Murata Manufacturing Co., Ltd.

Masataka Kida

Yoshiaki Kohno

Masayoshi Katsube

Kazunari Okada

Kenichi Nada

Akinobu Takamura

Akihito Okuda

The present invention relates to a method for producing a lead zirconate titanate-based ceramic powder containing uniform, fine lead zirconate titanate, using a solid-phase method. The method includes the steps of mixing a lead oxide powder, a zirconium oxide powder, and a titanium oxide powder to form a mixed base powder; and heat-treating the mixed base powder so that lead oxide in the lead oxide powder and titanium oxide in the titanium oxide powder react to produce lead titanate, and that unreacted lead oxide not used in the reaction, the lead titanate produced by the reaction, and zirconium oxide in the zirconium oxide powder react to produce the lead zirconate titanate-based ceramic powder containing lead zirconate titanate.

Method of making lead zirconate titanate-based ceramic powder, piezoelectric ceramic and method for making same, and piezoelectric ceramic element

A piezoelectric ceramic material having excellent mechanical strength, excellent resistance to chemicals, and excellent moisture resistance. The piezoelectric ceramic material contains lead oxide, wherein a closed region observed under a transmission electron microscope and defined by a plurality of crystal grains which constitute the sintered piezoelectric ceramic material and are adjacent to one another is predominantly formed of an amorphous phase.

Piezoelectric ceramic material, electronic part using the ceramic

A piezoelectric ceramic comprising lead titanate as a primary component, wherein the primary component contains a titanium oxide crystalline phase. Methods for producing the ceramic, and piezoelectric oscillators making use of the ceramic are also disclosed.

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Omihachiman, Japan

Masataka Kida