| 尖晶石型NiCr2O4的燃烧法合成及表征(英文) | |
| Combustion Synthesis and Characterization of Spinel NiCr2O4 | |
| 摘要: 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。 | |
| 关键词: 燃烧合成法 尖晶石型NiCr2O4 颜色 晶体生长 | |
| 基金项目: | |
| Abstract: Cubic spinel NiCr2O4, as a pigment, was synthesized via a sol-gel combustion method and characterized using TG/DSC, XRD, FTIR and SEM techniques. The results reveal that a single-phase NiCr2O4 with the cubic structure is obtained after heat treatment of the as-burnt powder at 900 ℃ for 2 h. The powders obtained below 900 ℃ appear as a mixture of NiO and Cr2O3. The color parameters for the as-burnt powder and the powder calcined at various temperatures were studied using PerkinElmer Lambda 950 UV-Vis-NIR spectrometer. Although having the same compositions, the 500 and 700 ℃ calcined powders show a different color (black) from the as-burnt powder (black green). This phenomenon may be interpreted in terms of non-stoichiometry in NiO crystals. Moreover, the as-prepared spinel NiCr2O4 powders calcined at 900 and 1 000 ℃ show green color which changes with the calcination temperature. | |
| Keywords: combustion synthesis spinel-type NiCr2O4 color crystal growth | |
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| 耿庆芬,赵 鑫,高祥虎,杨生荣,刘 刚.尖晶石型NiCr2O4的燃烧法合成及表征(英文)[J].无机化学学报,2012,28(9):1979-1984. | |
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