Nano Ammonium Metatungstate Applied for Heat Insulating Window Glass

Nano ammonium metatungstate can be used as a raw material for preparing nano tungsten oxide aqueous solution in a new process. The obtained aqueous solution can be used to produce heat insulating film for applying to automobile glass to obtain heat insulating window glass, which has high heat insulation, high visible light transmittance and high ultraviolet light shielding effect. So, what is the specific process of nano tungsten oxide aqueous solution by new production method?

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A new method for preparing nano tungsten oxide aqueous solution: taking 10ml of deionized water in a beaker, weighing 20g of ammonium metatungstate into the deionized water, adding 5g of sodium borohydride, mixing and shaking. The reaction was allowed to stand at room temperature (20°C) for 20 minutes. After centrifugation, the supernatant was poured off. And the deionized water was poured to obtain tungsten oxide nano aqueous solution with a particle size of 1-20nm.

The preparation of the nano tungsten oxide aqueous solution by such new method can overcome the following problems in the conventional manufacturing method:

1.0 The appropriate dispersant must be selected to disperse the nano tungsten oxide to prevent its agglomeration.

2.0 The nano tungsten oxide concentration of the tungsten oxide aqueous solution is limited with more impurities.

3.0 The preparation process is complicated and the preparation time is long.

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