Materials Reports  2020, Vol. 34 Issue (Z1): 48-52 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
|
|
|
|
|
| First Principle Analysis of the Conductivity of La-W Co-doped SnO2 |
| SUN Shaoqi1, WANG Jingqin1, ZHU Yancai1, ZHANG Guangzhi2, BAO Zhizhou3
|
1 State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China;
2 Shanghai Liangxin Electrical Co., Ltd., Shanghai 200137, China3 People Ele Appliance Group, Wenzhou 325604, China |
|
|
|
|
Abstract The AgSnO2 contact material will precipitate SnO2 crystals with poor conductivity during use, which will affect the service life of the relay. In order to improve the conductivity of SnO2, through the first principle of the CASTEP module in Material Studio software, the single element La, W and the co-doped La and W were doped respectively in the SnO2 crystal to maintain the doping ratio of 16.8%. The unit cell parameters, band structure, density of states, atomic population,enthalpy change and electrical conductivity of the crystal were calculated. It is concluded that compared with single-element doping, after co-doping La and W, the band gap value is reduced to 0.222 eV, two 5d orbitals act simultaneously, and the valence band top passes through the Fermi level, increasing the impurity orbital. The absolute value of the enthalpy change increased to 11.635 eV, indicating that the structure is stable after doping. After doping, the bonding of La, W and O is stronger than that of Sn-O bonding, which intensifies the electron transfer. Its electrical conductivity is 46.653 times than that of the SnO2, and the electrical conductivity is improved.
|
|
Published: 01 July 2020
|
|
|
| Fund:This work was financially supported by the National Natural Science Foundation of China (51777057). |
| About author:: Shaoqi Sun, graduate of Hebei University of Technology, majoring in electrical engineering. She mainly engaged in research of electrical contact materials ; Jingqin Wang, is a professor and doctoral supervisor of Hebei University of Technology. Vice chairman and secretary-general of the Professional Committee on Relia-bility of Electrical Products of the Chinese Institute of Electrical Technology, professional member of the Low Voltage Apparatus of the Chinese Institute of Electrical Engineering and a member of the Professional Committee on Arc Contact and Arc. In 2009, she was selected into the Nation New Century Multi-Million Talent Project. In 2007, she was selected as an outstanding expert of Hebei Province. In 2012, she was selected as a government specialist expert of the State Council. She has long been engaged in teaching and scientific research on electrical reliability and electrical engineering. She has undertaken 3 National Natural Science Foundations and key projects, and more than 10 scientific research projects of the Ministry of Education, Hebei Province and Tianjin. She has published more than 200 papers, wrote 4 monographs in the field of electrical reliability, and participated in drafting 1 national standard. She has obtained 9 authorized invention patents. |
|
|
1 郑忠.AgSnO2NiO电触头材料的组织与性能研究.硕士学位论文,昆明理工大学,2017.
2 赵浩融,罗韦,谢永忠,等.电工材料,2016(1),24.
3 王景芹,陆俭国,温鸣,等.稀有金属材料与工程,2001(3),205.
4 朱艳彩.添加稀土氧化物的银氧化锡触头材料的研究.硕士学位论文,河北工业大学,2017.
5 于双淼,王景芹,陈令,等.稀有金属,DOI:10.13373/j.cnki.cjrm.XY19040015.
6 逯瑶,王培吉,张昌文,等.物理学报,2011,60(11),219
7 许春辉,杨平.半导体光电,DOI:10.16818/j.issn1001-5868.2019.04.017.
8 伏春平,孙凌涛.原子与分子物理学报,2018,35(5),867.
9 何海英,张召君,陈雅丽,等.原子与分子物理学报,DOI:10.3969/j.issn.1000-0364.2019.05.024.
10 康慧玲,王景芹,张颖,等.材料科学与工程学报,2019,37(3),463.
11 曹曙光,谢明,陈力,等.贵金属,2015(1),17.
12 赵彩甜,王景芹,蔡亚楠,等.中国有色金属学报,2017,27(12),2552.
13 刘光华.稀土材料与应用技术,北京工业出版社,2005.
14 El-Shazly T S, Hassan W M I, Rehim S S A, et al. Applied Physics A,2016,122(9),859.
15 付现凯,宫长伟,王家恒,等.人工晶体学报,2015,44(4),1114.
16 张勇,白朴存,崔晓明,等.内蒙古工业大学学报,2017,36(4),271.
17 丁超,李卫,刘菊燕,等.物理学报,2018,67(21),141.
18 康慧玲,王景芹,张颖.贵金属,2018,39(2),34.
19 刘恩科,朱秉升,罗晋生.半导体物理学(第六版),电子工业出版社,2003. |
|
|
|
渝公网安备50019002502923号 © Editorial Office of Materials Reports.
