PREPARATION OF VO2 POWDER AND ITS PHASE TRANSITION CHARACTERS
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摘要: 介绍了一种新颖的、简单易行的二氧化钒粉末制备方法,以VOSO4为原料,水解后获得VO(OH)2沉淀,将沉淀清洗、干燥后,对其进行真空热处理,即获得VO2粉末。该方法工艺控制简单,稳定性好,容易掌握。通过对试样的XRD、XPS分析表明,试样为较纯的VO2粉末。试样的相变电、光开关性能测试表明,相变前后试样的电阻值变化了近两个数量级,中红外光学透过率变化了15%。Abstract: VO2 powders were prepared by a new and simple method, which used VOSO4 as raw material to form VO(OH)2 sediment through hydrolysis process, then clean and dry the VO(OH)2 sediment, VO2 powders is produced by vacuum annealing process. XRD and XPS testing to the synthesized product show the VO2 content in the samples approach 100%. The electrical and optical switching properties were tested, and the results show the resistance changed near two orders of magnitude and mid-IR transmissivity changed 15% because of the phase transition.
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Key words:
- VO2 /
- powder /
- preparation /
- phase transition properties
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