| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric ceramic which has improved displacement magnitude of the piezoelectric ceramic and in which no Pb is used in view of the environment, and a piezoelectric device using the same.SOLUTION: A piezoelectric ceramic includes potassium-sodium niobate as a major component, where a carbon content after calcination is 55-1240 mass ppm. The potassium-sodium niobate is a composition expressed by formula (1): (K----NaLiBaSr)(Nb--TaZr)O(1) (x, y, z, w, v, u, and m satisfy: 0.4<x≤0.7, 0.02≤y≤0.11, 0.5≤x+y<0.75, 0<z≤0.28, 0<w≤0.02, 0.02≤v≤0.1, 0.02≤u≤0.11 and 0.95≤m<1.2). |
