Calcination history of APT in air: T≥240°C, transforming into ammonium metatungstate (AMT),
300~350℃, ammonium tungsten bronze ATB,
400°C, hexagonal WO3,
500℃, triclinic tungsten trioxide.
APT purity, crystal form is hereditary,
The calcination temperature and speed have a significant impact on the physical and chemical properties of the product.
The higher the calcination temperature, the coarser the particle size of WO3 obtained
The temperature rises sharply, and the specific surface area is larger. Heating slowly, the crystal form is complete and the specific surface area is small.
More details of tungsten oxide product, please visit website: tungsten-oxide.com
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Email: sales@chinatungsten.com
Tel.: 86 592 5129595
