Method for improving the radiative performance of an infrared emitter and method of manufacturing the same

摘要

Process for improving radiative performances of thermal radiation emitter (IR) is based on an electric resistance embedded in a refractory material, and comprises: adding to the refractory material a substance chosen from polarographic black oxides having a normal spectral emissivity (measured in a perpendicular direction relatively to the material surface), in the spectral range 0.5-30 micro m, greater than the one of the refractory material and close to 1. Independent claims are also included for (1) a similar process for manufacturing an IR thermal radiation emitter and comprising pressing and sintering a refractory powder containing an electric resistance and coated with a substance of a normal spectral emissivity, in the range 0.5-30 micro m, greater than the one of the refractory material and close to 1; and for (2) a thermal radiation emitter made as above.