Patent ID: 7595006
Filing Date: 2009-09-29
Classification: C01G,C01P,C04B,H01L

Abstract:
1. A piezoelectric ceramic composition having the composition formula wherein Me is at least one element selected from the group consisting of Ba, Sr and Ca; a, b, c, d, x and z satisfy the inequalities 0.975≦a≦0.998, 0≦b≦0.05, 1<d≦1.40, and 0.39≦x≦0.47; and c and z are located in a region surrounded by lines connecting Point A (z=0.25, c=0.1), Point B (z=0.25, c=0.85), Point C (z=0.1, c=0.6), Point D (z=0.075, c=0.5), Point E (z=0.05, c=0.2), and Point F (z=0.05, c=0.1) or located on the lines on a graph of z and c.