large size of shape or a complicated irregular surface. SOLUTION: An inorganic component (its basic materials are a mineral containing natural glassy material such as Shirasu or the like or feldspar and bentonite and clay, and a foaming agent is added) which foams at burning for porcelain and an alumina-siliceous balloon whose refractoriness is higher than that of the inorganic component and having a shrinkage property when burned are mixed. The mixing ratio is 70-40 wt% for the former and 30-60 wt% for the later. A formed compact is formed using the mixed raw material and then burned. The forming is performed by a dry pressing method after the inorganic component is wet-pulverized, dried, powdered and mixed with the balloon or by a molding method after the inorganic component is wet-pulverized, slurried and mixed with the balloon. Whichever method can be selected. COPYRIGHT: (C)2004,JPO
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