SUN Guoliang, ZHANG Kuo

（School of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001）

Abstract: In this paper, The influences of firing atmosphere and cooling modes on the infrared emissivity of 8～14μm band was discussed in the (1 -x) Fe₂O₃·xMnO₂ system; The sample which had the highest infrared emissivity then was doped by various metal oxides and the experiment was optimized by the table of orthogonal experiments. The research showed that the infrared radiation properties of samples could be improved by sintering under reducing atmosphere and fast cooling in the air. The sample containing 20wt% Fe₂O₃ had the highest infrared radiation property and the infrared emissivity came to 0.869 in the(1 -x) Fe₂O₃·xMnO₂ system; when it was doped with 7wt% CuO, 6wt% Cr₂O₃, 6wt% Co₂O₃ and 8wt% Ni₂O₃, the infrared emissivity of 0.951 was reached in the optimum technical conditions.

Keywords: infrared radiation ceramic, spinel, emissivity, doping