Weakly coupled relaxor behavior of BaTiO3-Bi(Mg1/2Ti1/2)O-3 lead-free ceramics

被引：11
作者：
Zhang, Qiang [1 ]
Li, Zhenrong [2 ,3 ]
机构：
[1] Xian Univ Architecture & Technol, Postdoctoral Res Stn Mat Sci & Engn, Xian 710055, Shaanxi, Peoples R China
[2] Xi An Jiao Tong Univ, Minist Educ, Key Lab, Elect Mat Res Lab, Xian 710049, Shaanxi, Peoples R China
[3] Xi An Jiao Tong Univ, Int Ctr Dielect Res, Xian 710049, Shaanxi, Peoples R China
来源：
JOURNAL OF ADVANCED DIELECTRICS | 2013年 / 3卷 / 01期
关键词：
Lead-free ceramics; diffusion; energy density;
D O I：
10.1142/S2010135X13200014
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
(1-x) BaTiO3-xBi(Mg1/2Ti1/2)O-3 (BT-BMT, 0.3 <= x <= 0.6) ceramics were prepared by the conventional mixed oxide method. Dielectric measurements showed highly diffusive and dispersive relaxor-like characteristics for all compositions. For 0.3 <= x <= 0.4, all these compositions possess a stable dielectric permittivity of approximately 1500 and low loss tangent (tan delta < 2%) in the temperature range 200-400 degrees C, which may have great potential for high-temperature applications. For all samples, examination of the polarization hysteresis behavior shows an obvious linear hysteresis loops at 120 degrees C. It was found that the energy density of about 0.7 J/cm(3) could be achieved at 120 degrees C for x = 0.4 sample, indicating a high energy density.
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页数：4
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