A 2-COLOR SPATIAL-SCANNING PYROMETER FOR THE DETERMINATION OF TEMPERATURE PROFILES IN COMBUSTION SYNTHESIS REACTIONS

This article describes a new two-color pyrometer able to obtain multip le temperature reading using charge couple device type sensors. The de vice was tailored to fit the characteristics of self-propagating high- temperature synthesis processes in order to be able to detect temperat ure profiles and propagation rates of the combustion front. The light intensities at the two working wavelengths and the relative temperatur e profile are detected in 512 or 1023 points on the sample surface. Th e time between the acquisition of two profiles can be varied between 1 00 ms and 10 s. The pyrometer is interfaced with the BUS of a PC and i s fully software programmable. The constructive details, procedure for sensors alignment, and temperature calibration are described,Few exam ples of applications are discussed. (C) 1995 American Institute of Phy sics.