Abstract
Thick film of silver decamolybdate (Ag6Mo10O33) was screen printed and thin film of chromium titanate Cr1·8Ti0·2O3+δ was laser deposited on alumina substrates. Morphological features of the films were characterised and ammonia sensing properties were studied. Resistance of Ag6Mo10O33 thick films decrease on introduction of NH3 gas and these films were capable of sensing 2 ppm of ammonia in air at 578 K. Cr1·8Ti0·2O3+δ thin films could sense 20 ppm of ammonia in air at 673 K, which exhibited increase in resistance towards NH3 gas.
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