Tungsten trioxide powder may be used to manufacture heat insulation masterbatch. And the prepared heat-insulating masterbatch can be used for the preparation of heat-insulating glass and the like. So, the room temperature and temperature in automobile can be reduced. And it also reduces the cooling fee.
The WO3 powder may be prepared by template method with the advantages of simple production process, high repetition rate, good predictability, uniform product morphology and stable performance. However, the disadvantage is that the templating agent is relatively expensive.
Preparation of Tungsten Trioxide Powder by Template Method
Using silicic acid as hard template and phosphotungstic acid chloride as precursor, meso-porous silicon was dispersed in ethanol and H3PW12O40?nH2O was added, stirred well for 2h, and concentrated at room temperature. The WO3 powder was calcined at 350-900°C, the silicon template was removed in hydrofluoric acid, and the product was obtained by centrifugation. Finally, highly ordered tungsten trioxide particles were synthesized.
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