硅酸盐学报2016，Vol.44Issue(10)：1471-1476,6.DOI:10.14062/j.issn.0454-5648.2016.10.13
La3+、Nd3+掺杂对Bi4Ti3O12纳米薄膜铁电和介电性能的优化
Optimization of Ferroelectric and Dielectric Properties of Bi4Ti3O12Nano-films Doped with Rare Earth Ions La3+ and Nd3+
摘要
Abstract
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 preparedvia 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 polarizationPr increases from 9.35μC/cm2 to 15.53 and 26.24μC/cm2), lower leakage current (from 10–4A/cm2to 10–6A/cm2and even to 10–9A/cm2) and greater dielectric constants but higher loss (tanδincreases from 0.02 to 0.10 and 0.25 in the high frequency band), compared to Bi4Ti3O12 samples.关键词
钛酸铋/掺杂/替代机理/铁电性能/介电性能Key words
bismuth titanate/doping/substitution mechanism/ferroelectricity/dielectricity分类
通用工业技术引用本文复制引用
郭凯鑫,何腾鹏,孔汉东,张荣芬..La3+、Nd3+掺杂对Bi4Ti3O12纳米薄膜铁电和介电性能的优化[J].硅酸盐学报,2016,44(10):1471-1476,6.基金项目
贵州科技厅与贵州大学联合基金(LH[2014]7612)项目；贵州大学人才引进项目([2014]30)；贵州大学研究生创新基金(研理工2016065)项目。 （LH[2014]7612）
