Tungsten trioxide powder is only a raw material or an intermediate product for producing smart heat insulation window glass. And tungsten trioxide is present on thermal insulating glass in the form of tungsten trioxide film. With the increasing awareness of environmental protection and the growing demand for thermal insulation film, WO3 and WO3 heat insulation film has gradually entered people's field of vision. But do you know how to prepare WO3 heat-insulation film? Some experts have prepared WO3 film by wet process of ammonium metatungstate.
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Ammonium metatungstate (AMT) is a commonly used, relatively inexpensive industrial material that is readily soluble in water and solvents such as N, N-dimethylformamide (DMF). AMT is decomposed at about 300 °C to produce WO3. Specifically, the expert adopts the following preparation method to obtain tungsten trioxide thin film: 200 mg of ammonium metatungstate hydrate is dissolved in DMF sufficiently, and anhydrous ethanol is added. The ITO glass substrate (3 cm x 3 cm) is washed and dried. The precursor solution was spin-coated on an ITO substrate to form a film, and heat-treated to obtain a WO3 film.
