| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing a high-density lead zirconium titanate-based sintered body having uniform crystalline phases and containing a large amount of high-density PbO. <P>SOLUTION: The method for producing the lead zirconium titanate-based sintered body comprises: producing a pre-sintered body by sintering raw material powder of lead zirconium titanate mixed in a stoichiometric composition at a temperature of 900°C or higher and 1,200°C or lower; pulverizing the pre-sintered body; producing lead-excessive mixed powder by adding PbO powder to the powder obtained by pulverizing the pre-sintered body; and sintering the lead-excessive mixed powder at a temperature lower than the sintering temperature of the pre-sintered body. By separating the sintering process into two stages, a high-density (e.g. ≥95%) PZT sintered body constituted only of the PZT having the stoichiometric composition in which PbZrO<SB>3</SB>, PbTiO<SB>3</SB>, ZrO<SB>2</SB>, TiO<SB>2</SB>, PbO, and other intermediate compounds are absent, and the excessive PbO can be obtained. <P>COPYRIGHT: (C)2009,JPO&INPIT |
