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Tungsten Electrode

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Item Name

Added Impurity (%)

Other Impurities (%)

Electric discharged power (eV)

Color code

pure Tungsten electrode

---

< 0.2%

4.5eV

Green

Thoriated Tungsten electrode

ThO2 (0.90% ~ 1.20%)

< 0.2%

2.0eV ~ 3.0eV

Yellow

ThO2 (1.80% ~ 2.20%)

< 0.2%

2.0eV ~ 3.0eV

Red

ThO2 (2.80% ~ 3.20%)

< 0.2%

2.0eV ~ 3.0eV

Violet

ThO2 (3.80% ~ 4.20%)

< 0.2%

2.0eV ~ 3.0eV

Orange

Ceriated Tungsten electrode

CeO2(1.80% ~ 2.20%)

< 0.2%

2.7eV ~ 2.8eV

Grey

Lanthanated tungsten electrode

La2O3 (0.80% ~ 1.20%)

< 0.2%

2.8eV ~ 3.2eV

Black

La2O3 (1.30% ~ 1.70%)

< 0.2%

2.8eV ~ 3.0eV

Golden

La2O3 (1.80% ~ 2.20%)

< 0.2%

2.6eV ~ 2.7eV

Azure

Yttriated Tungsten electrode

Y2O3 (1.80% ~ 2.20%)

< 0.2%

2.0eV ~ 3.9eV

Blue

Zirconiated Tungsten electrode

ZrO2 (0.20 ~ 0.40%)

< 0.2%

2.6eV ~ 2.7eV

Brown

ZrO2 (0.70% ~ 0.90%)

< 0.2%

2.6eV ~ 2.7eV

White

composite electrode

CeO2, ThO2, La2O3, ZrO2, Y2O3 (1.50% ~ 3.00%)

< 0.2%

 

Grass green