Radiance Temperatures (in the Wavelength Range 527 to 1500 nm) of Palladium and Platinum at Their Melting Points by a Pulse-Heating Technique

Published

July 1, 1999

Author(s)

J L. McClure, A Cezairliyan, E Kaschnitz

Abstract

The radiance temperatures (at seven wavelengths in the range 527 to 1500 nm) of palladium and platinum at their respective melting points were measured by a pulse-heating technique. The method, based on rapid resistive self-heating a specimen from room temperature to its melting point in less than 1 s, used two high-speed pyrometers to measure specimen radiance temperatures every 0.5 ms during the heating and melting period. Melting was manifested by a plateau in the radiance temperature-versus-time function for each wavelength. The melting-point radiance temperatures for a given specimen were determined by averaging the measured temperatures along the plateau at each wavelength. The melting-point radiance temperatures for each metal as determined by averaging the results for several specimens at each wavelength. Based on uncertainties arising from pyrometry and specimen conditions, the expanded uncertainty (twostandard-deviation level) is about 7 K for the reported values in the range 527 to 900 nm and is about 8 K for the reported values at 1500 nm.

Citation

International Journal of Physics

Volume

20

Issue

No. 4

Pub Type

Journals

Keywords

emissivity (normal spectral), high temperature fixed points, high-speed pyrometry, melting, palladium, platinum, pyrometry, radiance temperature

Citation

McClure, J. , Cezairliyan, A. and Kaschnitz, E. (1999), Radiance Temperatures (in the Wavelength Range 527 to 1500 nm) of Palladium and Platinum at Their Melting Points by a Pulse-Heating Technique, International Journal of Physics (Accessed April 19, 2024)