Proceedings PaperOptical Properties Of Thin Film Refractory Metals
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Molybdenum thin films have been produced by chemical vapor deposition with an emittance(calculatedat 500°C) which is at least as low as the emittance of the pure, bulk metal (0.069). Tungsten films deposited by CVD have an emittance of 0.045 as compared to 0.019 reported for the bulk metal. These experimental results indicate the potential usefulness of CVD Mo or W thin films as infrared reflectors in tandem layer, spec-trally selective, solar absorber systems. In addition, a spectrally selective CVD thin film which consists of a mixture of Mo and Mo03 phases has been deposited which has a solar absorptance of 0.74 and a calculated emittance at 500°C of 0.063.