The welding method of copper bonded tungsten copper electrode is silver brazing, which is the most popular method in our workshop. The silver welding material is used, so that the electricity conductivity can be maintained.

In recent years, nanometered-scale tungsten and its compounds have attracted much focus because of their superior physical and mechanical properties. A wide variety of methods such as mechanical alloying, combustion synthesis, physical vapor deposition (WD), electric wire explosion etc. have been used to synthesize nanostructured tungsten. Among these techniques, mechanical alloying and mechanochemical synthesis (CS) are very attractive. Simple and inexpensive equipments are required, and it can be conducted at ambient temperature. Indeed MCS uses mechanical energy to active chemical reactions.

Recently, two-dimensional (2D) nanomaterials has attract a great attention due to its unknown physical, chemical, electrical and optical properties. For instance, graphene nanosheets mechanically exfoliated from graphite show very high carrier mobility, excellent thermal conductivity and optical properties, which inspires lots of other 2D materials such as graphene oxide (GO) , hexagonal boron nitride (h-BN), transition metal carbides and carbonitrides (MXenes), as well as graphitic carbon nitride (g-C3N4) 161 are well studied.

The increasing use of fossil fuels is the major cause of global warming and climate change. Looking for a sustainable, clean, and highly efficient energy has become research hot spot.

Metastable intermolecular composite (MIC) materials is an intimate mixture of two or more compounds of which at least two are exothermically reactive. However, conventional thermites have a significantly lower reactive power. In contrast, MIC materials, while retaining the high energy density, can have a significantly higher reactive power than conventional thermites.

The most accepted recycling of tungsten scraps are hydrometallurgy or hydrothermal treatment methods. The common recycling process of tungsten scraps to produce ammonium paratungstate (APT) is carried out by the oxidation, milling, fusion, dissolution and extraction processes. Among which, oxidation is the key factor to the recovery rate of tungsten scraps. 

Spherical tungsten powder is used as a raw material in industries such as tungsten and tungsten alloy 3D printing, porous materials, and high-density powder spraying, and its preparation methods have attracted attention. So, what are the 6 preparation methods for spherical tungsten powder?

Tungsten carbide-based cemented carbide is widely used in cemented carbide, and high-quality tungsten carbide powder is the basis for preparing high-performance cemented carbide. What is the preparation method of high crystallinity tungsten carbide powder?

Compared with the negative electrode made of tungsten disulfide alone, the tungsten disulfide carbon nanotube negative electrode material has better rate performance and cycle stability, and is more suitable for participating in the production of sodium ion batteries. What is the preparation method of tungsten disulfide carbon nanotube anode material?

In order to overcome the shortcomings of the existing technology, chemical researchers designed a method for preparing nano-tungsten disulfide with a fullerene structure.