Electrostrictive and relaxor ferroelectric behavior in BiAlO3-modified BaTiO3 lead-free ceramics
Electrostrictive and relaxor ferroelectric behavior in BiAlO3-modified BaTiO3 lead-free ceramics
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DOI：
10.1063/1.4794022
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发表时间：
2013-03
影响因子：
3.2
通讯作者：
Shaoying Zheng;Erika Odendo;Laijun Liu;Danping Shi;Yanming Huang;Longlong Fan;Jun Chen;L. Fang-
中科院分区：
文献类型：
--
作者：
Shaoying Zheng;Erika Odendo;Laijun Liu;Danping Shi;Yanming Huang;Longlong Fan;Jun Chen;L. Fang-
在室温下用X射线衍射和拉曼光谱测定了（1-x）BaTiO 3-xBiAlO 3（x = 0、0.02、0.05、0.08和0.1）陶瓷的晶体结构，发现随着x的增加，从四方体到菱方体的相变。在不同频率下研究了介电性能随温度的变化，结果表明，随着x的增加，相变温度（Tm）降低。弛豫行为由频率和温度依赖的介电常数观察。洛伦兹型二次定律被用来表征在1 MHz高温斜率的Tm附近的介电常数峰。在x = 0.05和x = 0.1时，介电常数峰的温度Tm非常符合Vogel-Fulcher定律。在室温下显示出极化磁滞回线和电致伸缩。当x = 0.1时，样品表现出可忽略的磁滞回线和微妙的线性特征，这是一种很有前途的换能器材料。
The crystal structure of (1−x)BaTiO3-xBiAlO3 (x = 0, 0.02, 0.05, 0.08, and 0.1) ceramics was determined using X-ray diffraction and Raman spectroscopy at room temperature, which revealed a phase transition from tetragonal to rhombohedral with increasing x. The dielectric properties were studied as a function of temperature at different frequencies, which indicated that the phase transition temperature (Tm) decreased with increasing x. The relaxor behavior was observed by frequency and temperature dependent dielectric permittivity. The Lorenz-type quadratic law was used to characterize the dielectric permittivity peaks near Tm of high-temperature slopes at 1 MHz. The temperatures Tm of dielectric permittivity peaks fit very well with the Vogel-Fulcher law in x = 0.05 and x = 0.1. The polarization hysteresis loops and electrostrictive were displayed at room temperature. The sample for x = 0.1 exhibits a slim loop with negligible hysteresis and a subtle linear feature, which is a promising transducer materia...