Tungsten oxide production is calcinating ammonium paratungstate under 500 degree celsius in the air into tungsten trioxide, or hydrogen reduction under 450 degree celsius into blue tungsten oxide. The traditional method producing tungsten oxide is easy to operate and of low cost./p>
Producing process of special morphology tungsten oxide:
Tungsten oxide has a strong organizational ability to grow in a stable reaction conditions, the interaction between molecules is very obvious. Molecular lattice arrangement can be in strict accordance with the epitaxial growth, the formation ratio of complete single component structure. With the improvement of nano technology, there have been some special form of tungsten oxide, including tree, plates, nanorods, nanowires and other special forms.
The method of preparation of special nano structure tungsten oxide can be divided into three types: high-temperature synthesis, hydrothermal synthesis method, and solution temperature synthesis method. High temperature synthesis method has high requirement for equipment, so it can not be widely applied. The hydrothermal synthesis method is the acidification of W(CO)6 and ammonium tungstate, reacting for 2-100 hours under 160-200 degree celsiusto producing different shapes of nanorods. Compared to high temperature synthesis method, it is of low cost and easy to be operated. Solution temperature synthesis method is a new method which is still under researching.