烧结气氛对反铁电陶瓷储能性能的影响  

Influences of Sintering Atmosphere on the Energy Storage Properties of Antiferroelectric

作　　者：孙宏辰 徐卓[1] 冯玉军[1] 魏晓勇[1] 徐然[1] 王晓智 赵焓 SUN Hongchen;XU Zhuo;FENG Yujun;WEI Xiaoyong;XU Ran;WANG Xiaozhi;ZHAO Han(Electronic Materials Research Laboratory,Key Laboratory of the Ministry of Education&International Center for Dielectric Research,School of Electronic and Information Engineering,Xi'an Jiaotong University,Xi'an,710049,China;Suzhou Institute of Electronic Functional Materials Technology,Suzhou 215000,Jiangsu,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,国际电介质研究中心,西安710049 [2]苏州思萃电子功能材料技术研究所有限公司,江苏苏州215000

出　　处：《硅酸盐学报》2025年第2期249-256,共8页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金重点项目(52032010)。

摘　　要：贱金属内电极多层陶瓷电容器由于低成本优势受到广泛关注,为了防止贱金属内电极(Ni或Cu)在高温下氧化,需在低氧或还原气氛下烧结。本工作研究了低氧气氛烧结环境对Pb_(0.95)La_(0.02)Sr_(0.02)(Zr_(0.50)Sn_(0.40)Ti_(0.10))O_(3)(PLSZST)反铁电陶瓷电学性能的影响。氧含量降低,反铁电陶瓷的绝缘特性和储能特性有所降低,在5.3×10^(-10)atm(1 atm=101324.997 Pa)氧含量下,陶瓷体可恢复储能密度为2.76 J·cm^(-3),低于空气烧结样品的可恢复储能密度(3.56 J·cm^(-3)),放电储能密度为2.21 J·cm^(-3),放电电流为28.6 A。该工作为PLSZST反铁电陶瓷抗还原特性研究提供帮助,进一步推动贱金属内电极PLSZST反铁电多层陶瓷电容器研发及生产。Introduction In recent years,the high-voltage and high-power multi-layer ceramic capacitors(MLCCs)have attracted extensive attention with the development of new energy vehicles,5G communication and high-power pulse technologies.At present,the materials used in the MLCC inner electrode are mainly precious metal(Ag/Pd or Au)and base metal(Ni or Cu).Base metal materials have more cost advantages compared with the precious metal materials.In order to prevent the oxidation of the base metal Ni or Cu at high temperatures,it is necessary to sintering in a low oxygen or reducing atmosphere.In order to obtain MLCC products with excellent performance,it is necessary to strictly control the matching of the sintering atmosphere between the inner electrode and the ceramic body during the sintering process.The crystal structure and electrical properties of the ceramic will be significantly reduced in the reducing atmosphere or low oxygen atmosphere environment,mainly because the precipitation of metal lead will destroy the lattice structure,or produce lattice defects.Therefore,it is of great significance to study the properties of Pb LaZrSnTiO_(3)-based(PLZST-based)antiferroelectric ceramics in low oxygen sintering atmosphere.In this paper,PLZST-based antiferroelectric ceramics were sintered in four kinds of low oxygen sintering atmosphere.The crystal structure,microstructure and electrical properties of PLZST-based antiferroelectric ceramics were studied.Moreover,the energy storage properties of all samples were studied.Methods Pb_(0.95)La_(0.02)Sr_(0.02)(Zr_(0.50)Sn_(0.40)Ti_(0.10))O_(3)(PLSZST)antiferroelectric ceramics doped with were prepared using the traditional solid-state method.High quality raw materials,namely Pb_(3)O_4(95%,Sinopharm),La_(2)O_(3)(99.99%,Acros),ZrO_(2)(99%,Aladdin),Sn O_(2)(99.8%,Sinopharm),TiO_(2)(99.8%,Sinopharm)and SrCO_(3)(99%,Sinopharm),were weighted 500 g according to stoichiometric and ball milling for 12 h with ethyl alcohol as a solvent and dried at 70℃.These raw materials were calcined at

关 键 词：反铁电陶瓷 贱金属内电极 低氧烧结气氛 多层陶瓷电容器 储能 

分 类 号：TM534.1[电气工程—电器]