| 摘要 |
A piezoelectric ceramic includes a main constituent represented by the general formula {(1−x) (K1-a-bNaaLib)(Nb1-cTac)O3}−xM2M4O3}, and as accessory constituents, 2α mol of Na, (α+β) mole of an M4′ element, and γ mol of Mn with respect to 100 mol of the main constituent, where 0.1≦α≦β, 1≦α+β≦10, and 0≦γ≦10, M2 is Ca, Ba, and/or Sr, the M4 element and the M4′ element are Zr, Sn, and/or Hf, 0≦x≦0.06, 0≦a≦0.9, 0≦b≦0.1, and 0≦c≦0.3. Even in the case of using Ni as the main constituent in an internal electrode material of a piezoelectric element and carrying out co-firing, favorable piezoelectric properties can be obtained without defective polarization. |
| 主权项 |
1. A piezoelectric ceramic composition comprising
a main constituent represented by the compositional formula
{(1−x)(K1-a-bNaaLib)(Nb1-c-dTacSbd)O3}−xM2M4O3}wherein M2 is at least one member of the group consisting of Ca, Ba, and Sr, M4 is at least one member of the group consisting of Zr, Sn, and Hf, 0≦x≦0.06, 0≦a≦0.9, 0≦b≦0.1, 0≦c≦0.3, and 0≦d≦0.05, and
as accessory constituents, 2α mol of Na, (α+β) mol of M4′, γ mol of Mn and δ mol of M3, with respect to 100 mol of the main constituent, wherein M4′ is at least one member of the group consisting of Zr, Sn, and Hf, M3 is at least one member selected from the group of Sc, In, Yb, Y, Nd, Eu, Gd, Dy, Sin, Ho, Er, Tb, Lu, La, and Pr, 0.1≦α≦β, 1≦α+β≦10, 0≦γ≦10, and 0≦δ≦5. |
