Barium strontium tungstate cathode as tungstate cathode first appeared in the form of compacted cathode in the 1960s. The cathode is made of barium strontium tungstate (Ba₅Sr (WO₆)₂) as an active material for emission. The synthesized barium strontium tungstate and activator, as well as tungsten powder with a certain size, are pressed and sintered in hydrogen at high temperature.

Unbonded tungsten carbide cemented carbide has better high temperature resistance, wear resistance, corrosion resistance, oxidation resistance and higher hardness than traditional cemented carbide. It is becoming an important development direction of high wear resistant cemented carbide.

Additional material manufacturing is a new processing technology, which is different from the traditional "removal" manufacturing. It does not need the original embryo and die. According to the computer three-dimensional model data of parts directly, it can form any complex shape object by adding material layer by layer. Nowadays, people have given the added material manufacturing a fashionable name - 3D printing.

Tungsten oxide (WO₃) is an indirect bandgap n-type semiconductor material with a band gap of 2.2-2.8eV. It has good absorption of visible light, so it is a very promising semiconductor photocatalyst. In common practice, metal ions are doped into semiconductor photocatalysts, and the recombination of electron-hole pairs can be significantly inhibited by IFCT effect, which can greatly improve the photocatalytic activity of photocatalysts.

At present, the raw materials of organic chemicals and energy industry mainly come from fossil resources such as coal, oil and natural gas. The depletion of fossil resources and the deterioration of ecological environment force people to seek new ways to synthesize chemicals and fuels from renewable resources.

Chromochromism refers to the phenomenon that the optical properties (reflectivity, transmittance, absorptivity, etc.) of materials change reversibly under the action of external electric field or voltage. Electrochromic materials have wide application prospects in smart windows, anti-glare mirrors, optical information storage and other fields.

Zirconium tungstate (ZrW₂O₈) is a commonly used negative expansion material, which has high coefficient of negative expansion and wide temperature range. Zirconium tungstate can be prepared separately or added to metal matrix, such as copper or aluminium alloy, to reduce the expansion coefficient of the material. However, in the modern process, excessive preparation temperature and holding time will lead to the decomposition of zirconium tungstate or the reaction between zirconium tungstate and metal, so how to control the interface reaction is also a problem that zirconium tungstate metal matrix composites need to face.

Nitrogen oxides (NO_x) are recognized as one of the major sources of atmospheric pollution, including combustion fumes and automobile exhaust. Monolithic vanadium-titanium based catalysts have been widely used in the removal of NO_x from flue gas or tail gas. The NO_x can be removed by selective catalysis of NH₃ to N₂. The catalyst is supported by titanium dioxide (usually 80-90% of the total mass), V₂O₅ (1-2%) and WO₃ (5-10%). Initial investment of catalysts in denitrification projects usually accounts for 30-50% of total investment.

Bi₂WO₆ has a narrow visible light response range, easy recombination of photogenerated electrons and holes, short lifetime, low visible light utilization and photocatalytic activity. In view of the defects of Bi₂WO₆ photocatalytic materials, modification of Bi₂WO₆ photocatalytic materials and development of new materials with high photocatalytic activity and stable photocatalytic performance are the key to practical application.

Global environmental pollution restricts the progress of human civilization, and the elimination of environmental organic pollutants requires a lot of energy, which poses a serious challenge to the increasingly depleted energy. Research shows that almost all organic pollutants can be effectively degraded, decolored and detoxified by semiconductor photocatalysis. Mineralization into inorganic small molecular substances, thereby eliminating environmental pollution and hazards.