High-purity ultrafine blue tungsten oxide has properties of large specific surface area, uniform grain size and single phase composition, and can be used as raw materials for producing tungsten wire and many other tungsten products requiring high purity.
Inner Reducing Method to Produce Blue Tungsten Oxide
Blue tungsten oxide with high purity and large specific surface area will be obtained by reducing W (VI) with the inner composition of tungsten compound. This method usually uses ammonium paratungstate (APT) as raw material to synthesize intramo leculsrly reducing tungstate (IRT), and decomposes it in inert atmosphere.
Notice and Precautions of Inner Reducing Method to Produce Blue Tungsten Oxide
1. Select proper inert gas. IRT thermal decomposition should be processed in inert atmosphere to prevent generation of tungsten trioxide, such as nitrogen gas (N2) atmosphere. N2 is an economic gas that won’t affect product quality.
2. Determine thermal decomposition temperature. The thermal decomposition temperature has an effect on product’s quality.
3. Control thermal decomposition time. For a thermal decomposition temperature, the thermal decomposition time will also affect product’s quality.
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