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Glass Melting Electrodes

Glass Melting Electrodes

Date posted: May 11, 2015 // Glass Melting

Glass Melting Electrodes Feature Superior Corrosion Resistance 

Labotec Industrial Technologies offers superior quality Molybdenum glass melting electrodes from the PLANSEE product stable. The revolutionary electrodes are created through a range of powder metallurgical actions. The glass melting electrodes offer specific benefits:

  • Superior quality for reliable results and performance.
  • Variety of thread designs to suit application requirements.
  • Customised thread manufacturing available upon client request.
  • Outgas certificate available.
  • Oxidation resistant coatings for superior performance and longevity. 

What is Molybdenum? 

The metal has a melting point of over 2 600°C. The transitional metal is used in high pressure and temperature applications because of its high melting point. It boasts an electron-negativity of 2.16 (Pauling scale) and the metal does not visibly react with water or oxygen at the normal room temperature, but most of the oxidation occurs if the temperature goes above 400°C.

It is the most used refractory metal in the world and when made into an alloy it has exceptional high temperature resistance which helps to increase its corrosion resistance. The metal is used in various applications ranging from heat shields to switch electrodes and glass melting electrodes. 

Why Molybdenum in the Glass Melting Electrodes? 

The glass melting electrodes are exposed to extremely high temperatures and it is thus imperative that the electrodes be able to withstand the temperatures. With Molybdenum’s resistance to high temperatures it makes sense to use the metal as oxidation only starts to occur in temperatures of above 400°C However, to protect further against the possibility of oxidation the electrodes are anti-oxidation coated. With such the temperature must rise above 1 700°C before oxidation takes place and the coating thus provides the perfect dispersion barrier and an effective seal against the air. With such, the electrodes will not easily melt and the manufacturer can mount the electrodes before heating of the glass tank.

The molybdenum offers advantages such as increasing the melting point to 2 620°C, improving the resistance to corrosion and thus prolonging the lifespan of the electrodes while ensuring optimal thermal and electrical conductivity. In addition it improves creep resistance and ensures superior dimensional stability.

Only the purest molybdenum oxide is used to protect against impurities which can cause bubble formation or discoloration. The electrodes boast an extremely smooth surface because of the unique forging method applied in the making of the electrodes. The small quantities of zirconium oxide, which are added to the molybdenum, improve the corrosion and creep resistance of the metal.

Call us at Labotec Industrial Technologies for more information on the superior quality glass melting electrodes available from the PLANSEE brand