Abstract
In this paper, the effect of MnO2 addition the infrared emissivity on ZrO2-Al2O3-SiO2 low thermal conductivity materials was investigated. The phase and microscopic morphology of the samples with the heat treatment at different temperatures were characterized by XRD and SEM. The results show that the infrared emissivity of ZrO2-Al2O3-SiO2 materials increased nearly 7% to 0.911 by adding 10 wt% MnO2. After heat treatment at different temperature, the main phase of ZrO2-Al2O3-SiO2 materials were t-ZrO2 and mullite, ZrO2-Al2O3-SiO2 materials with MnO2 addition were molten and the phase composition was t-ZrO2, Al2O3, and m-ZrO2.
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