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Factors Determining the Carbon Monoxide Sensing Properties of Tin Oxide Thick Films Calcined at Different Temperatures
Author(s) -
Song KugHyun,
Park Soon Ja
Publication year - 1994
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1994.tb04527.x
Subject(s) - calcination , carbon monoxide , tin oxide , analytical chemistry (journal) , oxygen , tin , oxide , materials science , carbon fibers , chemistry , mineralogy , metallurgy , composite material , environmental chemistry , organic chemistry , catalysis , composite number
Effects of calcinations temperature on the gas‐sensing properties of SnO 2 thick films were explored by measuring the variations in resistance with CO concentration. As the calcining temperature increased from 500° to 1100°C, the absolute values of the slopes in the log (concentration)vs log (resistance) curves gradually decreased from −0.9 to −0.2. The data were analyzed with the equations proposed by Madou and Morrison. It was suggested that the reduction in the formation rate of oxygen adsorbates was responsible for the decrease in the absolute slope, and hence a relatively high sensitivity was attained in a low gas concentration with a largely crystallizes sample.