钒氧化物微晶玻璃合成及相调控的前期探索研究

摘要VO2 在 340K 附近由低温半导体态转变为高温金属态时，红外透过率发生突变。掺杂 W 或 Mo 原子能使相变温度降低至室温，因此可以应用于智能温控领域。目前关于 VO2 的研究集中在薄膜上，而在玻璃内析出 VO2 微晶可以避免 VO2 薄膜易老化等问题。基于此问题，本文采用溶胶-凝胶法，尝试了硫酸氧钒(VOSO4)、乙二醇氧钒(C2H4O3V)两种前驱体，通过改变热处理制度对 VO2 微晶玻璃的制备进行了探索，并利用 XRD 和 Raman 等对其表征。实验结果表明对掺杂 VOSO4 的凝胶热处理可以制备 V2O5 纳米晶玻璃，由于 V2O5 晶被玻璃相包裹，故难以被还原而获得 VO2 微晶玻璃。另外可以利用偏钒酸钠、乙二醇混合后加热搅拌获得高纯的 C2H4O3V，但通过这种方法难以掺进 W，并且 C2H4O3V 在鼓风、180℃煅烧 40min 合成的 VO2 具有优良的热致相变特征。74250

毕业论文关键词 VO2 微晶玻璃热致相变智能温控溶胶-凝胶法

毕业设计说明书外文摘要

Title Preliminary study on synthesis and phase control of vanadium oxide glass-ceramic

Abstract Vanadium dioxide (VO2) has attracted much attention due to its distinct and reversible Metal-Insulator Transition (MIT) occurring around 340K,which leads to the large changes of infrared transmission。 The temperature of phase transition is lowered to room temperature by doping the element of W or Mo。 Therefore, VO2 can be applied to the field of intelligent temperature-control。 The research about VO2 focuses on the VO2 film at present ， which ages easily。 While the VO2 microcrystalls present in the glass can extend its service life。 This article is based on that。 The sol-gel method was adopted to synthesize the gel with vanadium compound。 And the vanadium oxide glass-ceramic had been explored by changing the heat treatment procedure on the gel。 Finally the product was characterized with XRD and other techniques。 Experimental results suggest that the proper heat treatment on the gel, which is doped with VOSO4 , is taked to synthesize V2O5 glass-ceramic instead of VO2 glass-ceramic。 In addition, pure vanadyl glycol (C2H4O3V) is prerared by heating the mixture of NH4VO3 and C2H6O2，but it is difficult to dope C2H4O3V with the element of W by this way。 VO2 is prepared by calcining C2H4O3V in the blast-air and has the excellent characteristic of thermotropic phase transition。

Keywords VO2 glass ceramic thermotropic phase transition intelligent temperature-control Sol-gel

本科毕业设计说明书第 I 页

1 引言 1

1。1 节能玻璃 1

1。1。1 节能玻璃简介 1

1。1。2 节能玻璃分类 1

1。2 二氧化钒 2

1。2。1 钒（V）及二氧化钒（VO2）简介 2

1。2。2 VO2 的相变性能 3

1。2。3 VO2 的应用钒氧化物微晶玻璃合成及相调控的前期探索研究:http://www.youerw.com/cailiao/lunwen_84788.html