Temperature of the Surface of Powders in Experiments with Chain Plasma-Chemical Reactions Initiated by the Radiation of a Gyrotron in Pd + Al.sub.2O.sub.3 Mixtures

Results are presented of the determination of the temperature of the surface of powders in experiments on plasma-chemical synthesis of micro- and nanosize structures in the mixtures of aluminum oxide Al.sub.2O.sub.3 and palladium Pd with different palladium concentrations. The obtained estimates of surface temperature (2400-3100 K) are between the melting and boiling points at atmospheric pressure of the components of the powder mixture Al.sub.2O.sub.3 and Pd, which creates suitable conditions for the ignition of self-sustained (chain) plasma-chemical reactions.