文档介绍：------------------------------------------------------------------------------------------------ —————————————————————————————————————— CBS 掺杂对钛酸钡陶瓷介电性能的影响第4期电子元件与材料 6 年4月 PONENTS & MATERIALS Apr. 2006 研究与试制 R & D尧彬,张树人,周晓华,唐斌(电子科技大学微电子与固体电子学院,四川成都 610054 ) 摘要: 研究了钙硼硅( CBS ) 微晶玻璃掺杂 BaTiO3(BT)-Nb2O5-Zn O 系统的微结构和介电性能, 并用掺杂后晶粒壳与晶粒芯体积分数的变化规律分析了其改性机理。对比 SEM 照片得出,不同含量 CBS 掺杂 BT 的室温εr 与掺杂后 BT 陶瓷的晶粒生长情况以及玻璃相的多少和分布密切相关。经优化配方和工艺后,在空气中于 1 150 ℃烧成的 BaTiO3 陶瓷材料的主要性能指标达到:εr 25℃>1 350, tgδ≤ × 10– 2,ρ≥ 1011 ?· cm, 最大电容量变化率不超过± 10% (– 55~ +150 ℃) ,适于制备中温烧结 X8R 多层陶瓷电容器。关键词: 无机非金属材料; X8R ;钛酸钡;微晶玻璃掺杂;介电性能中图分类号: TM 534 文献标识码:A 文章编号:1001-2028 ( 2006 ) 04-0020-04 ------------------------------------------------------------------------------------------------ —————————————————————————————————————— Influence of CBS Doping on Dielectric Properties of BaTiO3 Ceramics YAO Bin, ZHANG Shu-ren, ZHOU Xiao-hua, TANG Bin (School of Microelectronic and Solid State Electronics, University of Electronic Science and Technology, Chengdu 610054, China) Abstract: Investigated were the microstructure and dielectric properties of BaTiO3(BT)-Nb2O5-ZnO system doped with CBS glass-ceramic. The results reveal that when the amount of CBS is small, it assembles at grain boundary. And the barium titanate grains are coated with glass as the amount of CBS increases. The various effects of different amount of CBS doping on the BT ceramics can be explained by the volume proportion change of grain core and grain shell in the core-shell structure. After the SEM photographs were analyzed, it proves that εr has close relat ionship with the grain size of BT ceramics and the volume proportion and distribution of the glass phase. By position and technical process, the BaTiO3 ceramics sintered at1 150 ℃ into the atmosphere have perfect dielectric properties: εr 25℃>1 300, tg δ≤ × 10– 2, ρ≥ 1011? · cm, Δ C/C ≤± 10%( – 55~+155 ℃). This material is promising for the preparation of X8R . Key wo