From the category archives:

Metals & Alloys

What the Heck is (Spectral) Emissivity?

February 10, 2010

Part One of Two from the mind of FLIR
It starts:
Fill two soda cans with hot water and wrap one with scotch tape. Which one will radiate more heat?
You might be surprised at the answer
(It has all to do with Spectral Emissivity, although this video continues the illusion that it’s really simple “Emissivity” at work! The [...]

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ASTM E307 – 72(2008) Standard Test Method for Normal Spectral Emittance

December 8, 2009

At Elevated Temperatures
Developed by ASTM Subcommittee: E21.04, on Space Simulation Test Methods, and in the Annual Book of ASTM Standards, Volume 15.0 Space Simulation; Aerospace and Aircraft; Composite Materials

Quoting from the standard’s Scope:
1. Scope
1.1 This test method describes a highly accurate technique for measuring the normal spectral emittance of electrically conducting materials or materials [...]

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Table of Emissivities in Three Popular Spectral Regions

May 9, 2009

The Table of Emissivity on the INFRAPOINT Messtechnik GmbH website (Click here to visit) has summary data for a wide variety of materials broken down into three distinct spectral regions for the wavelength regions where the majority of infrared radiation thermometers and Infrared Thermal Imaging cameras operate.
First and second are tables that deal with the [...]

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Thermophysical properties and normal spectral emittance of Iridium up to 3500 K

February 9, 2009

“Thermophysical properties and normal spectral emittance of Iridium up to 3500 K”,
International Journal of Thermophysics Vol. 28(2), p. 697-710, http://dx.doi.org/10.1007/s10765-007-0188-9, (2007) by C. Cagran, G. Pottlacher
C. Cagran1 and G. Pottlacher1 Contact Information
(1) Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria
Published online: 10 May 2007
“An ohmic pulse-heating experiment together with [...]

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STANDARDIZATION OF THERMAL EMITTANCE MEASUREMENTS. PART III.

July 21, 2008

NORMAL SPECTRAL EMITTANCE, 800-1400 K, Authors: Harrison, W.N. ; [...]

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Spectral emittance of nickel and oxide-coated nickel cathodes

June 5, 2008

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…”

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Normal spectral emittance of vanadium and tantalum…

May 30, 2008

“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 [...]

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Spectral emissivity of tungsten

April 11, 2008

Spectral emissivity of tungsten
Robert D. Larrabee
JOSA, Vol. 49, Issue 6, pp. 619-
Citation
R. D. Larrabee, “Spectral emissivity of tungsten,” J. Opt. Soc. Am. 49, 619- (1959)

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Spectral emissivity of rhenium

April 3, 2008

Spectral emissivity of rhenium
D. T. F. Marple
JOSA, Vol. 46, Issue 7, pp. 490-(1956)
Citation
D. T. F. Marple, “Spectral emissivity of rhenium,” J. Opt. Soc. Am. 46, 490- (1956)

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