BST-BMN陶瓷两步法烧结制备及其储能性能研究  

Study on the Preparation and Energy Storage Properties of BST-BMN Ceramics by Two-Step Sintering

作　　者：王挺 刘旺华 王晓玲 林贝承 陈利帆 WANG Ting;LIU Wanghua;WANG Xiaoling;LIN Beicheng;CHEN Lifan(Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices,Huizhou University,Huizhou 516000,China;School of Foreign Languages,Huizhou University,Huizhou 516000,China)

机构地区：[1]惠州学院广东省电子功能材料与器件重点实验室,惠州516000 [2]惠州学院外国语学院,惠州516000

出　　处：《中国陶瓷》2025年第2期24-32,共9页China Ceramics

基　　金：广东省教育厅项目(2021KQNCX095)。

摘　　要：钛酸锶钡基陶瓷具有介电常数大、介电损耗小等优点,有望应用于电介质电容器领域,但采用传统固相法所制备的陶瓷晶粒尺寸较大,导致击穿场强低。利用两步法烧结的优势,研究两步法烧结中T 2温度对_(0.9)Ba_(0.65)Sr_(0.35)TiO_(3)-0.1Bi(Mg_(2/3)Nb_(1/3))O_(3)陶瓷相组成、微观结构和性能的影响。结果表明:两步法烧结所制备的陶瓷样品均为赝立方结构;当T 2温度的保温时间为15 h时,随着T 2温度的升高,陶瓷晶粒尺寸逐渐增大。陶瓷的储能效率随着T 2温度升高先增大后减小,剩余极化强度则先减小后增大。当T 2温度为1250℃时,陶瓷的储能性能最优,储能密度和储能效率分别为1.203 J/cm^(3)、92.65%。Barium strontium titanate-based ceramics have the advantages of a large dielectric constant and low dielectric loss,which are expected to be used in the field of dielectric capacitors.However,the grain size of ceramics synthesized by the traditional solid-state method is large,resulting in a low breakdown field strength.This study investigates the influence of the T 2 temperature in the two-step sintering method on the phase composition,microstructure and properties of_(0.9)Ba_(0.65)Sr_(0.35)TiO_(3)-0.1Bi(Mg_(2/3)Nb_(1/3))O_(3)ceramics.The results indicate that the ceramic samples prepared by two-step sintering exhibit a pseudo cubic structure.When the holding time for T 2 temperature is 15 h,the grain size of ceramics gradually increases with the increase of T 2 temperature.The energy storage efficiency of the ceramics initially increases and then decreases with increasing T 2 temperature,while the remanent polarization strength first decreases and then increases.Consequently,the optimal energy storage performance is achieved at a T 2 temperature of 1250℃,with an energy density of 1.203 J/cm^(3)and an energy storage efficiency of 92.65%.

关 键 词：钛酸钡 两步烧结法 介电常数 储能性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]