Effect of Microwave Heating on Infrared Radiation Properties of Cordierite-Ferrites Based Composite Ceramics

摘要

The cordierite-ferrites based infrared radiation composite materials were synthesized with Fe2O3, MnO2, CuO, Co2O3, and Mg2Al4Si5O18 powders as raw materialsvia microwave heating. The cordierite-ferrites based composite ce-ramics could be obtainedvia microwave heating at 1173 K for 1 h or 1473 K for 10 min, respectively. The lower synthe-sis temperature or the shorter heating time results in the smaller grain size of the composite ceramics obtained by mi-crowave heating. The interplanar distance of cordierite becomes greater after microwave heating, indicating that the doping effect of transitional metal oxides on the cordierite is more efficient in microwave heating. The infrared radiation composite ceramics synthesized by microwave heating at 1473 K for 1 h exhibit the maximum emissivity of 0.9 in the band range of 6-8μm at 1073 K.