反铁电储能陶瓷及电容器的极化特性  

Polarization Effect of Antiferroelectric Energy Storage Ceramic and Capacitor

作　　者：李缨萱 乔峰 张玲 王岗 王晓智 朱青山 徐然 徐卓[1] 冯玉军[1] LI Yingxuan;QIAO Feng;ZHANG Ling;WANG Gang;WANG Xiaozhi;ZHU Qingshan;XU Ran;XU Zhuo;FENG Yujun(Electronic Materials Research Laboratory,Key Laboratory of the Ministry of Education,Xi'an Jiaotong University,Xi'an 710049,China;Chengdu Hongke Electronic Technology Co,Chengdu 610199,China;The Fifth Electronics Research Institute of the Ministry of Industry and Information,Guangzhou 510642,China)

机构地区：[1]西安交通大学,电子陶瓷与器件教育部重点实验室,西安710049 [2]成都宏科电子科技有限公司,成都610199 [3]工业和信息化部电子第五研究所,广州510642

出　　处：《硅酸盐学报》2024年第4期1277-1287,共11页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金青年基金项目(52002311);国家自然科学基金重点项目(52032010)。

摘　　要：反铁电多层陶瓷电容器(MLCC)作为储能器件在脉冲功率技术、电力电子技术等领域具有重要的应用。与常规的I类或II类陶瓷电容器不同,反铁电电容器在出厂前会进行极化处理并标记极性。该极化过程可能对反铁电MLCC的应用带来影响,因此有必要研究反铁电陶瓷材料及电容器的极化特性。本工作采用固相反应法制备了电滞回线形状为“方直”和“细斜”的两类典型的反铁电陶瓷样品,通过对比未经极化与经过极化处理样品的电滞回线,分析预极化对反铁电陶瓷性能及储能密度的影响。通过不同温度退极化后反铁电陶瓷材料与MLCC电容值的差异,分析得出退极化现象对其性能的影响。结果表明:反铁电陶瓷材料及电容器未经过预极化或退极化后,极化强度、电容值与脉冲放电电流峰值均有所下降,且退极化程度均会随着温度升高而升高。对于“方直”型反铁电陶瓷材料,极性现象对其影响较为显著,而对于“细斜”型反铁电陶瓷材料,极性现象影响较为微弱。该研究对反铁电MLCC在实际应用中如何正确发挥出其优异的性能具有重要的意义。Introduction Antiferroelectric ceramic and multilayer ceramic capacitors have the advantages of high energy storage density,fast discharge speed,high discharge current,etc.,which can improve the energy storage density of pulse power device and effectively suppress ripple in power electronic system,etc.Unlike ferroelectrics,antiferroelectric materials adjacent to the lattice of dipoles reverse parallel,and therefore do not show a macroscopic spontaneous polarization phenomenon.In a certain external electric field,the dipoles redirect,the antiferroelectric phase converts to a ferroelectric phase,the polarization intensity increases abruptly after the withdrawal of the external electric field,and it returns to an antiferroelectric phase.This polarization/phase transition behavior can be characterized by the hysteresis loop.In the hysteresis loop,antiferroelectric material shows a double loop,and it is divided into two kinds,i.e.,“Square”and“Slant”according to the different shapes of the antiferroelectric hysteresis loop.The polarization effect of the antiferroelectric capacitor gives it the better energy storage characteristics and discharge performance,thus having an advantage in practical applications.General capacitors are polarized under a certain period of time and voltage in the factory.However,changes of external conditions(i.e.,temperature,voltage,time,etc.)can depolarize the antiferroelectric capacitor.Also,some antiferroelectric capacitors need to consider the effect of polarity.As a result,the practical application of antiferroelectric MLCCs is different from that of conventional Class I or Class II MLCCs.Therefore,in this paper,antiferroelectric ceramics with hysteresis loop shapes of“square”and“slant”were prepared by a conventional solid-phase reaction method to investigate the polarization effect of antiferroelectric ceramics and capacitors,and provide a guidance for the application of antiferroelectric MLCCs.Methods For the preparation of the antiferroelectric ceramic,the raw materials

关 键 词：反铁电陶瓷 多层陶瓷电容器 极化 储能密度 

分 类 号：TQ174.75[化学工程—陶瓷工业]