高电场下Pb(Mg1/3Nb2/3)O3-PbTiO3厚膜陶瓷的介电与储能特性研究  

Dielectric and energy storage properties of Pb(Mg1/3Nb2/3)O3-PbTiO3 thick film ceramics under high electric field

作　　者：黄明峰 姚英邦 陶涛 梁波 鲁圣国 HUANG Mingfeng;YAO Yingbang;TAO Tao;LIANG Bo;LU Shengguo(Guangdong Provincial Research Center on Smart Materials and Energy Conversion Devices,School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,China;Dongguan South China Design Innovation Institute,Dongguan 523808,Guangdong Province,China)

机构地区：[1]广东工业大学材料与能源学院广东省智能材料和能量转化器件工程技术研究中心,广东广州510006 [2]东莞华南设计创新院,广东东莞523808

出　　处：《电子元件与材料》2020年第7期78-84,共7页Electronic Components And Materials

基　　金：国家自然科学基金(51372042,51872053);国家自然科学基金-广东省联合基金(U1501246);广东省自然科学基金重大基础研究培育项目(2015A030308004);广东省教育厅重大基础研究培育项目(2014GKXM039);东莞市核心技术攻关前沿项目(2019622101006)。

摘　　要：采用两步法制备了铌镁酸铅-钛酸铅((1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3(简称PMN-PT))(x=0.05,0.06,0.07)粉体,再采用流延法及一系列烧结工艺制备出厚度约为40μm的厚膜陶瓷。采用XRD和SEM对厚膜陶瓷样品的微观结构进行了表征,并分别采用阻抗分析仪和铁电综合测试仪得到了厚膜陶瓷的介电性能和电滞回线,再通过对电滞回线进行积分可得样品的储能密度和储能效率。结果表明:实验得到的PMN-PT厚膜陶瓷具有典型的弛豫型铁电体的特征;在室温附近获得相对介电常数大于20000的厚膜陶瓷;在30℃,测试频率为10 Hz,外加电场强度为15 MV/m时,x=0.05,0.06和0.07时的厚膜陶瓷储能密度分别达到0.87,0.94和0.88 J/cm3,对应储能效率分别为72.28%,81.44%和81.54%。In this paper,(1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3(PMN-PT)(x=0.05, 0.06, 0.07) relaxor ferroelectric ceramic powders were synthesized via the well-known two-step method(columbite method). Then, the thick film ceramics with the thickness of about 40 μm were fabricated using a tape-casting process and series of sintering approaches afterwards. The polycrystalline structures and morphologies of PMN-PT ceramics were characterized using the X-ray diffraction(XRD) and scanning electron microscopy(SEM) techniques. The dielectric and ferroelectric properties of PMN-PT ceramics were characterized using the impedance analyzer and ferroelectric polarization-electric field hysteresis loop measuring equipment, respectively. Based on the hysteresis loop, the charge and discharge energy storage densities and corresponding energy storage efficiencies of the ceramic samples were calculated. The procured ceramics manifest typical relaxor ferroelectric characteristics and excellent dielectric properties near room temperature. The energy storage densities of the samples with PT content of x=0.05, x=0.06, x=0.07 are 0.87 J/cm3, 0.94 J/cm3, 0.88 J/cm3 and the energy storage efficiencies of them are 72.28%, 81.44%, 81.54% at 15 MV/m, respectively.

关 键 词：铌镁酸铅-钛酸铅 厚膜陶瓷 介电特性 储能密度 储能效率 

分 类 号：TN384[电子电信—物理电子学]