(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

doi:10.3724/SP.J.1077.2014.13171

无机材料学报 ›› 2014, Vol. 29 ›› Issue (1): 85-90.DOI: 10.3724/SP.J.1077.2014.13171

(LaMn_0.8Al_0.2O₃)_1-x(Al₂O₃)_x(0.05≤x≤0.2)NTC热敏陶瓷材料制备及电性能研究

赵丽君^1,2,3,4, 张惠敏^1,2,3, 常爱民^1,2,3, 赵鹏君^1,2,3,4, 张博^1,2,3,4, 张丙寅^1,2,3,4

(1. 中国科学院新疆理化技术研究所, 乌鲁木齐830011; 2. 中国科学院特殊环境功能材料与器件重点实验室, 乌鲁木齐830011; 3. 新疆电子信息材料与器件重点实验室, 乌鲁木齐830011; 4. 中国科学院大学, 北京100049)

收稿日期:2013-03-25 修回日期:2013-04-22 出版日期:2014-01-20 网络出版日期:2013-12-09
作者简介:赵丽君(1986-), 女, 硕士研究生. E-mail: shuishangfuping2008@126.com
基金资助:
国家自然科学基金(50902148); 中科院“西部之光”(RCPY200901); 新疆维吾尔自治区科技计划项目(201116147)

Preparation and Electrical Properties of (LaMn_0.8Al_0.2O₃)_1-x(Al₂O₃)_x(0.05≤x≤0.2) NTC Ceramics

ZHAO Li-Jun^1,2,3,4, ZHANG Hui-Min^1,2,3, CHANG Ai-Min^1,2,3, ZHAO Peng-Jun^1,2,3,4, ZHANG Bo^1,2,3,4, ZHANG Bing-Yin^1,2,3,4

(1. Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China; 2. Key Laboratory of Functional Materials and Devices under Special Environments, Chinese Academy of sciences, Urumqi 830011, China; 3. Xinjiang Key Laboratory of Electronic Information Materials and Devices, Urumqi 830011, China; 4. University of Chinese Academy of Sciences, Bejing 100049, China)

Received:2013-03-25 Revised:2013-04-22 Published:2014-01-20 Online:2013-12-09
About author:ZHAO Li-Jun. E-mail: shuishangfuping2008@126.com
Supported by:
National Natural Science Foundation of China (50902148); “Western Light Foundation”Program of Chinese Academy of Sciences(RCPY200901); Science and Technology Program of Xinjiang Uygur Autonomous Region (201116147)

摘要/Abstract

摘要： 采用氧化物固相法制备(LaMn_0.8Al_0.2O₃)_1-x(Al₂O₃)_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Al₂O₃含量的关系。结果表明: (LaMn_0.8Al_0.2O₃)_1-x(Al₂O₃)_x(0.05≤x≤0.2)系列热敏陶瓷材料电阻率随着Al₂O₃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 Ω·cm)的优良电学特性。热敏电阻经125℃老化500 h, 阻值漂移(ΔR/R)均小于0.94%。

关键词: (LaMn_0.8Al_0.2O₃)_1-x(Al₂O₃)_x, NTC热敏陶瓷, 电性能

Abstract: (LaMn_0.8Al_0.2O₃)_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℃ for 500 h.

Key words: (LaMn_0.8Al_0.2O₃)_1-x(Al₂O₃)_x, NTC thermistor ceramics, electrical properties

中图分类号:

TQ174

赵丽君, 张惠敏, 常爱民, 赵鹏君, 张博, 张丙寅. (LaMn_0.8Al_0.2O₃)_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.

ZHAO Li-Jun, ZHANG Hui-Min, CHANG Ai-Min, ZHAO Peng-Jun, ZHANG Bo, ZHANG Bing-Yin. Preparation and Electrical Properties of (LaMn_0.8Al_0.2O₃)_1-x(Al₂O₃)_x(0.05≤x≤0.2) NTC Ceramics[J]. Journal of Inorganic Materials, 2014, 29(1): 85-90.

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(LaMn_0.8Al_0.2O₃)_1-x(Al₂O₃)_x(0.05≤x≤0.2)NTC热敏陶瓷材料制备及电性能研究

Preparation and Electrical Properties of (LaMn_0.8Al_0.2O₃)_1-x(Al₂O₃)_x(0.05≤x≤0.2) NTC Ceramics

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