CaBi_(4)Ti_(4)O_(15)-Bi(Fe_(0.93)Mn_(0.05)Ti_(0.02))O_(3)铁电固溶体薄膜的制备及储能特性  

Preparation and Energy Storage Properties of CaBi_(4)Ti_(4)O_(15)-Bi(Fe_(0.93)Mn_(0.05)Ti_(0.02))O_(3) Ferroelectric Solid Solution Thin Films

作　　者：余致尧 王文文 司景翔 苑秀芳 李成龙 林秀娟[1] 杨长红[1] YU Zhiyao;WANG Wenwen;SI Jingxiang;YUAN Xiufang;LI Chenglong;LIN Xiujuan;YANG Changhong(Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials,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

出　　处：《硅酸盐通报》2024年第6期2301-2309,共9页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金面上项目(51972144);山东省重点研发计划(2022CXPT045);济南市“高校20条”项目(T202009)。

摘　　要：采用金属有机分解法结合旋涂技术,在Pt(111)/TiO_(2)/SiO_(2)/Si衬底上制备(1-x)CaBi_(4)Ti_(4)O_(15)-xBi(Fe_(0.93)Mn_(0.05)Ti_(0.02))O_(3)(CBT-xBFMT,x=0,0.05,0.10,0.15)固溶体薄膜,通过X-射线衍射仪、场发射扫描电子显微镜、铁电分析仪和阻抗分析仪,系统研究了CBT基薄膜的储能性能。结果表明,所制备的薄膜均呈现出多晶铋层状结构,无杂相生成。BFMT的引入增大了薄膜的最大极化强度P_(m)和抗击穿场强E_(b),并降低了漏电流密度。随着BFMT固溶量的增加,CBT-xBFMT薄膜的抗击穿场强E_(b)先增大后减小,在x=0.10处达到最大;最大极化强度P_(m)逐渐增加,在x=0.10处极化强度差最大;最大抗击穿场强和最大极化强度差的共同作用使CBT-0.10BFMT薄膜具有最佳储能特性,有效储能密度W_(rec)和储能效率η分别为82.8 J/cm^(3)和78.3%,且储能稳定性(25~150℃)良好。CBT-0.10BFMT铁电薄膜有望应用于环境友好型小型能量储存器件。(1-x)CaBi_(4)Ti_(4)O_(15-x)Bi(Fe_(0.93)Mn_(0.05)Ti_(0.02))O_(3)(CBT-x BFMT,x=0,0.05,0.10,0.15)solid solution films were successfully prepared on Pt(111)/TiO_(2)/SiO_(2)/Si substrates using metal organic decomposition combined with spin coating technology.And the energy storage properties of CBT thin films were systematically studied by X-ray diffractometer,field emission scanning electron microscope,ferroelectric analyzer and impedance analyzer.The results show that the prepared films all exhibit a polycrystalline bismuth layered structure without other phase formation.The addition of BFMT into thin film obviously enhances the maximum polarization strength P_(m)and breakdown field strength E_(b),reduces the leakage current density.With the increase of BFMT solid solution,the breakdown field strength E_(b)of CBT-x BFMT film increases first and then decreases,and reaches the maximum value at x=0.10.The maximum polarization strength P_(m)gradually increases,and the largest polarization strength difference is obtained at x=0.10.The largest polarization intensity difference and breakdown field strength make CBT-0.10BFMT film has the best energy storage properties.The recoverable energy storage density W_(rec)and energy storage efficiencyηof CBT-0.10BFMT film are up to 82.8 J/cm^(3)and 78.3%,respectively.And its energy storage characteristic has good temperature stability in the temperature range of 25~150℃.Therefore,CBT-0.10BFMT ferroelectric film is expected to be used in environmentally friendly micro energy storage devices.

关 键 词：CaBi_(4)Ti_(4)O_(15)薄膜 固溶体 介电储能 击穿场强 极化强度差 高温 

分 类 号：TN384[电子电信—物理电子学]