Preparation and characterization of VO2 Nano- powder by Thermal Decomposing VOC2O4·H2O
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摘要: 研究了一种在350℃分解草酸氧钒前驱体(VOC2O4·H2O,草酸还原工业V2O5粉的产物)来制备纳米VO2粉末的方法。采用TG-DSC、XRD、TEM及电阻—温度仪等测试手段对所得粉末进行了测试分析,实验结果表明:所得VO2粉末呈结晶态,组分单一,粒径为80~120 nm,相变温度为68.5℃,电阻突变量约3个数量级。Abstract: A method of synthesizing VO2 nano-powder by decomposing VOC2O4·H2O(which was made from commercial V2O5 powder deoxidized by oxalic acid) in vacuum oven pipe at 350 ℃ was developed.The powder was characterized by means of thermal analysis(TG-DSC),X-ray diffraction spectroscopy(XRD),transmission electron microscope(TEM) and resistance-thermometer.The results show that the powder is crystallized,the component is only VO2,the average particle size is 80~120 nm,its phase transition temperature is 68.5 ℃,and its resistance abrupt change reaches three magnitudes.
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Key words:
- VO2 nano- powder /
- commercial V2O5 powder /
- VOC24·H2O /
- thermal decomposition
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