Ammonia sensing properties of thick and thin films of Ag₆Mo₁₀O₃₃ and Cr_1·8Ti_0·2O_3+δ

E. PrabhuLiquid Metals and Structural Chemistry Division, Indira Gandhi Centre for Atomic Research, Kalpakkam603 102, India

S. MuthurajaDepartment of Electronics and Instrumentation Engineering, Vellore Institute of Technology, Vellore632 014, India

K. I. GnanasekarLiquid Metals and Structural Chemistry Division, Indira Gandhi Centre for Atomic Research, Kalpakkam603 102, India

V. JayaramanLiquid Metals and Structural Chemistry Division, Indira Gandhi Centre for Atomic Research, Kalpakkam603 102, India

S. SivabalanDepartment of Electronics and Instrumentation Engineering, Vellore Institute of Technology, Vellore632 014, India

T. GnanasekaranLiquid Metals and Structural Chemistry Division, Indira Gandhi Centre for Atomic Research, Kalpakkam603 102, India

Abstract

Thick film of silver decamolybdate (Ag₆Mo₁₀O₃₃) was screen printed and thin film of chromium titanate Cr_1·8Ti_0·2O_3+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. Cr_1·8Ti_0·2O_3+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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Ammonia sensing properties of thick and thin films of Ag₆Mo₁₀O₃₃ and Cr_1·8Ti_0·2O_3+δ

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Ammonia sensing properties of thick and thin films of Ag₆Mo₁₀O₃₃ and Cr_1·8Ti_0·2O_3+δ