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采用共沉淀法制备了四元体系ZnO-Fe2O3-Na2O-P2O5作为太阳热反射材料.用紫外-可见光-近红外分光光度计、XRD对产物进行表征.结果表明:当Zn/Fe摩尔比为9.00、在700℃下煅烧时,产物的物相组成随Zn/P摩尔比(1.52、1.02、0.76、0.61)而变化,其中Zn/P摩尔比为0.61的产物为空间群P21/n的单相NaZnPO4结构,其余Zn/P摩尔比下的产物为多相结构;当Zn/P摩尔比为0.61、在700℃下煅烧时,不同Zn/Fe摩尔比(19.00、9.00、5.67、4.00)的产物均为单相NaZnPO4结构,且随Zn/Fe摩尔比降低,产物颜色加深,反射比降低;当Zn/P摩尔比为0.61、Zn/Fe摩尔比为9.00时,500～800℃煅烧温度范围内的产物均为单相NaZnPO4结构,且随煅烧温度增加,产物颜色加深,反射比降低,其中,600℃煅烧产物呈橘红色且近红外波段反射比为80.7%,700℃煅烧产物呈红色且近红外波段反射比为72.2%.
The quaternary system ZnO-Fe2O3-Na2O-P2O5 was prepared as the solar heat-reflective material by coprecipitation method.The product was characterized by XRD with UV-Vis-NIR spectrophotometer.The results showed that when the Zn / Fe molar ratio was 9.00 , The phase composition of the product changes with the Zn / P molar ratio (1.52,1.02,0.76,0.61) when calcined at 700 ℃. The product with the Zn / P molar ratio of 0.61 is the single phase of space group P21 / n NaZnPO4. The products of other Zn / P molar ratios were multiphase. When Zn / P molar ratio was 0.61 and calcined at 700 ℃, the products with different ratios of Zn / Fe (19.00,9.00,5.67,4.00) The results showed that when Zn / P molar ratio was 0.61, Zn / Fe molar ratio was 9.00, calcination temperature ranged from 500 ℃ to 800 ℃ Of the products are single-phase NaZnPO4 structure, and with the increase of calcination temperature, the color of the product is deepened and the reflectance is decreased. The products calcined at 600 ℃ are orange-red and the reflectance in the near infrared band is 80.7%. The products calcined at 700 ℃ are red and near Infrared reflection ratio was 72.2%.