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The Electric Conduction Model of V-P-Fe CTR(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2005年04期
Page:
1-3
Research Field:
Publishing date:

Info

Title:
The Electric Conduction Model of V-P-Fe CTR
Author(s):
WANG Hui~1; GAN Chaoqin~2; WU Zonghan~2; ZHANG Mingde~2
1.School of Electrical and Automation Engineering,Nanjing Normal University,Jiangsu Nanjing 210042,China;2.Department of Physics,Southeast University,Jiangsu Nanjing 210096,China
Keywords:
critica l character istic;  the cha racte ristic of resistance-temperature;  crysta-l gra in;  gra in-boundary
PACS:
TM54
DOI:
-
Abstract:
The paper ana lyzes from am icroscopic perspective the re lationship be tw een VO2 and phase chang e, Fe2O3 and im pur ity flaw, P2O5 and c rysta-l g ra in form ation in the V-P-Fe CTR com po sition, e laborates the e lectr ic ity conduc tive cha racte ristic o f three k inds o fm ater ia ls form ing the so lid so lu tion. On the othe r hand, crysta-l gra in e lectr ic ity character istic and g ra in-bounda ry o f electr ic ity character istic can a lso be obta ined bym eans o f the radiom irror crysta l phase diag ram and chart ana lysis of the scanning e lectric ity m irror appearance. The deduction tha t CTR sem iconductor po rce la in is crysta-l gra in ( VO2, Fe3O4, P2O5 ) and g ra in-boundary composition could be inferred. Its e lectric conduction m ode l is: Crysta-l gra in-gra in-boundary o fm ode .l Th ism odel is used to ana lyze the resistance- tem pe ra ture character istic curv e o f the CTR sam ple. The res istance of the cry sta-l grain has the cr itica l character istic, appears to be me tal a t high temperature and sem iconducto r at low tem pera ture, wh ile the conducting m echanism o f the gra inboundary can be required as“ them ode l of po ten tia-l barr ier”.

References:

[ 1] 孙健, 甘朝钦. V-P-Fe 系CTR的研制[ J]. 应用科学学报, 2000, 18( 2): 186- 188.
[ 2] 莫以象, 李标荣, 周国良. 半导体陶瓷及其敏感元件 [M ]. 上海: 上海科学技术出版社, 1983.
[ 3] 杨文, 杨邦朝. 阳离子分布对尖晶石型热敏陶瓷电性能的影响[ J]. 功能材料, 2000, 31( 5): 513- 515.
[ 4] 刘思科. 半导体物理学[M ]. 北京: 国防工业出版社, 1979.
[ 5] 孙生才. 常温NTC 热敏电阻的几种材料[ J]. 传感器技术, 1991( 5) : 9- 13.
[ 6] 小西良弘, 迁改郎. 电子陶瓷基础和应用[M ] . 王兴斌, 译. 北京: 机械工业出版社, 1983

Memo

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Last Update: 2013-04-29