W50 tungsten copper rod is composed of 50% W and 50% Cu, which not only has high density (11.85g/cm3), high hardness (≥HB115), high strength, but also has good conductivity (%54IACS), softening temperature is ≥900℃.

When using traditional WC-17Co thermal spraying powder, its crack resistance is better than that of WC-12Co spraying powder because of its high cobalt content, but its hardness is relatively low. When the hardness of the coating is increased by adjusting, the toughness of the coating decreases obviously. How to achieve a balance between toughness and hardness? Therefore, some scholars have found a way to synthesize tungsten carbide coating materials.

The crystal structure of tungsten trioxide belongs to ReO₃ type and its band gap is about 2.8eV. Tungsten trioxide has unique physical and chemical properties. It has wide application prospects in gas sensing, electrochemistry, electrochromic, photocatalysis and other fields.

At present, the recycling of tungsten resources mainly focuses on tungsten-containing alloy waste and tungsten-containing catalyst waste. Ammonium paratungstate waste contains a lot of sediment, and its acid-base solubility is poor. The chemical recovery method is used to recover and utilize the environment, which is polluted greatly, the equipment is corroded seriously and the cost is high. Therefore, although there are many studies on ammonium paratungstate waste recycling, most of them are still in the laboratory pilot study stage. Recently, some scholars have published a method to recover tungsten and tin from waste. The process includes these steps: