Hostname: page-component-745bb68f8f-lrblm Total loading time: 0 Render date: 2025-01-27T16:04:09.118Z Has data issue: false hasContentIssue false
  • English
  • Français

Gas Sensing Behavior of Porous ZnO Varistors Densified via Rate Controlled Sintering

Published online by Cambridge University Press:  10 February 2011

Gaurav Agarwal  and
Robert F. Speyer
Gaurav Agarwal
Affiliation:
Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332
Robert F. Speyer
Affiliation:
Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332
Get access

Abstract

A hydrogen gas sensor based on shift in breakdown voltage of a ZnO varistor was developed. Changes in rate controlled sintering schedules resulted in significant variations in microstructure. Microstructures showing more intergranular porosity and finer grain size demonstrated a comparatively more linear and broad response to H2 concentration. A mechanism for the shift in breakdown voltage based on adsorbed oxygen is suggested for this unique and potentially very useful sensor.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 431: Symposium P – Microporous and Macroporous Materials , 1996 , 427
Copyright
Copyright © Materials Research Society 1996

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

[1] Sukkar, M. H. and Tuller, H. L. in Advances in Ceramics, Vol. 7, Additives and Interfaces in Electronic Ceramics edited by Yan, M. F. and Heuer, A. H. (American Ceramic Society, Columbus, OH. 1983) pp. 71–90.Google Scholar
[2] Gupta, T. K., J. Amer. Ceram. Soc., 73 [7] pp. 1817–1840 (1990).Google Scholar
[3] Agarwal, G., Speyer, R. F. and Hackenberger, W. S., J. Mater. Res. 11 [3], pp. 671–676 (1996).Google Scholar
[4] Azad, A. M., Akbar, S. A., Mhaisalkar, S. G., Birkfield, L. D., and Goto, K. S., J. Electrochemical Society, 139 [12] (1992).Google Scholar