Infrared Spectral Emittance & Optical Properties of Yttrium Vanadate

Infrared Spectral Emittance and Optical Properties of Yttrium Vanadate
Phys. Rev. 169, 705 - 709 (1968)

by: H. E. Rast, H. H. Caspers, and S. A. Miller *
Infrared Division, Research Department, Naval Weapons Center Corona Laboratories Corona, California 91720

Received 13 November 1967
"ABSTRACT: The infrared spectral emittance E of single crystals of YVO₄ has been examined near 4.2 and 77°K in the wavelength range 4-125 micrometers..."
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* Formerly Naval Ordnance Laboratory, Corona, Calif.

DIRECTIONAL SPECTRAL EMITTANCE OF A PACKED BED...

DIRECTIONAL SPECTRAL EMITTANCE OF A PACKED BED WITH COUPLED CONDUCTION-RADIATION HEAT TRANSFER

Dominique Baillis
Centre de Thermique de Lyon (CETHIL), UMR CNRS 5008, Institut National des Sciences Appliquées de Lyon, France

Jean-Francois Sacadura
Centre de Thermique de Lyon (CETHIL), UMR CNRS 5008, Institut National des Sciences Appliquées de Lyon, France

ABSTRACT

Recently a new experimental set up for measuring the directional spectral emittance has been developed. The both sides of packed bed sample are simultaneously heated with identical power laser beams (4kw, CO² 10.6 um) and the isothermal condition in the medium is assumed. In this paper, the coupled conduction-radiation equations are considered to investigate the effect of the temperature non-uniformity on the calculated value of the emittance and to verify if the isothermal assumption is valid. It is shown that the gradient temperature in the medium can be non negligible depending on the thickness and on the sample extinction coefficient.

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Spectral emittance of nickel and oxide-coated nickel cathodes

The spectral emittance of nickel- and oxide-coated nickel cathodes
S L Martin et al 1950 Br. J. Appl. Phys. 1 318-324

"Abstract. The spectral emittance values at a wavelength ? = 0.66 ? have been measured for various types of oxide-coated cathode, and for nickel cores, using a cylindrical diffuse reflectometer..."