Preparation and performance of iron chromium based high temperature infrared radiat coating
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摘要: 自制了包括铁铬系辐射粉料、 粘结剂、 添加剂、 助烧剂的高温红外辐射涂料, 并对涂料进行了烧结实验; 利用热重差热分析和SEM、 XRD分析对涂料烧结过程中的显微结构变化及物相组成进行了研究, 利用电子探针对涂层与高铝耐火砖的结合界面进行了线扫描分析。测试结果表明, 涂料经1500 ℃烧结后, 辐射粉料以尖晶石相分散在铝硅基体相中; 涂料在2~18 μm的平均辐射率达到0.89。电子探针线扫描分析和热震实验显示, 该涂料与耐火砖形成牢固的结合层, 使涂层具有良好的抗热震性。Abstract: A high temperature infrared radiat coating for energy saving was developed with iron chromium based high emissivity powder, binder, additives and sintering aids. The coatings were sintered at different temperatures. The changes of microstructures, phase compositions and the bonding interface between the coating and firebrick were investigated by thermal analysis, SEM, XRD and electron microprobe analysis. The results indicate that the spinel phase formed by iron chromium based high emissivity powder is uniformly distributed in the Al-Si matrix phase, the entire infrared radiation emissivity of the coating is 0.89.The electron microprobe analysis and thermal shock tests show high bonding strength between the coating and the firebrick.
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Keywords:
- infrared radiation coating /
- bonding strength /
- emissivity /
- thermal shock resistance
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