Preparation of Lanthanum Tungsten Electrode
- Details
- Category: Tungsten Information
- Published on Thursday, 06 August 2015 15:54
Preparation of Lanthanum tungsten electrode is mainly adopting Tungsten Inert Gas (TIG) and plasma technology (PLASMA), for welding, cutting, spraying and smelting metals, such as, aluminum, copper, stainless steel.
Method One
1. Preparation of Lanthanum tungsten coating powder; pour water in a vessel that containing lanthanum acetate (La (Ac) 3 • nH2O) and Ammonium paratungstate (APT), tungsten trioxide (WO3) and tungsten powder to obtain mixing, and mixing evenly to obtain lanthanum tungsten coating powder.
2. The decomposition lanthanum salt in lanthanum tungsten coating powder; restoring it in a hydrogen atmosphere.
Restoring
Reduction temperature: 600 ~ 700 ℃; the time is controlled in 2~3 hours.
Secondary reduction
Reduction temperature: 800-970 ℃; gas flow rate is 0.5-2.0m3/h.
Method Two
Adding La2O3 to WO3 powder and then preparing the lanthanum tungsten electrode with excellent electrical properties and without radioactive contamination by reduction, sintering, swaging, drawing, cutting, polishing and other processes.
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