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发明公开
CN101374782A 压电陶瓷组合物 有权 复审申请

压电陶瓷组合物
摘要：
本发明提供一种压电陶瓷组合物，其以通式{(1－x)(K1－a－bNaaLib)m(Nb1－c－dTacSbd)O3－x(K1/4Na1/4M31/2)M4O3}表示，并且M3包含选自Yb、Y、In、Nd、Eu、Gd、Dy、Sm、Ho、Er、Tb及Lu中的至少一种金属元素，M4包含选自Ti、Zr及Sn中的至少一种金属元素，并且前述x、a、b、c、d、m分别满足0.001≤x≤0.1、0≤a≤0.9、0≤b≤0.3、0≤a+b≤0.9、0≤c≤0.5、0≤d≤0.1、0.7≤m≤1.3。由此就可以消除难烧结性而获得足够的所需的压电特性，并且能够以适于批量生产的程度确保足够的烧成温度范围，而且还可以抑制极化不良的产生而提高成品率。
摘要（英）：

The invention provides a piezoelectric ceramic composition of the general formula {(1-x)(K1-a-bNaaLib)m(Nb1-c-dTacSbd)O3-x(K1/4Na1/4M31/2)M4O3} wherein M3 consists of at least one metal element selected from among Yb, Y, In, Nd, Eu, Gd, Dy, Sm, Ho, Er, Tb and Lu; M4 consists of at least one metal element selected from the group consisting of Ti, Zr and Sn; and x, a, b, c, d and m satisfy the relationships: 0.001<=x<=0.1, 0<=a<=0.9, 0<=b<=0.3, 0<=a+b<=0.9, 0<=c<=0.5, 0<=d<=0.1 and 0.7<=m<=1.3. Accordingly, sintering difficulty can be resolved, and satisfactory desired piezoelectric performance can be attained. Further, a sintering temperature range satisfactory to such an extent of being suitable for mass production can be ensured, and the occurrence of polarization failure can be suppressed to thereby achieve an enhancement of product yield.

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