With the rapid development of microelectronics industry, energy, aviation, machinery industry and other fields, the demand for ultra-fine tungsten powder is expanding. The quality of ultra-fine tungsten powder directly affects the final performance of material products in various industries, so how to lower the cost, It is of great significance to efficiently produce high-quality ultra-fine tungsten powder for production and application research.

Tungsten disulfide and molybdenum disulfide are typical sandwich layered structures. Because of their relatively weak van der Waals force between layers, tungsten disulfide can also be peeled into single or few layers of nanosheets. It is considered to be another important two-dimensional nanosheet material with unique physical, chemical and electrical properties. However, it is difficult to prepare pure tungsten sulfide nanomaterials with single layer structure in general chemical and physical methods.

Ammonium trithiothiotungstate [(NH₄)₂WOS₃] is an important thiometallic ammonium salt. After thermal decomposition, transition metal chalcogenide tungsten disulfide WS₂ can be obtained. At the activity center of biological nitrogenase, the synthesis of tungsten iron sulfur cluster compounds, semiconductors, superconductors, photochemical solar cells, storage batteries, lubricants and electrochemical reactions. Chemical sensors, nanomaterials, supercapacitors, new generation transistors, hydrogen storage materials and electrode materials have good applications.

Spherical powders have special properties which can not be replaced by ordinary powders, such as good fluidity and high bulk density. Therefore, spherical powders are widely used in thermal spraying, injection molding and gel casting. Because of its high temperature, high enthalpy, high chemical reactivity, controllable reaction atmosphere and temperature, plasma has shown unique advantages in the synthesis and spheroidization of powders and attracted people's attention.