Ferroelectric and piezoelectric properties of Aurivillius phase intergrowth ferroelectrics and the underlying materials design
Ferroelectric and piezoelectric properties of Aurivillius phase intergrowth ferroelectrics and the underlying materials design
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DOI：
10.1002/pssa.201000077
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发表时间：
2011-05
期刊：
影响因子：
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通讯作者：
Zhiguo Yi;Zhiguo Yi;Yongxiang Li;Yun Liu
中科院分区：
文献类型：
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作者：
Zhiguo Yi;Zhiguo Yi;Yongxiang Li;Yun Liu
Ferroelectric and piezoelectric properties of the La‐doped intergrowth Aurivillius phase ceramics Bi5−xLaxTiNbWO15 and Bi7−xLaxTi4NbO21 (x = 0.00–1.75) were studied. It was found that the La doping is in favour of the domain switching. Owing to the impact of defects, the P–E hysteresis loops of the La‐doped Bi5TiNbWO15 ceramics are un‐symmetrical and the piezoelectric coefficients are quite low. Enhanced ferro‐/piezoelectric properties, such as 2Pr of 24.4 µC/cm2 (x = 0.50) and d33 of 16.6 pC/N (x = 0.75), were obtained in the Bi7−xLaxTi4NbO21 ceramics. The high temperature electrical behaviour indicates that the Bi5−xLaxTiNbWO15 ceramics are semiconducting whereas the La‐doped Bi7Ti4NbO21 ceramics are worthy to be further studied toward high temperature piezoelectric applications. Finally, the underlying materials design is discussed.
