The total hemispherical emissivity epsilon ht of platinum in the temperature range 300-1200°C has been determined by a technique based on the Land hemispherical surface pyrometer. It is shown that epsilon ht of a low-emissivity material and its dependence on temperature can be measured conveniently, rapidly and precisely by this technique. The spectral hemispherical emissivity of platinum at 0.9 μm has been measured in the temperature range 900-1200°C.
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P R C Goard (1966) studied this question.
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