Patent ID: 7910016
Filing Date: 2011-03-22
Classification: B32B,C04B,H01L

Abstract:
1. A piezoelectric ceramic composition comprising: a main component having a general formula of wherein M1 is at least one metallic element selected from the group consisting of K and Na, M2 is at least one metallic element selected from the group consisting of Ti, Zr and Sn, 0.005≦x≦0.5, 0≦a≦0.9, 0≦b≦0.3, 0≦a+b≦0.9, 0≦c≦0.5, 0≦d≦0.1, 0.9≦m≦1.1, and 0.9≦n≦1.1; and at least one specific element selected from the group consisting of In, Sc, Y, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb and Lu per 100 mols in the form of an oxide in a total amount of about 0.1 to 10 mols per 100 mols of the main component.