Cemented carbide is known as industrial teeth. Its main component is tungsten carbide (WC). Because cobalt powder has good wettability to tungsten, cobalt is generally used as bonding phase. The conventional proportion is 2-10%. Over the past year, the price of cobalt has been rising, which has seriously affected the production cost of cemented carbides. Experts and scholars around the world are studying new resources of new cemented carbide materials. Tesla is trying to replace cobalt with iron and nickel as new materials for batteries. In the cemented carbide industry, some enterprises use iron and nickel instead of cobalt.

In order to improve the properties of tungsten and tungsten alloys, yttrium doping is a very effective method. It can improve the properties of tungsten and tungsten alloys by changing the reaction sequence, affecting the skeleton and growth, and forming second phase reinforcement phase. Therefore, researchers have developed a method for preparing ultrafine tungsten (W) powder by doping rare earth yttrium (Y) with ammonium paratungstate (APT).

Tungsten trioxide is regarded as one of the most promising photocatalysts because of its visible light response. However, one of the difficult problems it faces is its poor catalytic activity. Although noble metal platinum (Pt) supported tungsten trioxide exhibits high catalytic performance, the price of platinum is unbearable, so it is imperative to study cheaper synthetic materials.

The preparation of nano organic composite tungsten oxide electrochromic films can make use of nano-structured tungsten oxide films to make organic electrochromic materials better compounded with nano-tungsten oxide electrochromic materials, thereby improving the electrochromic properties of tungsten oxide electrochromic films. The preparation process is as follows:

Silver-tungsten electrical contacts are widely used in various household appliances due to their good thermal conductivity, electrical wear resistance, welding resistance and oxidation resistance.

Tungsten trioxide (WO₃) is an n-type semiconductor oxide with wide band gap. Ordered nanostructured WO₃or hydrated WO₃ has the characteristics of quantum effect and surface effect unique to nanomaterials. It has wide application prospects in gas sensing, photocatalysis, energy storage devices and other fields.

Compared with titanium dioxide, tungsten trioxide (WO₃) nano-powder can efficiently photocatalytically degrade methylene blue due to its narrow band gap, which can only absorb ultraviolet light. However, the technical problem of photocatalytic degradation of methylene blue by tungsten trioxide is to select catalysts with high catalytic activity.

Tungsten oxide is a typical transition metal oxide with a band gap of 2.4-2.8eV. It belongs to a typical n-type semiconductor. Tungsten-based oxides not only act as catalysts, electrochromic, battery electrodes, solar energy absorbing materials and invisible materials, but also have the properties of pressure sensitive, thermal sensitive and gas sensitive semiconductor functional materials.

Tungsten trioxide is not only a kind of n-type semiconductor material, but also a kind of "d0" oxide. This dual identity makes tungsten trioxide have catalytic, optical and electrical properties at the same time, making it a basic material for industrial manufacturing such as smart windows, electronic packaging, secondary lithium batteries, gas sensors and so on.

Gas-sensitive materials refer to a class of gas-sensitive materials. Usually, the resistance of these materials varies with the surrounding gas environment. Using the so-called selectivity and sensitivity, it can not only distinguish different kinds of gases, but also identify the concentration of specific gases. At present, the sensitive components made of gas-sensitive materials have entered the practical stage in the petroleum, chemical industry, coal mine, automobile manufacturing, electronics, power generation and other industrial departments, as well as environmental monitoring, residential harmful gas alarm, national defense and other departments.