Piezoelectric and dielectric properties of CeO2-doped Bi0.5Na0.44K0.06TiO3 lead-free ceramics
Piezoelectric and dielectric properties of CeO2-doped Bi0.5Na0.44K0.06TiO3 lead-free ceramics
复制标题
CeO2掺杂Bi0.5Na0.44K0.06TiO3无铅陶瓷的压电和介电性能
DOI：
10.1016/j.ceramint.2005.08.001
复制
发表时间：
2007-01-01
影响因子：
5.2
通讯作者：
Sun, Huajun
中科院分区：
文献类型：
--
作者：
Li, Yueming;Chen, Wen;Sun, Huajun
采用常规陶瓷工艺合成了CeO2掺杂无铅Bi0.5Na0.44K0.06TiO3压电陶瓷(0-1.0 wt%)。 X射线衍射表明，烧结过程中CeO2扩散到Bi0.5Na0.44K0.06TiO3晶格中形成固溶体，但并未改变Bi0.5Na0.44K0.06TiO3中菱面体相。介电常数 epsilon(r) 和介电损耗 tan δ 测量的温度依赖性表明，固溶体经历了从铁电到反铁电和反铁电到顺电的两个相变，这可以通过不同温度下的 P-E 磁滞回线来证明。含有0.2 wt% CeO2的样品显示，矫顽场E-c从8.22降低到4.76 kV/mm，残余极化P-r从37.2降低到30.0 μ C/cm(2)，对应于压电常数d(33)提高到132 pC/N，机电耦合因子k(p)提高到27.8%。 (c) 2005 Elsevier Ltd 和 Techna Group S.r.l.版权所有。
CeO2-doped lead-free Bi0.5Na0.44K0.06TiO3 piezoelectric ceramics (0-1.0 wt%) were synthesized by conventional ceramics technique. X-ray diffraction shows that CeO2 diffuses into the lattice of Bi0.5Na0.44K0.06TiO3 to form a solid solution, but does not change the rhombohedral phase in Bi0.5Na0.44K0.06TiO3 during sintering. The temperature dependence of dielectric constant epsilon(r) and dielectric loss tan delta measurement reveals that the solid solutions experience two phase transitions from ferroelectric to anti-ferroelectric and anti-ferroelectric to paraelectric, which can be proved by P-E hysteresis loops at different temperatures. The specimen containing 0.2 wt% CeO2 shows that the coercive field E-c decreases from 8.22 to 4.76 kV/mm while the remnant polarization P-r decreases from 37.2 to 30.0 mu C/cm(2), corresponding to the enhancement of piezoelectric constant d(33) of 132 pC/N and electromechanical coupling factor k(p) of 27.8%. (c) 2005 Elsevier Ltd and Techna Group S.r.l. All rights reserved.