Calcium tungstate is a very important chemical raw material, which is mainly used to produce ammonium paratungstate, tungsten trioxide, ferrotungsten, alloy steel, hard alloy, tungsten material, tungsten wire and tungsten alloy. It can be concluded that calcium tungstate is a kind of substance with wide application, and the preparation of tungstate from calcium tungstate is also a very interesting process.

Tungsten disulfide lubricating material is a very excellent new material for wear reduction and energy saving. Its friction coefficient is only 0.03, and its performance is much better than the traditional graphite and molybdenum disulfide. It is known as the new "king of lubrication". It can not only be used in general lubrication conditions, but also in certain high temperature, low temperature, high load, high vacuum, radiation line and corrosive medium and other harsh working environment. It can be in powder state, or mixed with lubricating oil, grease, graphite, gold powder, plastic and other materials to make composite materials.

Doped tungstate is the use of chemical or physical means to embed particles on the main lattice of catalyst, introduce new electronic center and new charge into the lattice, form lattice defects and change the type of lattice, adjust or change the energy band structure of catalyst to affect the movement of photogenerated electrons and holes, and ultimately lead to the change of photocatalytic activity of catalyst.

The narrow band gap (about 2.7eV) of WO₃ makes it have better absorption in visible light area, which is obviously superior to the traditional TiO₂ photocatalyst, but it also has the disadvantages of high carrier recombination rate and low visible light photocatalytic activity. The separation efficiency of photogenerated electron hole pair of WO₃ can be improved by the control of graphene recombination, crystal structure and morphology, and then the photocatalytic activity can be improved.

In order to develop the substitute of lithium battery and get rid of the dependence of cobalt and nickel metal as much as possible, foreign researchers have developed a very promising defective tungsten oxide lithium battery. To some extent, lithium battery can reduce the consumption of expensive metal materials.

With the further development of China's reform and opening up, buildings are getting higher and higher. In these high-rise buildings, most of the windows are floor to floor windows to increase the indoor lighting. However, because these glasses generally do not have the function of adjusting the light, if the residents want to adjust the light, they usually install a group of curtains on the windows, and adjust the opening and closing of the windows to adjust the light. However, by installing curtains to adjust the light, not only the process increases and increases the cost, but also the users need to manually adjust the opening and closing of windows, which is not convenient.

Nano violet tungsten oxide has optical properties and strong absorption ability in near infrared region. Therefore, it can be used as a photothermal conversion material and used in cancer treatment. Nano violet tungsten oxide has a very high application value in the preparation of near infrared photothermal medicine.

Under an atmosphere of H₂ or Ar, WS₂ nanotube with small diameter and few layers can be successfully synthesized by heating W₁₈O₄₉ nanowire and sulfur powders at 840°C. During the preparation process, W₁₈O₄₉ nanowire is first prepared from WCl₆ and ethanol.

W₁₈O₄₉ is a kind of supercapacitor electrode material with good electrochemical performance and huge market potential. Using W₁₈O₄₉ as electrode material can effectively improve the performance of the supercapacitor and give the device a new intelligence feature.