Nanometer blue tungsten oxide may be applied for producing infrared ultraviolet shielding material such as thermal insulation film. And the obtained heat insulation materials have been gradually applied to architectural glass and automotive glass for heat insulation. Also, it can be applied in aircraft, yacht and cruise ship.
Blue tungsten oxide can be obtained by a self-reduction process of ammonium paratungstate. The principle of preparing blue tungsten oxide by self-reduction of ammonium paratungstate: Using the existing rotary electric furnace equipment (with a diameter of 400mm, maximum heating temperature of 850°C), by optimizing the process technology and process parameters, using the NH3 contained in the raw material itself but not adopt NH3, by pyrolysis of NH3 under a certain temperature condition to obtain H2, the pyrolysis product is prepared by micro-reduction of ammonium paratungstate (prepared by ion exchange method with a particle size of 35-44μm, first-class product) to meet the requirements of blue tungsten oxide.
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