| Preparation and thermal sensitive characteristics of the co0.8mn0.8ni0.9fe0.5o4 nanometer powders | |
| Zhang Dong-Yan1,2; Zhang Hui-Min1,2; Jin Xian-Jing1,2; Chang Ai-Min1 | |
| 刊名 | Journal of inorganic materials
 |
| 2009-09-01 | |
| 卷号 | 24期号:5页码:1008-1012 |
| 关键词 | Ntc thermistor Nano-powders Co-precipitation Resisitivity |
| ISSN号 | 1000-324X |
| 通讯作者 | Zhang dong-yan() |
| 英文摘要 | 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 degrees c are single spinel, the grain size of the powders is about 32.1 nm, and the particle size is about 50-100 nm. the samples possess better electrical properties: rho(25 degrees c) = 1183 omega . cm, b-25/50 = 3034 k under the process conditions of constant temperature 840 degrees c and 1200 degrees c for 2h respectively, the heating and cooling rate of 1 degrees c/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 in rho - 1/t curves, the activation energy is about 0.26ev. |
| WOS关键词 | ELECTRICAL-PROPERTIES ; NTC THERMISTORS ; CERAMICS ; CO |
| WOS研究方向 | Materials Science |
| WOS类目 | Materials Science, Ceramics |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000270322100027 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2393871 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhang Dong-Yan |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Dong-Yan,Zhang Hui-Min,Jin Xian-Jing,et al. Preparation and thermal sensitive characteristics of the co0.8mn0.8ni0.9fe0.5o4 nanometer powders[J]. Journal of inorganic materials,2009,24(5):1008-1012. |
| APA | Zhang Dong-Yan,Zhang Hui-Min,Jin Xian-Jing,&Chang Ai-Min.(2009).Preparation and thermal sensitive characteristics of the co0.8mn0.8ni0.9fe0.5o4 nanometer powders.Journal of inorganic materials,24(5),1008-1012. |
| MLA | Zhang Dong-Yan,et al."Preparation and thermal sensitive characteristics of the co0.8mn0.8ni0.9fe0.5o4 nanometer powders".Journal of inorganic materials 24.5(2009):1008-1012. |
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