| BaTi1-xFexO3-δ六方钙钛矿陶瓷材料的NTC特性 |
| |
| 引用本文： | 薛丹,李一宇,刘玉龙,李志成,张鸿.BaTi1-xFexO3-δ六方钙钛矿陶瓷材料的NTC特性[J].中南大学学报(自然科学版),2012,43(4):1261-1266. |
| |
| 作者姓名： | 薛丹 李一宇 刘玉龙 李志成 张鸿 |
| |
| 作者单位： | 中南大学材料科学与工程学院,湖南长沙,410083;中南大学有色金属材料科学与工程教育部重点实验室,湖南长沙,410083 |
| |
| 基金项目： | 国家自然科学基金资助项目(50872155);中国博士后科学基金资助项目(20080431030);湖南省科技计划博士后科研资助专项(2008RS4015) |
| |
| 摘 要： | 采用湿化学合成方法制备BaTi1-xFexO3-δ(x=0.1,0.2.0.3)粉体,经传统烧结工艺得到致密的块体陶瓷材料.利用X线衍射分析材料的相组成,通过电阻-温度特性和交流阻抗谱分析材料的导电性质随温度变化的特性.利用热激活诱导极化子跳跃导电模型对材料的NTC特性进行分析讨论.研究结果表明:BaTi1-xFexO3-δ材料具有六方钙钛矿晶体结构,并体现出优异的电阻负温度系数(NTC)特性；当x=0.1,0.2和0.3时,BaTi1-xFexO3-δ的NTC系数分别为5497,5284和4828K.
|
| 关 键 词： | BaTi1-xFexO3-δ陶瓷 六方晶体结构 NTC效应 导电性 |
NTC characteristic of BaTi1-xFexO3-δ hexagonal perovskite ceramics |
| |
| XUE Dan
,
LI Yi-yu
,
LIU Yu-long
,
LI Zhi-cheng
,
ZHANG Hong.NTC characteristic of BaTi1-xFexO3-δ hexagonal perovskite ceramics[J].Journal of Central South University:Science and Technology,2012,43(4):1261-1266. |
| |
| Authors: | XUE Dan LI Yi-yu LIU Yu-long LI Zhi-cheng ZHANG Hong |
| |
| Institution: | 1,2(1.School of Materials Science and Engineering,Central South University,Changsha 410083,China;2.Key Laboratory of Non-ferrous Materials Science and Engineering,Ministry of Education,Central South University,Changsha 410083,China) |
| |
| Abstract: | The powders of BaTi1-xFexO3-δ(x=0.1,0.2,0.3) were prepared by a wet chemical process,and the related ceramics were obtained by the conventional sintering technique.X-ray diffraction was used to analyze the crystalline structure.The temperature dependence of electrical conductivity of the ceramics was investigated by using a resistance-temperature measurement system and electrochemical impedance spectroscopy.The electron hopping by thermal activation is supposed to be the NTC mechanism for BaTi1-xFexO3-δ ceramics.The results show that the BaTi1-xFexO3-δ ceramics have hexagonal perovskite crystalline structure and exhibit an excellent characteristic of negative temperature coefficient(NTC) of resistance in the measuring temperature range.The NTC constants of the BaTi1-xFexO3-δ ceramics are 5 497,5 284 and 4 828 K for x as 0.1,0.2 and 0.3,respectively. |
| |
| Keywords: | BaTi1-xFexOδ ceramic hexagonal crystal structure NTC effect conductivity |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
