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通过溶胶-凝胶燃烧法制备了具有立方相的尖晶石型NiCr2O4颜料,并采用TG/DSC、XRD、FTIR和SEM等手段对其进行表征和研究。结果表明:将燃烧后的粉末于900℃下煅烧2 h可以得到单一相的NiCr2O4,温度达不到900℃时所得粉末(包括燃烧后粉末和500和700℃煅烧得到的粉末)为NiO和Cr2O3组成的混合物。利用紫外/可见/近红外分光光度计仔细研究了燃烧后粉末和煅烧后粉末的颜色参数。尽管具有相同的成分,500和700℃下煅烧得到的粉末与燃烧后粉末却具有明显不同的颜色,这可从一氧化镍为非整比化合物的角度加以解释。此外,900和1 000℃下煅烧得到的NiCr2O4粉末呈现出随温度变化的绿色。
The spinel NiCr2O4 with cubic phase was prepared by sol-gel combustion method and characterized by TG / DSC, XRD, FTIR and SEM. The results show that the single phase NiCr2O4 can be obtained by calcining the calcined powder at 900 ℃ for 2 h. The obtained powder (including the calcined powder and the calcined powders at 500 and 700 ℃) at lower than 900 ℃ is NiO and Cr2O3 The composition of the mixture. The color parameters of the post-combustion powder and the calcined powder were carefully examined using a UV / VIS / NIR spectrophotometer. Despite having the same composition, the calcined powders at 500 and 700 ° C have significantly different colors from the post-combustion powder, which can be explained from the point of view that nickel monoxide is a non-integral compound. In addition, the NiCr2O4 powders calcined at 900 and 1000 ° C showed green with temperature change.