Murata Manufacturing Co., Ltd.

Akihiro Nakamichi

Akira Ando

Koichi Hayashi

A piezoelectric ceramic for producing a piezoelectric element having sufficient strength and hardness in spite of compactness is provided. The piezoelectric ceramic contains lead titanate as a primary component and about 0.1 to 5% by weight of tungsten in terms of WO relative to the primary component, and about 75% or more of crystal particles constituting the piezoelectric ceramic have particle diameters distributed in the range of about 0.2 &mgr;m to 0.8 &mgr;m.

Piezoelectric ceramic and manufacturing method therefor

A piezoelectric ceramic material which can suppress segregation of a W compound or a W oxide in W-containing sintered PbTiO and a piezoelectric transducer employing the ceramic material. The ceramic material contains lead titanate as a primary component; an Mn-containing oxide or an Mn-containing compound and a W-containing compound or a W-containing oxide as secondary components; and an Si-containing oxide or an Si-containing compound as an additional component. Alternatively, the piezoelectric ceramic material contains a primary component containing PbTiO and Pb(Mn W )O and additionally SiO or PbSiO .

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Omihachiman, Japan

Akihiro Nakamichi