关芳; 张惠敏; 赵丽君; 常爱民; 赵鹏君; 张博
Source Publication无机化学学报

采用氧化物固相法制备(LaMn1-xTixO3)0.67(NiMn2O4)0.33系列NTC(Negative temperature coefficient)复合热敏电阻材料。利用TG/DSC、激光粒度分析、XRD、SEM、阻-温特性和老化性能测试等手段,确定了粉体煅烧温度,表征了粉体的颗粒尺寸、陶瓷体的物相、形貌及其电学特性、稳定性等与Ti掺杂量的关系。结果表明:在1 200~1 300℃烧结温度范围内,(LaMn1-xTixO3)0.67(NiMn2O4)0.33复合体系的电阻率ρ25℃随Ti含量的增加而显著增加;电阻率ρ25℃和B值变化范围分别为4.4~53 179Ω.cm、1 357~3 998 K。125℃下老化1 000 h阻值变化率ΔR/R0均小于0.51%。该复合体系电阻率、B值调整范围较大,稳定性好,是一种具有实际应用价值的NTC热敏电阻材料。

Other Abstract

A series of NTC (Negative temperature coefficient) composite material of (LaMn1-xTixO3)0.67(NiMn2O4)0.33was prepared by solid-state method. The calcined temperature, particle size, ceramics phase structure,morphology, R-T property and electrical stability were characterized by TG/DSC, Laser particle size analyzer,XRD, SEM, resistance-temperature measurement and aging test, respectively. The results show that in the rangeof 1 200 ~1 300 sintered temperature, the electrical resistivity ρ25 of the composite ceramics increasedsignificantly with Ti content increased. The ρ25 are found to be in the range of 4.4~53 179 Ω·cm and the B25/50values are 1 357~3 998 K. The resistance drift rate ΔR/R0 of the composite ceramics after 1 000 h aging test at125 was less than 0.51%. The electrical resistivity and B value of (LaMn1-xTixO3)0.67(NiMn2O4)0.33 could be adjusted to desired values. The composite system has high stability. Therefore, the (LaMn1-xTixO3)0.67(NiMn2O4)0.33could be used for NTC thermistor as advanced semi-conducting materials.

Keyword(Lamn1-xtixo3)0.67(Nimn2o4)0.33 Ti掺杂 Ntc复合热敏陶瓷 电性能
Indexed BySCI ; CSCD
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关芳,张惠敏,赵丽君,等. Ti掺杂对(LaMn1-xTixO3)0.67(NiMn2O4)0.33(0≤x≤0.7)陶瓷材料微结构及电性能影响[J]. 无机化学学报,2013,29(4):760-766.
APA 关芳,张惠敏,赵丽君,常爱民,赵鹏君,&张博.(2013).Ti掺杂对(LaMn1-xTixO3)0.67(NiMn2O4)0.33(0≤x≤0.7)陶瓷材料微结构及电性能影响.无机化学学报,29(4),760-766.
MLA 关芳,et al."Ti掺杂对(LaMn1-xTixO3)0.67(NiMn2O4)0.33(0≤x≤0.7)陶瓷材料微结构及电性能影响".无机化学学报 29.4(2013):760-766.
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