Dy、Ho稀土协同作用对X9R型钛酸钡基陶瓷介电性能影响研究  

Study on The Synergistic Effect of Dy and Ho Rare Earths on The Dielectric Properties of X9R BaTiO_(3)-Based Ceramic

作　　者：栾赛伟 郭瑞 张蕾 付振晓 曹秀华 于淑会[1] 孙蓉[1] LUAN Sai-Wei;GUO Rui;ZHANG Lei;FU Zhen-Xiao;CAO Xiu-Hua;YU Shu-Hui;SUN Rong(Shenzhen Institute of Advanced Electronic Materials,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China;Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen 518055,China;State Key Laboratory of Advanced Materials and Electronic Components,Guangdong Fenghua Advanced Technology Holding Co.,Ltd,Zhaoqing 526060,China)

机构地区：[1]中国科学院深圳先进技术研究院深圳先进电子材料国际创新研究院,广东深圳518055 [2]昆明理工大学冶金与能源工程学院,昆明650093 [3]南方科技大学前沿与交叉科学研究院,广东深圳518055 [4]广东风华高科科技股份有限公司先进材料与电子元器件国家重点实验室,广东肇庆526060

出　　处：《现代技术陶瓷》2024年第6期530-540,共11页Advanced Ceramics

基　　金：国家重点研发计划(2022YFB3807403);国家自然科学基金(51802142);广东省自然科学基金(2022A1515012604);江苏省自然科学基金(BK20211231);新型电子元器件与材料国家重点实验室(FHR-JS-202011012);先进电子元器件联合创新中心(FHR-JS-202103001)

摘　　要：多层陶瓷电容器(MLCC)高容量、高温稳定性的发展加快了X9R型(-55至200℃,ΔC/C_(25℃)≤±15%)高性能陶瓷介质材料的开发。本文采用常规固相反应方法,系统研究了稀土元素Dy、Ho单掺和共掺协同作用对0.9BaTiO_(3)–0.1(Bi_(0.5)Na_(0.5))TiO_(3)–0.02Nb_(2)O_(5)陶瓷的相结构、微观形貌和介电性能影响,成功制备出宽温稳定X9R型钛酸钡基陶瓷介质材料。实验结果表明:稀土元素Dy、Ho陶瓷晶粒中显示典型的“芯—壳”结构,具有良好的温度稳定性。当Dy=0.75 mol%和Ho=0.25 mol%的双稀土协同作用时,在室温下获得最佳介电性能,介电常数最高为1725,容温系数(TCC,-55℃~200℃)≤15%,0.9BaTiO_(3)–0.1(Bi_(0.5)Na_(0.5))TiO_(3)–0.02Nb_(2)O_(5)–0.75Dy_(2)O_(3)–0.25Ho_(2)O_(3)材料较高的介电常数和优异的X9R型容温特性是高温MLCC应用极具前途的介质材料。the development of X9R type(−55 to 200℃,ΔC/C_(25℃)≤±15%)high-performance ceramic dielectric materials has been accelerated by the advancement in high-capacity and hightemperature stability of Multilayer Ceramic Capacitors(MLCCs).In this study,the conventional solid-state reaction method was employed to systematically investigate the effects of the individual and synergistic doping of rare earth elements Dy and Ho on the phase structure,microstructure,and dielectric properties of 0.9BaTiO_(3)–0.1(Bi_(0.5)Na_(0.5))TiO_(3)–0.02Nb_(2)O_(5)ceramics.As a result,a wide-temperature stable X9R type BaTiO3-based ceramic dielectric material was successfully prepared.The experimental results indicate that the ceramic grains of rare earth elements Dy and Ho exhibit a typical“core-shell”structure,demonstrating good temperature stability.The optimal dielectric performance is achieved at room temperature when Dy=0.75 mol%and Ho=0.25 mol%are synergistically doped,with the highest dielectric constant reaching 1725,and the temperature coefficient of capacitance(TCC,−55℃~200℃)≤15%.The material 0.9BaTiO_(3)–0.1(Bi_(0.5)Na_(0.5))TiO_(3)–0.02Nb_(2)O_(5)–0.75Dy_(2)O_(3)–0.25Ho_(2)O_(3),with its high dielectric constant and excellent X9R type temperature characteristics,is a promising candidate for high-temperature MLCC applications.

关 键 词：钛酸钡基陶瓷 Dy、Ho协同效应 “芯—壳”结构 X9R-MLCC 介电性能 

分 类 号：TQ174[化学工程—陶瓷工业]