制备了SnO2棒状和球状晶粒粉体的气敏元件并进行稳定性测试,初步分析了元件的老化过程和机制.棒状和球状晶粒粉体以等重量比混合的气敏材料在850℃下高温烧结能提高气敏元件的长期稳定性.采用对材料微结构敏感的复阻抗谱方法测量了试样电性能的变化,通过吸收电流曲线分析了试样的与荷电状态有关的离子电导成分.结果表明,试样在通电老化之初电阻电容值有较大波动,通电数天后趋于稳定,老化表现为晶界电阻和晶界电容的变化,说明老化过程伴随着气敏材料的晶界势垒高度和晶界耗尽层宽度的改变,其原因可能是直流偏压作用下晶界层中的离子迁移.
参考文献
[1] | Mazzone AM .The conductance of SnO2 small nanowires: A study based on density functional and scattering theories[J].Solid State Communications,2007(10):481-486. |
[2] | Montenegro A;Ponce M;Castro M S;Rodriguez-Paez J E.SnO2-Bi2 O3 and SnO2-Sb2O3 gas sensors obtained by soft chemical method[J].Journal of the European Ceramic Society,2007(27):4143-4146. |
[3] | 李青山,张金朝,宋鹂.热处理对掺锑二氧化锡纳米导电粉粒度和性能的影响[J].无机材料学报,2002(03):489-496. |
[4] | 侯德东,刘应开.SnO2纳米棒的制备及表征[J].无机材料学报,2002(04):691-695. |
[5] | 刘星辉,唐东升,曾春来,海阔,解思深.化学气相沉积法制备氧化锡自组装纳米结构[J].物理化学学报,2007(03):361-366. |
[6] | Banarji Behera;P. Nayak;R.N.P. Choudhary .Impedance spectroscopy study of NaBa_2V_5O_(15) ceramic[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2007(1/2):226-232. |
[7] | Labidi A;Jacolin C;Bendahan M;Abdelghani A;Guerin J;Aguir K;Maaref M .Impedance spectroscopy on WO3 gas sensor[J].Sensors and Actuators, B. Chemical,2005(2):713-718. |
[8] | 李小玲;周镇宏;邓颖宇 .电容器介质吸收电流的测量和表征[J].无机材料学报,1996,11(02):337-342. |
[9] | 唐新桂;范仰才;蒋力立 .聚合物材料中的介电弛豫效应研究[J].材料导报,1999,13(02):71-73. |
[10] | 张循海,林蔚,唐万侠,丁莹莹.掺杂Bi2O3及Sb2O3的SnO2陶瓷气敏性研究[J].齐齐哈尔大学学报(自然科学版),2002(02):27-29. |
[11] | Montenegro A;Ponce M;Castro M S.SnO2-Bi2O3 and SnO2-Sb2O3 gas sensors obtained by soft chemical method[J].Journal of the European Ceramic Society,2007(27):4143-4146. |
[12] | Sarala Devi G;Manorama S V;Rac V J.SnO2:Bi2O3 based CO sensor:Laser-Raman,temperature programmed desorption and X-my photoelectron spectroscopic studies[J].Sensors and Actuators B:Chemical,1999(56):98-105. |
[13] | Yiying Wu;Peidong Yang .Direct Observation of VaporLiquid-Solid Nanowire Growth[J].Journal of the American Chemical Society,2001(13):3165-3166. |
[14] | Wang N.;Zhang YF.;Lee CS.;Lee ST.;Tang YH. .Nucleation and growth of Si nanowires from silicon oxide[J].Physical Review.B.Condensed Matter,1998(24):R16024-R16026. |
[15] | Evgenij Barsoukov;Ross Macdonald J.Impedance spectroscopy theory,experiment,and applications[M].A John Wiley & Sons.Inc.,Publication,2005:240. |
[16] | Udo Weimar;Wolfgang Gopel A e.Measurements on tin oxide sensors to improve selectivities and sensitivities[J].Sensors and Actuators B:Chemical,1995(26-27):13-18. |
[17] | 刘恩科;朱秉升;罗晋生.半导体物理学[M].北京:电子工业出版社,2006:202. |
[18] | 李标荣;张绪礼.电子陶瓷物理[M].武汉:华中理工大学出版社,1991:142. |
[19] | CHEN Zhixiong;LIN Guocong;FU Gang et al.[J].Science in China(Series A),1998,41(01):71-78. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%