Ammonium metatungstate powder is the main raw material for preparing violet tungsten oxide. The violet tungsten oxide nanopowder prepared can be used to produce a new type of thermal insulation dispersion liquid, that is, nano-ceramic dispersion solution.
According to experts, such dispersion solution can be used to produce transparent glass film for building glass, which has great thermal insulation performance and environmental protection performance. So, the violet tungsten oxide becomes the new focus of heat insulation material with broad application prospects.
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It can be seen that the raw material violet tungsten oxide is of great importance, which needs to be studied in depth. Generally, the preparation method is directly related to the performance of violet tungsten oxide, which should be emphasized. Therefore, the following is a preparation method of violet tungsten oxide: weigh 0.01mol of ammonium metatungstate, 0.36mol of ammonium nitrate, and 0.05mol of urea according to the reaction ratio. The raw material powders are dissolved in an appropriate amount of deionized water and stirred until they are completely dissolved, and then heated at a constant temperature of 200°C. After the solution is evaporated to dryness, a vigorous redox reaction occurs in several tens of seconds, and a large amount of gas is released to form violet tungsten oxide. The obtained violet tungsten oxide powder was in the form of a nanoneedle with a particle size of 20-75nm and a length of 0.5-5μm.
