Total normal and spectral emittance of refractory materials for high temperature ovens

  • Neuer G
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Abstract

A measurement device based on the radiation comparison technique is described. It enables us to measure the directional total and spectral emittance between 400°C and 1200°C in the wavelength range 0.5 μm to 8 μm and at angles of up to 72° against the normal to the surface. Measurements with different types of silica showed that the spectral emittance can be remarkably increased, especially at wavelengths below 5 μm, by adding small amounts of silicon carbide. This is important for the improvement in the efficiency of the heating at different types of furnaces. © 1993.

Author-supplied keywords

  • emittance measurement
  • refractory materials

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Authors

  • G. Neuer

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