AMMONIA GAS(NH3) SENSING OF SnO2-CuO MIXED OXIDE THICK FILM AT OPERATING TEMPERATURE
Keywords:Ammonia gas, SnO2-CuO, Sensors, operating temperature, X-Ray Diffraction, TGDTA
Objective To develop ammonia gas sensor by SnO2-CuO Mixed oxide thick film which is highly sensitive at particular optimum temperature.
Materials and Methods:The SnO2 and CuO powder mixed with different ratio and heated at 8000C and then this powder is used to prepared thick
films by a screen – printing technique on glass substrate.
Results:The NH3 gas sensing properties, preferably the rate of response of CuO-SnO2 sensors are influenced by the CuO doping and operating
temperature. XRD analysis showed that crystallite size is small (97.3nm) for 50SnO2-50CuO composition. Thermal analysis (TG/DTA) is the calculate
of change in weight and energy in the form of heat as the material is being cooled or heated at a constant rate. The resistance change per ppm is found
to be 82 MΩ for SA5 sample.
Conclusion : 50SnO2-50CuO composition sample is optimize for better sensing material as regards to other.
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