The Piezoelectric Properties of La2O3 Doped (Bi1/2Na1/2)TiO3–(Bi1/2K1/2)TiO3 Ceramics
The Piezoelectric Properties of La2O3 Doped (Bi1/2Na1/2)TiO3–(Bi1/2K1/2)TiO3 Ceramics
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DOI：
10.1080/00150190701536978
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发表时间：
2007-10
期刊：
影响因子：
0.8
通讯作者：
K. Yoshii;Y. Hiruma;M. Suzuki;H. Nagata;T. Takenaka
中科院分区：
文献类型：
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作者：
K. Yoshii;Y. Hiruma;M. Suzuki;H. Nagata;T. Takenaka
研究了x（Bi 1/2Na 1/2）TiO 3-（1-x）（Bi 1/2K 1/2）TiO 3 + La 2 O 3 y wt% [BNKTx + La 2 O 3 y wt%; x = 0. 50，0. 70，y = 0- 0. 6]固溶体的压电性能，着重研究了压电常数d33和退极化温度Td.介电常数随La_2O_3含量（y）的增加而增加。在BNKT 0.70 + La 2 O3 0.2wt%中，机电耦合系数k33（0.493）和d33（153 pC/N）最高。BNKT 0.70 + La 2 O3 y wt%在210-220°C范围内，当y = 0 ~ 0.3时，Td几乎相同，当y ≥ q 0.4时，Td降低。BNKT 0.70 + La 2 O3 0.2wt%（d33 = 153 pC/N，Td = 219°C）是一种很好的致动器材料。
The piezoelectric properties of a solid solution, x(Bi1/2Na1/2)TiO3-(1-x)(Bi1/2K1/2) TiO3 + La2O3 y wt% [BNKTx + La2O3 y wt%; x = 0.50, 0.70, y = 0–0.6] were investigated, focusing on piezoelectric constant, d 33, and depolarization temperature, T d. The dielectric constant increased with increasing La2O3 content (y). The highest electromechanical coupling factor, k 33 (0.493) and the highest d 33 (153 pC/N) was obtained in BNKT0.70 + La2O3 0.2wt%. The T d of BNKT0.70 + La2O3 y wt% was almost the same with y = 0–0.3 at 210–220°C and decreased with y ≥ q 0.4. BNKT0.70 + La2O3 0.2 wt% (d 33 = 153 pC/N and T d = 219°C) is a good candidate for practical use in actuators.