At present, carbon fiber-based thermal insulation material is widely used in vacuum heat treatment furnace, cemented carbide sintering furnace, single crystal silicon drawing furnace and polycrystalline silicon ingot furnace. It has the advantages of small thermal conductivity, low thermal capacity, low density, small linear expansion coefficient, high temperature resistance, strong thermal shock resistance and strong chemical corrosion resistance.

Tungsten filament has excellent heat resistance and mechanical strength, so as cathode filament of TV electronic gun and filament material of various electrode materials, automobile lamp, lighting lamp of household appliances and photocopier lamp, it is widely used in many forms.

With the progress of science and technology and the development of society, nano-materials have gradually penetrated into various fields. One-dimensional nanomaterials, due to their unique structure and properties, have wide application prospects in optoelectronic devices, catalysis, energy storage and sensors.

Tungsten resources are abundant and various in China. At present, wolframite is decomposed by alkali and scheelite is decomposed by hydrochloric acid or boiled by soda. For quite a long time, experts at home and abroad generally believed that it was impossible to decompose scheelite by alkali (NaOH) in industry. Until Professor Li Honggui of Central South University put forward the hot-ball milling alkali decomposition process, which broke the convention.