Hydrothermal method produces tungsten trioxide using sodium dehydrate as raw material, by ultrasonic treatment and move to reaction still to produce tungsten trioxide.

There are some influencing factors of thorium tungsten wire drawing.

1. The Blank State, including wire strength, cross-sectional size, cross-sectional shape, surface condition and consistency.

Common seen tungstic acid producing method is tungsten concentrate soda sintering method, tungsten concentrate soda solution pressure digestion and sodium hydroxide solution decomposition method.

Tungsten electrode is pided into different types in accordance with the materials of tungsten, including pure tungsten electrode, lanthanated tungsten electrode, cerium tungsten electrode, thoriated tungsten electrode, yttrium tungsten electrode, zirconiated tungsten electrode, silver tungsten electrode and composite tungsten electrode.