Using spectral distribution of radiance temperature and relative
emissivity for determination of the true temperature of opaque materials
S.P. Rusin
Joint Institute for High Temperatures RAS,
Moscow, Russia
E-mail: sprusin@mail.ru
Keywords: true temperature, spectrum of thermal radiation, relative emissivity
Abstract
A method for determining
the thermodynamic (true) temperature of opaque materials by the registered
spectrum of thermal radiation under the conditions when we do not know
emissivity of a free-radiating body is presented. A special function,
which is a product of relative emissivity of tungsten by the radiation
wavelength, was used as the input data. The accuracy of results is analyzed. It
is shown that when using relative emissivity, the proposed algorithm can be
used both within the range of applicability of the Wien approximation and the
Planck formula.
DOI: 10.1134/S0869864318010122
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