Study on microstructure and ferroelectricity of strontium barium titanate thin films prepared by Sol-Gel processing
Sr0.5Ba0.5-xBixTiO3 (SBT) thin films were fabricated on a Pt/SiO2/Si substrate by sol-gel method.The effects of chelating agent acetylacetone(HAcHAc) on the formation temperature and the microstructure of Sr0.5Ba0.5-xBixTiO3 (SBT) thin films were investigated in this paper.The microstructure of BST thin films was examined by XRD and TEM.It is found that Bi3+ doping decreases dielectric loss, improves frequency dispersion for BST thin films.The peak of temperature-dependence of dielectric constant of Bi3+-doped BST thin films is compressed and moves to a low-temperature region.An inclined angle of approximately 1.8° between the two different polarization vectors was observed for BST thin film from the results of high-resolution transmission electron microscopy (HRTEM).The Pr, Ps and Ec was 0.22μC/em2, 0.72μC/cm2 and 60Kv/cm respectively for Sr0.5Ba0.485Bi0.015TiO3 thin film at 100Hz, 20V.
SBT Ferroelectricity Thin Films Bi-doping
Lian-wei Shan Lai-guo Wang Wei Li Li-min Dong Zhi-dong Han Ze Wu Xing-hua Fu Wen-ping Hou
Department of Materials Science and Engineering,Harbin University of Science and Technology and Key Anhui Key Laboratory of Functional Coordination Compounds,School of Chemistry and Chemical Engineeri Department of Materials Science and Engineering,Jinan University,Jinan,250022,China
国际会议
2012 China Functional Materials Technology and Industry Forum(2012中国功能材料科技与产业高层论坛)(CFMTIF2012)
昆明
英文
202-207
2012-11-09（万方平台首次上网日期，不代表论文的发表时间）