Optimization of ferroelectric and dielectric properties of Bi4Ti3O12 Nano-films Doped with Rare Earth Ions La3+ and Nd3+

被引：0
作者：
Guo K. [1 ]
He T. [1 ]
Kong H. [2 ]
Zhang R. [1 ]
机构：
[1] Key laboratory of Electronic Composites of Guizhou Province, College of Big Data and Information Engineering, Guiyang
[2] Yangming Collage, Guizhou University, Guiyang
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2016年 / 44卷 / 10期
关键词：
Bismuth titanate; Dielectricity; Doping; Ferroelectricity; Substitution mechanism;
D O I：
10.14062/j.issn.0454-5648.2016.10.13
中图分类号：
学科分类号：
摘要：
Ferroelectric Bi4Ti3O12 and Bi3.5(La/Nd)0.5Ti3O12 (doped with La3+ and Nd3+ ions) films grown on a Pt (111)/Ti/SiO2/Si(100) substrate were prepared via a sol-gel method and a subsequent rapid thermal treatment process. The phase composition, microstructure, ferroelectric and dielectric properties of the composites were investigated by X-ray diffraction and scanning electron microscopy. The results show that the grains in Bi4Ti3O12 and Bi3.5(La/Nd)0.5Ti3O12 films are distributed uniformly and arranged closely, having a randomly oriented polycrystalline perovskite structure. According to the results of the ferroelectric and dielectric test, Bi3.5(La/Nd)0.5Ti3O12 samples have better saturated ferroelectric hysteresis loops and rectangularity (i.e., the remanent polarization Pr increases from 9.35 μC/cm2 to 15.53 and 26.24 μC/cm2), lower leakage current (from 10-4 A/cm2 to 10-6 A/cm2 and even to 10-9 A/cm2) and greater dielectric constants but higher loss (tan δ increases from 0.02 to 0.10 and 0.25 in the high frequency band), compared to Bi4Ti3O12 samples. © 2016, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
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页码：1471 / 1476
页数：5
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