| 摘要 |
A piezoelectric body is provided, including (Bi½Na½)TiO3 as a main component which is obtained by forming and sintering powders. A heterogeneous phase, other than (Bi½Na½)TiO3 system perovskite phase, in the powders has a peak ratio relative to the strongest peak of the perovskite phase of 5% or lower as determined by powder X-ray diffraction. As a result, the frequency of the dielectric breakdown in a sintered piezoelectric body during polarization can be dramatically reduced to 0.1 to 2% of that experienced in prior art compositions The manufacturing yield can be increased, manufacturing costs can be reduced, and the overall reliability of products manufactured therefrom can be improved.
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