With the development of nanotechnology and the popularization in the field of living room heat insulating glass coating, nano tungsten trioxide is more and more well-known. Therefore, it has attracted much attention to find a method for realizing the industrialized batch production of tungsten trioxide nano powder.
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The following describes a method for preparing nano tungsten trioxide. The reaction process of this method is smooth and stable, and easy to control. Moreover, the prepared tungsten trioxide nano particles are fine and uniform with high purity. In a word, this method is convenient to realize industrialized mass production of nano particle size tungsten trioxide. Specifically, the tungsten trioxide nano powder can be prepared by the following steps: The saturated ammonium tungstate solution is heated to 65-70 °C, and then ammonium chloride, tartaric acid, ethylenediamine tetrapropionic acid, and diethanolamine are added in order. Wherein, during the adding process, keep stirring until completely dissolved and continue stirring for 1-2h. While stirring, add nitric acid to form a tungstic acid gel. Then, the gel was dried in a heating furnace at 140-150 °C, and then heated to 340-380 °C for calcination. Finally, the tungsten trioxide powder with an average particle size of 23-28 nm is obtained by ball milling.
