| 摘要 |
PROBLEM TO BE SOLVED: To provide a (K1-xNx)NbO3 piezoelectric ceramic composition having a high mechanical quality coefficient Qm, and low initial value of the dielectric loss tanδ and to provide a (K1-xNax)NbO3 piezoelectric ceramic composition having excellent long-term stability of the dielectric loss tanδ. SOLUTION: The piezoelectric ceramic composition has the composition expressed by general formula (K1-xNax)1-yAgy}NbO3-z[Maα+][O2-]α/2, wherein x, y, z satisfy 0<=x<1, 0<=y<=0.1, 0<=z<=0.05 and y+z>0. In the formula, M is at least one kind of metal element selected from Mn, Mg, In, Si, Ga and Sb and α is the average valance of the metal element M. |
