Studies on Gas Sensing Performance of Pure and Surface Modified SrTiO^sub 3^ Thick Film Resistors

Strontium Titanate (SrTiO^sub 3^ (ST)) was prepared mechanochemically from Sr(OH)^sub 2^ and TiO^sub 2^. XRD confirms the Perovskite phase of material. Thick films of ST were prepared by screenprinting technique. The gas sensing performances of thick films were tested for various gases. It showed ma...

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Bibliographic Details
Published inSensors & transducers Vol. 6; p. 57
Main Authors Gaikwad, V B, Kajale, D D, Baste, Y R, Shinde, S D, Khanna, P K, Pawar, N K, Chavan, D N, Deore, M K, Jain, G H
Format Journal Article
LanguageEnglish
Published Toronto IFSA Publishing, S.L 01.08.2009
Subjects
Climate change
Colleges & universities
Glass substrates
Grain boundaries
Health hazards
Hydrogen sulfide
Natural gas
Perovskite
Safety standards
Sensors
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Summary:Strontium Titanate (SrTiO^sub 3^ (ST)) was prepared mechanochemically from Sr(OH)^sub 2^ and TiO^sub 2^. XRD confirms the Perovskite phase of material. Thick films of ST were prepared by screenprinting technique. The gas sensing performances of thick films were tested for various gases. It showed maximum sensitivity to CO gas at 350°C for 100 ppm gas concentration. To improve the sensitivity and selectivity of the film towards a particular gas, ST thick films were surface modified by dipping them in a solution of nano copper for different intervals of time. These surface modified ST films showed larger sensitivity to H^sub 2^S gas (100 ppm) at 300°C than pure ST film. A systematic study, of sensing performance of the sensor, indicates the key role-played by the nano copper species on the surface .The sensitivity, selectivity, response and recovery time of the sensor were measured and presented. [PUBLICATION ABSTRACT]
ISSN:2306-8515
1726-5479