At present, zirconium tungstate is the most widely studied negative thermal expansion material. AM₂O₈ series represented by ZrW₂O₈ has better negative thermal expansion performance and wider temperature range. In the existing academic papers, some scholars have introduced a process of preparing zirconium tungstate by multiple sintering solid-state method. Although this method can obtain single-phase zirconium tungstate products, it requires multiple sintering in the preparation process, and each sintering process parameters are changeable, the process is cumbersome and the conditions are not easy to control, and the requirements are too high.

Dicyclopentadiene dioxide is a kind of alicyclic epoxide with excellent properties. It has excellent weatherability, heat resistance, high hardness and good electrical insulation. It is used in high temperature casting materials, glass fibre reinforced plastics, adhesives, laminates and packaging of electronic devices. This material is usually prepared by epoxidation of dicyclopentadiene, and strong acid catalyst is needed in the reaction process.

Spray drying is a drying method that produces a powder drying product by processing a solution, emulsion, suspension and slurry material in a single process. The main advantages of this method are fast drying rate, short drying time and low material temperature. Its characteristics are that liquid raw materials can directly form powdered products, can be continuously produced in large quantities, without crushing process can directly get products with uniform particle size, excellent solubility and dispersion.

W60 tungsten copper bar is composed of 60% W and 40% Cu, which not only has high density (12.75g/cm3), high hardness (≥HB140), high strength, but also has good conductivity (%47IACS), softening temperature is ≥900℃.