Radiance temperatures (in the wavelength range 527 to 1500 nm) of palladium and platinum at their melting points by a pulse-heating technique

The radiance temperatures (at seven wavelengths in the range 527 to 1500 nm ) of palladium and platinum at their respective melting points were measure d by a pulse-heating technique. The method. based on rapid resistive self-h eating of a specimen from room temperature to its melting point in less tha n 1 s, used two high-speed pyrometers to measure specimen radiance temperat ures every 9.5 ms during the heating and melting period. Melting was manife sted by a plateau in the radiance temperature-versus-time function for each wavelength. The melting-point radiance temperatures for a given specimen w ere 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 fbr several specimens at each wavelengt h are as follows.