Nano WO3 may be applied for manufacturing thermal insulation film. Although the obtained film has high transparency, it has excellent heat insulating property and ultraviolet shielding property. And such transparent heat insulating film of tungsten trioxide nano particles is environmentally friendly and non-polluting. This is due to the good optical properties of the raw material tungsten trioxide nanoparticles, that is, the high transmittance in the visible light region and the high shielding rate in the infrared light region and the ultraviolet light region.
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Therefore, in the energy-saving environment, the preparation method of nano tungsten oxide raw material has been a popular technology in the powder industry. So, what method can be used to prepare tungsten oxide nanoparticles? - Microemulsion method. Compared with other chemical methods, the WO3 nano particles prepared by the microemulsion method are not easy to aggregate, the particle size is controllable, and the dispersibility is good.
