| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piezoelectric ceramic composition which has high heat resistance and large piezoelectric strain constant, and is easily manufactured. <P>SOLUTION: The piezoelectric ceramic composition contains Na, Bi, Ti and Co and each content ratio of Na, Bi, Ti and Co expressed in terms of oxide satisfies following composition range (1): aNa<SB>2</SB>O-bBi<SB>2</SB>O<SB>3</SB>-cTiO<SB>2</SB>-dCoO (where each of (a), (b), (c) and (d) expresses the molar ratio and is respectively 0.030≤a≤0.042, 0.330≤b≤0.370, 0.580≤c≤0.620, 0<d≤0.017 and a+b+c+d=1). <P>COPYRIGHT: (C)2007,JPO&INPIT |
