Durability of Ag based low-emissivity coatings

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Abstract
Films of ZnO/Ag/Sn/ZnO deposited by dc magnetron sputtering are being widely used as ‘‘heat mirror’’ films in architectural applications. The long-term durability of these films has been studied through accelerated weathering and exposure to controlled atmospheres of C12, H2S, and moisture. After accelerated exposure, films were analyzed by ultraviolet–visible–near infrared and far infrared spectroscopy, Auger depth profiling, and scanning electron microscopy. No significant changes were seen in transmittance or infrared reflectivity. No interdiffusion of layers was seen in Auger profiling.

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