摘要
以Bi2O3,Fe2O3,MnO2和SrCO3为主要原料,采用传统固相法制备出具有负温度系数(NTC)特性的SrBiFeMnO陶瓷。研究了该陶瓷的物相结构、断面形貌及电性能。结果表明:试样的室温电阻率ρ25和热敏电阻特性常数B25/85随着x(Mn)的增加均呈现先增大后减小的趋势。在25~200℃的测试温区内,x(Mn)为0.1时,掺杂的SrBiFeO陶瓷材料的电阻率-温度特性呈现良好的线性关系;x(Mn)为0.5时,掺杂SrBiFeO陶瓷材料具有较好的NTC特性,其ρ25为145Ω.cm,B25/85为2950K。
Using Bi2O3, Fe2O3, MnO2 and SrCO3 as main raw materials, the SrBiFeMnO ceramics with a negative temperature coefficient (NTC) characteristic was prepared by the conventional solid phase method. The phase structure, cross sectional morphology and electrical properties were all investigated. The results show that both values of the room temperature resistivity p25 and B2s/s5 increase first and then decrease The Mn-doped SrBiFeO ceramics with x (Mn) of 0.1 relationship at 25 - 200 ℃. When x (Mn) is 0. 5, with increasing the amount of doped Mn. shows good linear resistivity-temperature the Mn-doped SrBiFeO ceramics exhibitsgood NTC characteristics with the room temperature resistivity ρ25 of about 145Ω.cm and B25/85 of about 2 950 K.
出处
《微纳电子技术》
CAS
北大核心
2010年第6期345-349,共5页
Micronanoelectronic Technology
基金
广西信息材料重点实验室主任基金(PF090569)
广西研究生教育创新计划资助项目(2008105950805M437)
关键词
SrBiFeO
MN掺杂
负温度系数效应
相结构
电性能
SrBiFeO
Mn doping
negative temperature coefficient (NTC) effect
phase structure
electrical property