| 摘要 |
A piezoelectric member of uniaxial crystal or uniaxial crystal and the piezoelectric member has perovskite type oxide described to be ABO<SUB>3 </SUB>in a general formula with a main component of the A being Pb and a main component of the B containing at least three kinds of elements selected from the group consisting of Mg, Zn, Sc, In, Yb, Ni, Nb, Ti and Ta and film thickness of the piezoelectric member is not less than 1 mum and not more than 10 mum and the piezoelectric member fulfills a predetermined conditions on relative dielectric constant or Curie temperature.
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