Patent ID: 7948154

Claim:
A piezoelectric substance which is made of oxide with perovskite type structure of ABO 3 , where a principal component of A is Pb, and principal components of B contain at least two kinds of elements among Nb, Mg, Zn, Sc, Cd, Ni, Mn, Co, Yb, In, and Fe, and Ti, and is a uniaxial orientation crystal or a single crystal which has an a-domain and a c-domain of tetragonal, wherein the oxide is expressed in (Pb k ,α l ) x (Mg m , Nb n , Ti O , β p ) y O 3 (where, 1≦x/y<1.5, k+1=1, 0.7≦k≦1, 0≦1≦0.3, m+n+o+p=1, 0.1<m<0.3, 0.3<n<0.5, 0.2<o<0.4, and 0≦p<0.3 are fulfilled, α contains any one kind of element selected from among La, Ca, Ba, Sr, Bi, and Sb, and β contains any one kind of element selected from among Pb, Sc, In, Yb, Ni, Ta, Co, W, Fe, and Sn).