A/B位离子掺杂BiFeO_(3)纳米薄膜的微结构与铁电性能  

Structure and Ferroelectric Properties of BiFeO_(3) Nano-Crystalline Film Substituted at A/B Site

作　　者：韩亚洁[1,2] 钱进 王建荣[2] 林秀娟 杨长红[1] 黄世峰[1] HAN Yajie;QIAN Jin;WANG Jianrong;LIN Xiujuan;YANG Changhong;HUANG Shifeng(Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials,University of Jinan,Jinan 250022,China;School of Materials Science and Engineering,University of Jinan,Jinan 250022,China)

机构地区：[1]济南大学,山东省建筑材料制备与测试技术重点实验室,济南250022 [2]济南大学材料科学与工程学院,济南250022

出　　处：《硅酸盐学报》2021年第3期511-518,共8页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金面上项目(51972144,51632003);国家自然科学基金联合基金项目(U1806221);山东省重点研发计划(2019GGX102015);泰山学者攀登计划;济南市顶尖人才“一事一议”项目;济南市“高校20条”项目(2019GXRC017)。

摘　　要：采用化学溶液法结合层层旋涂退火工艺,在掺氟氧化锡导电玻璃基片上制备了BiFe_(0.9)5Mn_(0.05)O_(3)和Bi_(0.9)Nd_(0.1)FeO_(3)纳米晶铁电薄膜,并分析比较了其微结构和铁电性能。结果表明:2组分样品均为单相多晶钙钛矿结构,晶粒细小均匀,表面平整,结构致密。两薄膜均获得了饱和电滞回线,且BiFe_(0.9)5Mn_(0.05)O_(3)薄膜具有向上的择优取向极化和更优异的铁电性能,其剩余极化强度(Pr)达60mC·cm^(–2),在1~50 k Hz频率范围与25~200℃温度区间内铁电极化响应稳定,保持时间长达1′10^(3) s工作与反复极化翻转高达1′10^(9)次表现出优异的电荷保持力和抗疲劳稳定性。The nano-crystalline ferroelectric films composed of BiFe_(0.9)5Mn_(0.05)O_(3) and Bi_(0.9)Nd_(0.1)FeO_(3)were fabricated on the fluorine-doped tin oxide/glass substrates via the simple and cost-effective chemical solution deposition method combined with spin-coating and the subsequent layer-by-layer annealing technique. Microstructures and ferroelectric properties of the samples were investigated. Results show that either BiFe_(0.9)5Mn_(0.05)O_(3) or Bi_(0.9)Nd_(0.1)FeO_(3)film has a single polycrystalline perovskite phase structure with fine and homogeneous grains and smooth surface in addition to a compact and dense structure. Both film samples exhibited well-saturated polarization-electric field hysteresis loops. Especially, the BiFe_(0.9)5Mn_(0.05)O_(3) film showed more preferential upward polarization orientation and superior ferroelectric properties than the Bi_(0.9)Nd_(0.1)FeO_(3)film, which was reflected by a high remanent polarization(Pr) of 60 mC·cm^(–2) and stable ferroelectric responses to frequency and temperature in the ranges of 1 to 50 k Hz and 25 to 200 ℃ in addition to retention capability of 1′10^(3) seconds and fatigue endurance over 1′10^(9) cycles.

关 键 词：薄膜 铁酸铋 离子掺杂 微结构 铁电性 

分 类 号：TB34[一般工业技术—材料科学与工程]