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Subsecond measurements of the optical properties in the spectral range 0.4–1.1 μm near high-temperature transformations of samarium oxide

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Abstract

A new dynamic method is described for measuring the spectral directional-hemispherical reflectivity in the spectral range 0.4–1.1 μm near high-temperature phase transformations of refractory materials. The use of diffuse sample irradiation enables one to exclude the influence of an abrupt variation of the angular reflection distribution of sample surface at the phase transitions. The experimental results on samarium oxide showed that light pulses are emitted by the sample during the high-temperature transformations.

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Salikhov, T.P., Kan, V.V. Subsecond measurements of the optical properties in the spectral range 0.4–1.1 μm near high-temperature transformations of samarium oxide. Int J Thermophys 14, 555–564 (1993). https://doi.org/10.1007/BF00566052

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Key words

  • optical properties
  • phase transformation
  • polychromatic diffuse irradiation
  • reciprocity principle
  • samarium oxide
  • spectral reflectance
  • transformation temperature