| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piezoelectric ceramic composition capable of being sintered at low temperatures and in a low-oxygen reductive atmosphere and capable of attaining a sufficient displacement even at high voltages of 1 kV/mm or more. <P>SOLUTION: The piezoelectric ceramic composition includes a composite oxide, as a main constituent thereof, represented by the following composition formula: Cu and/or Ag, each as a first additive, Cu being included in a content α, in terms of Cu<SB>2</SB>O, falling within a range 0<α≤0.5% by mass and Ag being included in a content β, in terms of Ag<SB>2</SB>O, falling within a range 0<β≤0.4% by mass; and at least one of Ta, Nb, W and Sb, as a second additive, in a content γ, in terms of oxide, falling within a range 0<γ≤0.6% by mass, in relation to the main constituent; wherein, composition formula: Pb<SB>a</SB>[(Zn<SB>1/3</SB>Nb2<SB>2/3</SB>)<SB>x</SB>Ti<SB>y</SB>Zr<SB>z</SB>]O<SB>3</SB>, where 0.96≤a≤1.03, 0.005≤x<0.05, 0.42≤y≤0.53, 0.45≤z≤0.56, and x+y+z+1. <P>COPYRIGHT: (C)2008,JPO&INPIT |
