Alternative TitlePreparation and electrical properties of (LaMn0.8Al0.2O3)1-x (Al2O3)x(0.05x0.2) NTC ceramics
赵丽君; 张惠敏; 常爱民; 赵鹏君; 张博; 张丙寅
Source Publication无机材料学报

采用氧化物固相法制备(LaMn_(0.8)Al_(0.2)O_3)_(1-x)(Al_2O_3)_x (0.05≤x≤0.2)系列负温度系数(Negative Temperature Coefficient, NTC)热敏陶瓷材料。利用热重-差热(TG-DSC)、X射线衍射(XRD)、扫描电子显微镜(SEM)、X射线能谱(EDS)、阻温特性以及老化性能 测试等手段, 确定了材料粉体最佳煅烧温度, 表征了陶瓷体物相、形貌、元素含量、电学性能、稳定性与Al_2O_3含量的关系。结果表明: (LaMn_(0.8)Al_(0.2)O_3)_(1-x)(Al_2O_3)_x (0.05≤x≤0.2)系列热敏陶瓷材料电阻率随着Al_2O_3含量增加显著增大, 但材料常数B值增加平缓。当x=0.15时, 该陶瓷材料呈现出低B (2816.44 K)、高阻(11893.89 Omega·cm)的优良电学特性。热敏电阻经125℃老化500 h, 阻值漂移(DeltaR/R)均小于0.94%。

Other Abstract

(LaMn0.8Al0.2O3)1-x (Al2O3)x (0.05≤x≤0.2) negative temperature coefficient (NTC) ceramics were synthesized through a standard solid-state method. Thermogravimetry-differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectroscope (EDS), resistance-temperature measurement and aging test were carried out to characterize the optimal calcined temperature, phase structure, morphology, elements concentration, R-T properties and electrical stability, respectively. The results show that the electrical resistivity of the ceramic samples increases remarkably as Al2O3 content increasing, while the constant B value has just little change. Specially, the ceramics exhibit superior properties of low B value (2816.44 K) and high resistivity (11893.89 Ω(cm) when x=0.15. In addition, the resistance variation (ΔR/R) of samples is less than 0.94% after aging at 125°C for 500 h.

KeywordNtc热敏陶瓷 电性能
Indexed BySCI ; CSCD
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Document Type期刊论文
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GB/T 7714
赵丽君,张惠敏,常爱民,等. (LaMn0.8Al0.2O3)1-x(Al2O3)x(0.05≤x≤0.2)NTC热敏陶瓷材料制备及电性能研究[J]. 无机材料学报,2014,29(1):85-90.
APA 赵丽君,张惠敏,常爱民,赵鹏君,张博,&张丙寅.(2014).(LaMn0.8Al0.2O3)1-x(Al2O3)x(0.05≤x≤0.2)NTC热敏陶瓷材料制备及电性能研究.无机材料学报,29(1),85-90.
MLA 赵丽君,et al."(LaMn0.8Al0.2O3)1-x(Al2O3)x(0.05≤x≤0.2)NTC热敏陶瓷材料制备及电性能研究".无机材料学报 29.1(2014):85-90.
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