Bi_(2)O_(3)对K_(2)O–B_(2)O_(3)–SrO–Al_(2)O_(3)–Nb_(2)O_(5)–SiO_(2)玻璃陶瓷介电储能性能的影响  

Effect of Bi_(2)O_(3) on Dielectric Energy Storage Performance of K_(2)O-B_(2)O_(3)-SrO-Al_(2)O_(3)-Nb_(2)O_(5)-SiO_(2) Glass-Ceramics

作　　者：耿喜乐 冯先杰 尚飞 陈国华[1] GENG Xile;FENG Xianjie;SHANG Fei;CHEN Guohua(School of Materials Science and Engineering,Engineering Center of Electronic Information Materials and Devices,Ministry of Education,Guilin University of Electronic Technology,Guilin,541004,Guangxi,China)

机构地区：[1]桂林电子科技大学电子信息材料与器件教育部工程中心,材料科学与工程学院,广西桂林541004

出　　处：《硅酸盐学报》2024年第4期1229-1239,共11页Journal of The Chinese Ceramic Society

基　　金：广西科技基地和人才专项(桂科AD21220138);国家自然科学基金地区科学基金项目(52162001)。

摘　　要：随着电力电子系统的不断发展,高功率脉冲电容器的需求增多。电介质电容器因具有放电功率大、充放电速度快及性能稳定等优点,在电力系统、电子器件、脉冲电源等方面发挥着重要作用,广泛应用于民用领域及军事领域。通过熔融压延制备玻璃基体,采用可控结晶工艺研究了不同含量的Bi_(2)O_(3)(x=0.0%、1.0%、2.0%、4.0%,摩尔分数)对K_(2)O–B_(2)O_(3)–SrO–Al_(2)O_(3)–Nb_(2)O_(5)–SiO_(2)玻璃陶瓷物相演化、微观结构、介电和储能性能的影响。在该玻璃陶瓷中,KSr_(2)Nb_(5)O_(15)为主要析出晶相,当Bi_(2)O_(3)的加入量为x=2.0%(摩尔分数)时,热处理温度为950℃时,玻璃陶瓷样品的储能密度最大可达到1.27 J/cm^(3),室温下介电常数可达342,是热处理温度为850℃时样品介电常数的1.9倍。在脉冲RLC电路测试中,当Bi_(2)O_(3)的加入量为x=2.0%(摩尔分数)且施加电场强度为400 kV/cm时,实测储能密度随着热处理温度的升高从1.02 J/cm^(3)增加到1.33 J/cm^(3)。Introduction With the development of power electronic systems,energy storage capacitors have the advantages of large discharge power,fast charging and discharging speed and stable performance,and play an important role in power systems,electronic devices,pulse power supplies,etc..They are widely used in civilian and military fields.Compared with fuel cells,the energy storage capacitors do not need to convert the Gibbs free energy of the chemical energy of the fuel into electrical energy through electrochemical reactions,but store the charge by pressurizing between the two plates of the capacitor with higher safety and reliability as well as environmentally friendness.The existing pulsed dielectric materials are mainly divided into ceramics,glass ceramics,thin films and other composite materials.Glass ceramics have energy storage advantages,compared with other materials.Increasing the dielectric constant of dielectric materials plays a crucial role in increasing the energy density.Methods A glass with the composition of 13K_(2)O-21SrO-32Nb_(2)O_(5)-5B_(2)O_(3)-4Al_(2)O_(3)-25SiO_(2-x)Bi_(2)O_(3)(x=0.0%,1.0%,2.0%,and 4.0%,in mole)was produced by a conventional melt annealing process.First,40 g of raw materials were weighed and ground in a polypropylene ball mill in ethanol for 12 h.The resulting mixture was dried at 100℃and subsequently melted in a corundum crucible in a resistance furnace at 1500℃for 2 h.The molten liquid was pressed into a sheet on a preheated copper plate and then annealed at 500℃for 6 h to eliminate residual internal stresses.Finally,a niobate glass was obtained.The glass slices were crystallized at 850℃and 950℃for 2 h to obtain glass ceramics.The glass ceramic samples were ground,polished,and plated with electrodes for the structural and performance tests.Results and discussion The effect of Bi_(2)O_(3) concentrations(x=0.0%,1.0%,2.0%,and 4.0%in mole)on the phase evolution,microstructure,dielectric and energy storage properties of K_(2)O-SrO-Nb_(2)O_(5)-B_(2)O_(3)-Al_(2)O_(3)-SiO_(2)

关 键 词：玻璃陶瓷 相结构 介电性能 储能性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]