采用固相法制备了一种具有较高近红外反射特性的新型无机颜料CaCu(3-x)ZnxTi4O12。用XRD、色差仪和紫外-可见光-近红外分光光度计等对产物的结构、颜色和反射特性进行研究。结果表明，随着取代程度的增加，晶体的结构由单相变为多项。随着Zn2+离子掺杂量增加（x=0.00～0.06），带隙宽度从2.16eV增加到2.26eV，黄色度从22.35增加到29.62，近红外反射比从52.3%增加到62.3%。CaCu3Ti4O12和CaCu2.4Zn0.6Ti4O12颜料涂层的近红外反射比分别为46.4%和55.2%。并且该颜料还具有良好的化学稳定性和热稳定性。这些事实表明CaCu(3-x)ZnxTi4O12颜料在冷涂层中有着很大的应用潜力。

This paper adopted conventional solid state reaction route to prepare a new-type inorganic pigment CaCu(3-x)ZnxTi4O12 with high near-infrared reflective properties. The structure, colour and reflective properties were investigated by XRD, Color-Eye automatic differential colorimeter and UV-vis-NIR spectrophotometer. Result showed that crystal structure changed from single phase to multi-phase with the increase of substitution degree. With the increasing of doping amount of Zn2+ ions(x=0.00-0.06), the band gap increase from 2.16eV to 2.26eV, the yellow hue b* increases from 22.35 to 29.62, and the near infrared reflectance ratio increases from 52.3% to 62.3%. The near-infrared reflectance of CaCu3Ti4O12 and CaCu2.4Zn0.6Ti4O12 pigments coating are 46.4% and 55.2% respectively. The pigments also have chemical stability and thermal stability. Therefore, the prepared CaCu(3-x)ZnxTi4O12 pigments have great application potential in “cool colorant”.