钴蓝包覆空心玻璃微珠颜料制备及热反射性能研究

Study on preparation of Co-blue pigment hollow glass microspheres composites and properties of heat reflection

采用水浆混合烧结法——空心玻璃微珠与钴蓝微纳粉水浆混合并在620℃烧结,制备核壳型结构钴蓝包覆空心玻璃微珠,并作为彩色热反射颜料。以SEM、XRD分析表征钴蓝包覆空心玻璃微珠的结构特点,紫外可见近红外分光光度计和傅立叶红外光谱仪测试该种材料制成的有机硅涂层的太阳光反射比和中红外反射比。结果显示:球磨后钴蓝平均粒度约为400 nm;钴蓝包覆在空心玻璃微珠表面,形成颜料壳层;包覆粉末制成的有机硅涂层的太阳光反射比明显优于钴蓝涂层,尤其在波长400~500 nm和1000~2500 nm太阳光谱波段,显示出多界面结构颜料热反射优势。在波长8~14μm红外波段,涂层的吸收率超过90%,该种包覆材料可作为彩色冷颜料。

Core-shell structure Co-blue hollow glass microspheres（HGMs） composites with high heat reflection were prepared as color heat reflective paint. Hollow glass microspheres were mixed with Co-blue sub-micro powder slurry which was prepared by water slurry mixed sintering method and sintering at 620 ℃. The structures and characteristics of the core-shell Co-blue HGMs were characterized by SEM,XRD. A composite coating was prepared by this kind of materials. Reflective ratio of solar and infrared on Co-blue HGMs-SR composites coatings were investigated using UV-Vis-NIR and FTIR spectrometer.The results show that the average size of the oxide particles is 400 nm. The Co-blue HGMs-SR formed a pigment shell because of cladding on the surface of hollow glass microspheres. The reflectance value of the Co-blue HGMs-SR composites coatings is better than the Co- blue pigment-SR coating. Especially, between bandwidth of 400-500 nm and 1000-2500 nm of solar spectrum,indicating the advantage of multi-interface structure composites in solar-reflectance properties. The absorption are more than 90% in the infrared wavelength range of 8-14 μm,which indicated that core-shell Co-blue HGMs can be applied as a good color cool pigment.