Piezoelectric ceramic and manufacturing method therefor
AssigneeMurata Manufacturing Co., Ltd.
InventorsAkihiro Nakamichi, Koichi Hayashi, Akira Ando
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Abstract
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 WO3 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 μm to 0.8 μm.
Claims14
A piezoelectric ceramic comprising:
- a primary component comprising lead titanate;
- and
- about 0.1 to 5% by weight of tungsten in terms of WO3 relative to said primary component,
- wherein about 75% or more of crystal particles constituting said piezoelectric ceramic have particle diameters distributed in the range of about 0.2 μm to 0.8 μm.
A manufacturing method for a piezoelectric ceramic, comprising firing a piezoelectric ceramic material at a temperature of more than about 1,080° C. and less than about 1,150° C., wherein said piezoelectric ceramic material comprises:
- a primary component comprising lead titanate;
- and
- about 0.1 to 5% by weight of tungsten in terms of WO3 relative to said primary component.
Dependencies are inferred from the claim text.