In recent years, in the application of automobile, energy and other fields, materials need to have the properties of corrosion resistance, high temperature resistance, heat conduction and so on. Special ceramics are needed to meet the development of its application. Zirconium tungstate material has negative expansion. It has strong isotropic negative thermal expansion effect in the temperature range of 0.3-1050K. Its negative thermal expansion coefficient (NTE) is -9*10-6K^-1, which is one of the hotspots in the research of negative expansion materials.

At present, wolframite is the main resource consumed in tungsten smelting in China, and the basic reserves of wolframite resources will be exhausted in a few years. In addition, most of the newly discovered tungsten resources are complex scheelite resources, which has shown the absolute predominance of scheelite. Therefore, the development of scheelite resources to replace wolframite is a strategic choice for the sustainable development of tungsten industry in China.

With the development of science and technology, the preparation and processing methods of materials have made great progress. Arc plasma technology is a process that has been rapidly popularized in recent years. It is widely used in industrial fields such as plasma welding, cutting, spraying, melting and other materials preparation and processing, as well as emission electric light sources, microwave power tubes, vacuum tubes, and ion bodies. Fields such as propellers.

Ultrafine grained tungsten-cobalt cemented carbide has high hardness and high strength, which is widely used in many fields such as woodworking tools, dental tools, metal processing and wear-resistant materials. The properties of ultrafine cemented carbides are closely related to grain size.