Ammonium metatungstate producing method (AMT) can be divided into two categories of solid and liquid phase transformation, the specific methods are thermal degradation, liquid - liquid extraction, ion exchange, electrodialysis, neutralization, acid hydrolysis alcohol precipitation method ect..

Tungsten copper thermochemical method is also known as powder coating method, which doped with compound or compound solution and dried calcined to obtain the coated powder after reduction.

White tungstic acid and yellow tungstic acid difference mainly embodies in their appearance, white tungstic is white powder with white microcrystalline structure, yellow tungstic acid is the most common seen tungstic acid, color is light yellow and is in powder form.

Discoveries in tungsten use can be loosely linked to four fields: chemicals, steel and super alloys, filaments, and carbides.