EKHI
The open database of optical and radiative data
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Publications: 167 Total entries: 1251
Resistance, emissivities and melting point of tantalum
L. Malter, D. B. Langmuir
The relation between true and brightness temperatures of tantalum was determined by means of pyrometric observations on the inside and outside of a long thin-walled tube heated electrically. The brightness temperature as a function of heating current was determined by …
2 entries
TANTALUM: Hemispherical total emittance
Total radiation from polished and from soot-covered nickel
B. T. Barnes
Total radiation data were obtained on polished nickel and on the same metal when covered with soot. Temperatures below the range of an optical pyrometer were determined from a log-resistance vs log-temperature curve obtained from resistance measurements on the wire …
4 entries
Spectral and total thermal emissivities of oxide-coated cathodes
George E. Moore, H. W. Allison
No abstract provided
34 entries
NICKEL: Normal spectral emittance, Hemispherical total emittance
The temperature scale and the melting point of molybdenum
A. G. Worthing
Spectral emissivities and temperature scales of Mo from 300°to 2900°K. A tubular filament of pure Mo was made by winding ribbon in a close helix about 15 mm long and 1 mm in diam. Spectral emissivities were then obtained by …
2 entries
Spectral emissivity, total emissivity, and thermal conductivity of molybdenum, tantalum, and tungsten above 2300°k
Robert D. Allen, Louis F. Glasier Jr., Paul L. Jordan
The emissivities and thermal conductivities of high purity arc melted molybdenum and tantalum and powder metallurgy tantalum and tungsten were measured between 2300°K and their respective melting points. A method is presented for the determination of spectral and total emissivities …
9 entries
TANTALUM: Normal spectral emittance, Hemispherical total emittance
TUNGSTEN: Normal spectral emittance, Hemispherical total emittance
Some measurements of the total emissivity of metals and pure refractory oxides and the variation of emissivity with temperature
A. H. Sully, E. A. Brandes, R. B. Waterhouse
A method has been described for the rapid determination of the total emissivity of metals and oxides in the temperature range 300-800°C. Values have been obtained for lampblack and polished platinum and also for Nimonic 75, pure nickel, and stainless …
36 entries
[NICKEL + CHROMIUM + ƩXi] ALLOYS: Normal spectral emittance
CERIUM DIOXIDE CONTACT COATINGS: Normal total emittance
THORIUM DIOXIDE CONTACT COATINGS: Normal total emittance
NICKEL: Normal total emittance
PLATINUM: Normal total emittance
MAGNESIUM OXIDE CONTACT COATINGS: Normal total emittance
SILICON DIOXIDE CONTACT COATINGS: Normal total emittance
ALUMINUM OXIDE CONTACT COATINGS: Normal total emittance
ZIRCONIUM OXIDE CONTACT COATINGS: Normal total emittance
The temperature scales of Columbium, thorium, rhodium and molybdenum at 0.667μ
L. V. Whitney
To establish temperature scales for columbium, thorium, rhodium and molybdenum spectral emissivities were measured for these metals at λ=0.667μ. The Mendenhall V wedge was used for columbium and rolled cylinders were used for the other metals. Rolled cylinders were more …
3 entries
THORIUM: Normal spectral emittance
NIOBIUM: Normal spectral emittance
Spectral emissivities of tantalum, platinum, nickel and gold as a function of temperature, and the melting point of tantalum
A. G. Worthing
Spectral emissivities of Ta at 0.665μ and 0.463μ have been determined by (a) the tubular filament, (b) the reflectivity and (c) the comparison at contact methods. For 0.665μ the smoothed values at 300°K, 1500°K, and 2700°K are 0.493, 0.438, and …
24 entries
PLATINUM: Normal spectral emittance
TANTALUM (continued): Normal spectral emittance
The Spectral Emissivity of Iron and Cobalt
H. B. Wahlin, Harry W. Knop Jr.
The spectral emissivity of iron and cobalt has been determined as a function of the temperature. Sharp, definite changes in the emissivity have been observed in iron at the A3 and A4 point and at the Curie temperature for cobalt. …
2 entries
COBALT: Normal spectral emittance
Emissivities and temperature scales of the iron group
H. B. Wahlin, Rufus Wright
The temperature scales have been determined for well-degassed specimens of the iron group and from these the emissivity for λ = 0.667μ is calculated. Over the range of temperatures covered the emissivity is nearly a constant except at the A3 …
2 entries
COBALT: Normal spectral emittance