Spectral Emissivity & Emittance

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 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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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…”

“Normal spectral emittance of vanadium and tantalum for different surface conditions at temperatures above 1000 K”

By: Dorab N. Baria¹ and Renato G. Bautista²
(1) Department of Chemical Engineering, University of North Dakota, 58201 Grand Forks, North Dakota
(2) Department of Chemical Engineering and Group Leader, Ames Laboratory-USAEC, Iowa State University, 50010 Ames, Iowa

Journal: Metallurgical and Materials Transactions B
Publisher: Springer Boston
ISSN 1073-5615 (Print) 1543-1916 (Online)
Issue Volume 5, Number 7 / July, 1974
DOI 10.1007/BF02646324
Pages 1543-1546
Subject Collection Chemistry and Materials Science
SpringerLink Date Friday, June 15, 2007

ASTM E423 - 71(2002) Standard Test Method for Normal Spectral Emittance at Elevated Temperatures of Nonconducting Specimens

Developed by Subcommittee: E21.04 |Book of Standards Volume: 15.03

“1. Scope

1.1 This test method describes an accurate technique for measuring the normal spectral emittance of electrically nonconducting materials in the temperature range from 1000 to 1800 K, and at wavelengths from 1 to 35 m (microns?). It is particularly suitable for measuring the normal spectral emittance of materials such as ceramic oxides, which have relatively low thermal conductivity and are translucent to appreciable depths (several millimetres) below the surface, but which become essentially opaque at thicknesses of 10 mm or less…”

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“2. Referenced Documents

E349 Terminology Relating to Space Simulation

Index Terms
emittance; infrared emittance; material radiative property; radiative heat transfer; spacecraft thermal control; spectral normal emittance; thermal radiation; ICS Number Code 49.025.01″