Effect of heat treatment on the characteristics and NH3 Sensing properties of Tin Dioxide SnO2 Thin Film

In this research, Spray pyrolysis technique used to prepared Tin dioxide (SnO2) thin films on glass substrate with thickness about 200± 8 nm by dissolved 2.2563 g of SnCl2.2H2O in 100 ml ethanol then added 60 drops from concentrated hydrochloric acid (HCl). After that the were annealed at different temperatures (300, 400 and °C ). X-ray analyses shows structure all SnO2 is polycrystalline tetragonal rutile crystalline preferential orientation direction (200).