Huang Chien-Chih, Vittayakorn Naratip, Cann David P
Department of Materials Science, School of Mechanical, Industrial, and Manufacturing Engineering, Oregon State University, Corvallis, OR 97331, USA.
IEEE Trans Ultrason Ferroelectr Freq Control. 2009 Jul;56(7):1304-8. doi: 10.1109/TUFFC.2009.1186.
Lead-free piezoelectric ceramics based on chiBi(Zn(1/2)Ti(1/2))O3-(1-chi)(Bi(1/2)K(1/2))TiO3 were obtained via solid state processing techniques. A single perovskite phase with tetragonal symmetry was obtained for Bi(Zn(1/2)Ti(1/2))O3 (BZT) substitutions up to 20 mol%. The maximum density was 97.1% at the composition of chi = 0.1. The dielectric measurement indicated that the transition temperature decreased linearly with increasing BZT content. The P-E loops revealed an increase in remanent polarization (P(r)) with the addition of BZT. The maximum planar coupling coefficient, kappa(p), for the chi = 0.1 composition was 21.6 and the piezoelectric coefficient, d33, for chi = 0, chi = 0.05, and chi = 0.1 was 108, 185, and 235 pm/V, respectively. Overall, the dielectric and piezoelectric properties showed significant improvement when BZT was added.
通过固态加工技术制备了基于χBi(Zn(1/2)Ti(1/2))O3-(1-χ)(Bi(1/2)K(1/2))TiO3的无铅压电陶瓷。当Bi(Zn(1/2)Ti(1/2))O3（BZT）替代量高达20摩尔%时，获得了具有四方对称性的单一钙钛矿相。在χ = 0.1的组成下，最大密度为97.1%。介电测量表明，转变温度随BZT含量的增加而线性降低。P-E回线显示，随着BZT的加入，剩余极化强度（Pr）增加。对于χ = 0.1的组成，最大平面耦合系数κ(p)为21.6，对于χ = 0、χ = 0.05和χ = 0.1，压电系数d33分别为108、185和235 pm/V。总体而言，添加BZT后，介电和压电性能有显著改善。
