Tungsten Trioxide Seed Hydrothermal Method

Tungsten trihydrate seed hydrothermal method, also known as high temperature solution method, including temperature difference method, cooling method. To improve the growth rate of tungsten oxide crystals, seed water and heat-assisted method generally uses dual temperature zone high pressure reactor. Mainly rely on the solution in the container to maintain the temperature convection to form a supersaturated state.

Tungsten trioxide seed hydrothermal method needs to select the appropriate mineralizer. At the same time, it is necessary to control the concentration of mineralizer, temperature and temperature difference in dissolving zone and growth zone, filling degree, pre-saturation in growth zone, reasonable element doping, temperature and temperature program, quality of seed crystal and purity of nutrient material Elements, optimize the various process conditions.

The hydrous tungsten trioxide nanodisk electrochromic thin film was prepared on the conductive glass by the seed-assisted hydrothermal method, which solves the problems of long reaction time and high reaction temperature of traditional seed hydrothermal assisted method. The study found that tungsten trioxide seed layers and urea play a key role in hydrothermal growth.

 When the tungsten trioxide is seedless, the prepared film is a flower-like structure composed of nanorods. When a layer of seed layer is prepared in advance by sol-gel method on the surface of the conductive glass, hydrothermal reaction can be carried out to obtain the porous structure films which are alternately arranged. The existence of urea can make the hydrous tungsten trioxide thin film prepared by seed-assisted hydrothermal method have stronger ion storage capacity, thus exhibiting greater light modulation range, faster response speed and higher coloring efficiency.

<img alt="Tungsten oxide pictureheight=" 220"="" data-cke-saved-src="http://news.chinatungsten.com/images/2018/06/WO324.jpg" src="http://news.chinatungsten.com/images/2018/06/WO324.jpg" title="Tungsten oxide picture" width="340">

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