Nano tungsten trioxide powder is an important industrial raw material, which can be used to prepare nano-tungsten powder and nano-tungsten carbide powder. In addition, nano WO₃ has a strong ability to absorb electromagnetic waves. It can be used as a good absorbent material in the utilization of solar energy and an important invisible material in the military.

As a phase change compound, vanadium dioxide (VO2) undergoes a transition from a high temperature tetragonal phase to a low temperature monoclinic phase at around 68 ° C. 

Tungsten tailings are solid waste discharged from tungsten-bearing minerals in tungsten ores. China's tungsten resources have very low taste and few rich ores, and only 20% of the tungsten grade (WO₃) is greater than 0.5%. As a result, a large number of tungsten tailings are produced in the process of beneficiation.

Nitrogen oxides (NOx) are important atmospheric pollutants that can cause environmental problems such as acid rain and photochemical smog, as well as direct damage to the human respiratory system. In addition, it also has an important contribution to the increasingly serious ash pollution in our country. Therefore, effective control of NOx emissions is a major strategic need in China.