| 摘要 |
A powder of oxide which is a material for dielectric ceramics including perovskite-type double oxide containing lead, and a process for producing dielectric ceramics using the powder. In the process of this invention, perovskite-type double oxide containing lead are initially produced by means of hydrothermal reaction, and the powder is heat-treated at 500 DEG to 1000 DEG C. Consequently, the specific surface area of the powder becomes 20 m2/g or less. The powder is mixed with binder and compressed, molded and debinded, and consequently, the compact attains 50% or more of theoretical density. Thereafter, the compact is sintered. As a result, the process of manufacture according to the present invention is capable of producing dielectric ceramics, wherein deformation and cracks do not occur.
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