摘要
以钛酸丁酯和乙酸钡为起始原料,采用液相法制备了纳米钛酸钡。研究了纳米钛酸钡和碳酸锰的掺杂对普通亚微米级钛酸钡的形貌及介电性能的影响。结果表明,在普通钛酸钡中加入一定量的纳米钛酸钡可以促进晶粒的生长,同时提高陶瓷的介电常数。而在普通钛酸钡中加入一定量的碳酸锰则可以抑制晶粒的生长。但同时添加碳酸锰和纳米钛酸钡,碳酸锰对晶粒生长的抑制作用将居于主导地位,并且此时钛酸钡陶瓷的介电常数温度特性曲线与单独添加锰离子时的走势基本相同,室温附近的介电常数峰将由于钛酸钡陶瓷的细晶效应而弥散。
Nano-sized BaTiO3 was prepared by liquid-phase method using tetrabutyl orthotitanate and barium acetate as raw materials. The effects of nano-sized BaTiO3 and MnCO3 doping on the morphology and dielectric properties of common submicron-sized BaTiO3 were investigated. The results show that the grain growth of submicron-sized BaTiO3 is accelerated when doped with nano-sized BaTiO3, and the permittivity increases. While the grain grc,wth is restrained when doped with MnCO3. But when MnCO3 and nano-sized BaTiO3 are doped into the submicron-sized BaTiO3 simultaneously, the grain growth restraint effect of MnCO3 to submicron-sized BaTiO3 is dominant, and the tendency of temperature dependence of permittivity is almost identical to the sample in which MnCO3 is doped alone, the pennittivity peak disperses at room temperature because of the fine grain effect in BaTiO3 ceramic.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2012年第8期9-11,共3页
Electronic Components And Materials
关键词
钛酸钡
纳米钛酸钡
晶核
微观结构
掺杂
BaTiO3
nano-sized BaTiO3
crystal nucleus
microstructure
doping
