高级检索
无机材料学报

无机材料学报 >

2009 , Vol. 24 >Issue 5: 1008 - 1012

DOI: https://doi.org/10.3724/SP.J.1077.2009.01008

研究论文

Co0.8Mn0.8Ni0.9Fe0.5O4 纳米粉体的制备及热敏特性研究

  • 张东炎 ,
  • 张惠敏 ,
  • 靳先静 ,
  • 常爱民
展开
  • (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 研究生院, 北京 100049)

收稿日期: 2008-12-10

  修回日期: 2009-02-18

  网络出版日期: 2009-09-20

收起

Preparation and Thermal Sensitive Characteristics of the
Co0.8Mn0.8Ni0.9Fe0.5O4 Nanometer Powders

  • ZHANG Dong-Yan ,
  • ZHANG Hui-Min ,
  • JIN Xian-Jing ,
  • CHANG Ai-Min
Expand
  • (1. Xinjiang Technical Institute of physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China; 2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China)

Received date: 2008-12-10

  Revised date: 2009-02-18

  Online published: 2009-09-20

Fold

摘要

采用共沉淀法,以NH4HCO3为沉淀剂制备了Co0.8Mn0.8Ni0.9Fe0.5O4 负温度系数(NTC)热敏电阻纳米粉体材料, 研究了不同预烧温度对材料相结构的影响, 探讨了不同烧结工艺对NTC热敏电阻材料微观结构和热敏性能的影响. 采用X射线衍射(XRD)、综合热分析(TG/DTA)、红外(FT-IR)、扫描电子显微技术(SEM)和激光粒度分析仪对制备的样品进行了表征. 结果表明, 750℃预烧后的粉体为纯尖晶石相, 晶粒粒度为32.1nm, 颗粒粒径在50～100nm范围内. 通过对不同烧结程序的对比研究发现, 当烧结程序为：840℃、1200℃各保温2h, 升降温速率为1℃/min时, 样品电学性能较好：ρ25℃=1183Ω·cm, B25/50=3034K. 分析表明, 该烧结程序能有效改善热敏电阻材料的微观结构和热敏性能. 根据ln ρ-1/T曲线斜率计算了经不同工艺烧结后热敏电阻材料的激活能在0.26eV左右.

关键词： NTC热敏电阻; 纳米粉体; 共沉淀法; 电阻率

本文引用格式

张东炎 , 张惠敏 , 靳先静 , 常爱民 . Co0.8Mn0.8Ni0.9Fe0.5O4 纳米粉体的制备及热敏特性研究[J]. 无机材料学报, 2009 , 24(5) : 1008 -1012 . DOI: 10.3724/SP.J.1077.2009.01008

Abstract

Nano-powders of Co0.8Mn0.8Ni0.9Fe0.5O4 NTC (Negative Temperature Coefficient) thermistor materials were prepared by co-precipitation method with NH4HCO3 as precipitator. The effects of calcination temperature on the material phase were studied. The influences of different sintering processes on the microstructure and thermal sensitive characteristics of NTC thermistor materials were investigated. The samples were characterized by XRD, TG/DTA, FT-IR, SEM, and Laser Particle Size Analyzer. The results show that the powders calcined at 750℃ are single spinel, the grain size of the powders is about 32.1nm, and the particle size is about 50-100nm. The samples possess better electrical properties: ρ25℃=1183Ω·cm, B25/50=3034K under the process conditions of constant temperature 840℃ and 1200℃ for 2h respectively, the heating and cooling rate of 1℃/min. It is found that proper sintering process can effectively improve the microstructure and thermal sensitive properties of the NTC thermistor materials. According to the calculation from the slope of lnρ-1/T curves, the activation energy is about 0.26eV.

Key words： NTC thermistor; nano-powders; co-precipitation; resisitivity

参考文献

［1］Wang Z B, Zhao C H, Yang P H, et al. Journal of the European Ceramic Society, 2006, 26(13):2833-2837.
［2］Metz R. Journal of Materials Science, 2000, 35(18):4705-4711.
［3］Saha D, Das Sharma A, Sen A, et al. Materials Letters, 2002, 55(6):403-406.
［4］Guillemet-Fritsch S, Salmi J, Sarrias J, et al. Materials Research Bulletin, 2004, 39(12):1957-1965.
［5］王恩信, 荆玉兰, 王鹏程, 等. 电子元件与材料, 1997, 16(4):1-9.
［6］贡长生, 张克立. 新型功能材料. 北京: 化学工业出版社, 2001, 1:132-136.
［7］Park K, Bang D Y. Journal of Material Science, 2003, 14(2):81-87.
［8］Kanade S A, Puri V. Materials Research Bulletin, 2008, 43(4):819-824.
［9］王卫民. Mn-Co-Ni-O基NTC热敏半导体陶瓷的低温烧结与电性能研究. 西安：西北工业大学博士论文, 2007.
［10］李言荣, 恽正中. 电子材料导论. 北京: 清华大学出版社, 2001: 384-388.
［11］Buchanan R C. Ceramic Materials for Electronics, 3rd ED. Boca Raton:CRC press Inc.,2004: 323-430.
［12］纪士东, 王春玲. 电子元件与材料, 2005, 24(1):13-15.
［13］郑翠红, 汪 洋. 化工时刊, 2004, 1(18):31-33.
［14］Kanade S A, Puri V. Materials Letters, 2006, 60(11):1428-1431.
［15］蔡之让, 童 伟, 张 贝, 等(CAI Zhi-Rang, et al). 无机材料学报(Journal of Inorganic Materials),2008, 1(23):8-12
［16］Park K, Han I H. Journal of Electroceramics 2006, 17(2/3/4):1079-1082.
［17］Kanade S A, Puri V. Journal of Alloys Compounds, 2009, 475(1/2):352-355.
Options
文章导航

/

〈 〉