Sensitivity of screen printed WO3 thick film chemiresistance gas sensor with alteration in firing temperature

Kaveri B. Bhamare

WO3, screen printing, SEM, XRD, resistivity.

The main aim of the study was to find the effect of firing temperature on the nature of tungsten trioxide thick film prepared by screen printing process for gas sensing application. X-Ray diffraction is used to examine the phases formed after firing. XRD result shows a mixture of monoclinic, orthorhombic phases of WO3 in the range 600°C-800°C. The morphology was analyzed by SEM-EDS. The D.C. resistance of the films was measured by half bridge method in air atmosphere in 30°C to 450°C temperature range. The WO3 films showed semiconducting nature. The temperature coefficients of resistance, activation energy, sheet resistivity and surface area to volume ratio of films were assessed at different firing temperatures. Surface area to volume ratio decides the gas sensing property of the film. The cause of the enhancement of gas sensitivity of the sample for target gas with high surface area to volume ratio was also discussed. Gas sensing property ameliorates for greater ratio. Film fired at 600°C has maximum ratio hence found to be suitable for gas sensing.

Published Paper   E-Certificate

"Sensitivity of screen printed WO3 thick film chemiresistance gas sensor with alteration in firing temperature", IJSDR - International Journal of Scientific Development and Research (www.IJSDR.org), ISSN:2455-2631, Vol.6, Issue 1, page no.262 - 268, January-2021, Available :https://ijsdr.org/papers/IJSDR2101042.pdf

Volume 6 Issue 1, January-2021

Pages : 262 - 268

Paper Reg. ID: IJSDR_193585

Published Paper Id: IJSDR2101042

Downloads: 000347171

Research Area: Engineering

Country: -, -, -

Published Paper PDF: https://ijsdr.org/papers/IJSDR2101042

Published Paper URL: https://ijsdr.org/viewpaperforall?paper=IJSDR2101042

ISSN: 2455-2631 | IMPACT FACTOR: 9.15 Calculated By Google Scholar | ESTD YEAR: 2016

An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 9.15 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator

Publisher: IJSDR(IJ Publication) Janvi Wave

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