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Molybdenum Electrode

Molybdenum electrodes are primarily composed of molybdenum, which is produced through powder metallurgy processes. With a molybdenum content of over 99.95% and a density exceeding 10.15 g/cm3, molybdenum electrodes guarantee the quality of glass and the durability of the electrode.


Molybdenum electrodes find applications in the manufacturing of domestic glass, optical glass, thermal insulation materials, glass fiber, and rare-earth industries.

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Operating Principle of Molybdenum Electrode

The operating principle of a molybdenum electrode is based on its unique physical and chemical properties. Molybdenum is a refractory metal that has a high melting point, high thermal conductivity, and excellent mechanical strength.


During glass melting processes, a molybdenum electrode is heated to a high temperature, at which it becomes electrically conductive. The molybdenum electrode is then immersed in the molten glass, and an electric current is passed through it, generating heat and promoting the melting process.


The high melting point of molybdenum ensures that the electrode remains intact and does not melt during the process. The excellent thermal conductivity of molybdenum ensures that heat generated during the process is efficiently transferred through the electrode, ensuring uniform heating of the glass.


The mechanical strength of molybdenum ensures that the electrode has a long service life, can withstand mechanical stress, and can be reshaped or repaired if necessary. Furthermore, the high purity of molybdenum ensures that the electrode does not contaminate the glass during the melting process.


In summary, the operating principle of a molybdenum electrode is based on its ability to conduct electricity, withstand high temperatures and mechanical stresses, and efficiently transfer heat, ensuring optimal quality in the glass manufacturing process.

Properties and Characteristics of Molybdenum Electrodes

Molybdenum electrodes are highly valued for their unique physical and chemical properties. Molybdenum is considered a refractory metal due to its high melting point, excellent thermal and electrical conductivity, and outstanding strength and durability. The following are some of the properties and characteristics of molybdenum electrodes:


  • High melting point: Molybdenum has a high melting point of 2,620°C, making it resistant to melting even when subjected to high temperatures. 

  • High thermal conductivity: Molybdenum has a thermal conductivity of 138 W/mK, enabling efficient and uniform heating in glass melting processes. 

  • Low thermal expansion: Molybdenum has a low coefficient of thermal expansion, which minimizes the risk of cracking under thermal stress. 

  • Corrosion and erosion resistance: Molybdenum is highly resistant to chemical and electrochemical corrosion and erosion even in harsh environments. 

  • High-purity: The high purity of molybdenum ensures that it does not contaminate the molten glass during the melting process, ensuring product quality.


Overall, the properties and characteristics of molybdenum electrodes provide superior performance and longevity in glass melting processes and other applications, making them a popular choice in various industries.

Maintenance and Repair of Molybdenum Electrodes

Molybdenum electrodes are commonly used in resistance welding due to their high melting point and excellent conductivity. To ensure their longevity and efficient performance, proper maintenance and repair are necessary.


Maintenance of molybdenum electrodes involves keeping them clean and free of contaminants. Dust, oil, and other residues can degrade their performance and cause damage. To clean electrodes, use a soft cloth and a mild solvent such as isopropyl alcohol.


Repair of damaged molybdenum electrodes involves identifying the extent and location of the damage. Minor damage can sometimes be sanded down, while larger damage may require repair welding or replacement. Repair welding involves using a TIG or laser welder to deposit a layer of molybdenum onto the damaged area. Any welding should be performed by a skilled welder to ensure a quality repair.


When not in use, molybdenum electrodes should be stored in a dry and clean location. Exposure to moisture or other contaminants can cause corrosion, which can degrade their performance and lead to failure during use. Proper maintenance and repair of molybdenum electrodes can prolong their lifespan, ensuring efficient and reliable welding operations.