Gas sensing behavior of porous ZnO varistors densified via rate controlled sintering

Conference · Tue Dec 31 00:00:00 EST 1996

OSTI ID:462756

Agarwal, G; Speyer, R F ^[1]

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1. Georgia Inst. of Tech., Atlanta, GA (United States)

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 H{sub 2} concentration. A mechanism for the shift in breakdown voltage based on adsorbed oxygen is suggested for this unique and potentially very useful sensor.

• OSTI ID: 462756
• Report Number(s): CONF-960401-; ISBN 1-55899-334-7; TRN: IM9719%%226
• Resource Relation: Conference: Spring meeting of the Materials Research Society (MRS), San Francisco, CA (United States), 8-12 Apr 1996; Other Information: PBD: 1996; Related Information: Is Part Of Microporous and macroporous materials; Lobo, R.F. [ed.] [Univ. of Delaware, Newark, DE (United States)]; Beck, J.S. [ed.] [Mobil Technology Co., Paulsboro, NJ (United States)]; Suib, S.L. [ed.] [Univ. of Connecticut, Storrs, CT (United States)]; Corbin, D.R. [ed.] [E.I. Dupont de Nemours and Co., Wilmington, DE (United States)]; Davis, M.E. [ed.] [California Inst. of Tech., Pasadena, CA (United States)]; Iton, L.E. [ed.] [Argonne National Lab., IL (United States)]; Zones, S.I. [ed.] [Chevron Research and Technology Co., Richmond, CA (United States)]; PB: 566 p.; Materials Research Society symposium proceedings, Volume 431
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN FUEL
HYDROGEN
MONITORS
ZINC OXIDES
SEMICONDUCTOR RESISTORS
FABRICATION
MICROSTRUCTURE
PERFORMANCE
BREAKDOWN
ELECTRIC POTENTIAL
GRAIN SIZE