Abstract: Using transition metal oxides as raw materials, a novel infrared radiation material with spinel structure was developed by solid-state reaction process. Then, the composite infrared radiation ceramics were prepared using the obtained infrared radiation material and cordierite by high-temperature solid-state calcination process, which was then mixed with silicate binder to formulate the infrared radiant coatings. The physical and chemical properties microstructures and phases of the obtained coatings were characterized by x-ray diffraction (XRD) and infrared radiation test. The results showed that high-temperature calcination could not produce significant solid-state reaction between the obtained spinel structure powder and, cordierite, which was beneficial to keep the stability of phase structure and infrared emissivity when used at high temperature The prepared coating systems exhibited an infrared emissivity of about 0. 88 in the band of 2.5-5 μm and above 0. 9 in the band of 6 ~15 μm. Besides, the coating showed an excellent thermal shock resistance and energy saving performance.

Key words: high emissivity, infrared radiation, energy-saving coatings

摘要： 以尖晶石结构的红外陶瓷粉料和堇青石高温焙烧制备复合红外辐射陶瓷粉料,然后与硅酸盐粘接剂混合配制涂料。用SEM、XRD和红外辐射测试等方法对复合红外辐射陶瓷粉料的结构、物相和涂层的红外辐射性能进行了表征。结果表明:经高温焙烧后具有尖晶石结构的粉料与堇青石之间未产生明显的高温固相反应,这有利于在高的工作温度下红外辐射涂层保持其物相结构和红外辐射性能的稳定。涂层在2.5~5μm波段平均辐射率为0.88,6~15μm波段辐射率达到0.9以上,而且具有良好的耐热震稳定性和节能效果。

关键词: 高辐射率, 红外辐射, 节能涂料