| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric ceramic composition free of Pb, small in the diameter of crystal particle, large in a grade coefficient and a mechanical Q (a coefficient expressing the sharpness of resonance), and large in frequency constant. SOLUTION: This piezoelectric ceramic composition is represented by the general formula, (LixNa1-x-yKy)z-2wMa2wNb1-wMbwO3, wherein, 0.03<=x<=0.2, 0<=y<=0.2; 0.98<=z<=1; 0.001<=w<=0.05; Ma is at least one of bivalent metal elements; and Mb is at least one of trivalent metal elements. |
