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The Quality of the Finished Optical Glass is Related to the Molybdenum Electrode

Views: 2     Author: Site Editor     Publish Time: 2020-12-16      Origin: Site

The Quality of the Finished Optical Glass is Related to the Molybdenum Electrode

Among all refractory metals, molybdenum is the most commonly used metal. When made into an alloy, it has extremely high resistance to high temperatures and creep, making it extremely resistant to corrosion.

Molybdenum has a wide range of uses, including electric furnace heating elements, sprayed metal, solid rocket motor skirts, heat shields, zinc refining pumps, switching electrodes and tools for metal processing. In addition, molybdenum is also highly recommended as a high-performance electrode for melting glass in glass melting furnaces.

Glass manufacturing is the main consumer industry for metal molybdenum electrodes. Experience has proved that molybdenum is a superior material for molten glass. From tempered glass, glass fiber, optical glass to insulating materials, glass melting molybdenum electrodes must be able to withstand very aggressive glass corrosion at extremely high temperatures.

As long as the working temperature and chemical requirements exceed the limits of conventional materials such as iron, copper or nickel, the performance of molybdenum electrodes will be prominent, such as low thermal expansion coefficient; good electrical and thermal conductivity; high dimensional stability; high melting point of 2620°C; purity High, will not affect the color or transparency of the finished glass; oxidation and creep resistance; resistance to corrosion of molten glass, etc.

As environmental protection requirements are getting higher and higher, and the quality requirements of glass products are getting higher and higher, the use of electric fusion in glass factories has become a general trend. At present, many domestic all-electric melting glass furnaces and flame-electrically assisted melting glass furnaces use electrodes made of pure molybdenum materials. Molybdenum electrode is a common electrode for melting soda-lime glass and high borosilicate glass. It has a higher use temperature and surface current intensity, even up to 2000 ℃.

The quality of the molybdenum electrode is critical to the quality of the finished glass. The surface of the electrode is smooth and compact, with a gray metallic luster, with a density greater than 10. 15g/cm3, and a Mo content greater than 99.995%. The corrosion product of the electrode material is not allowed to bring any defects to the finished glass, such as coloring, stones and streaks. In addition, during the contact between the electrode material and the molten glass, no bubbles are allowed, because bubbles are considered defects in the finished product. Once gas and other substances are generated, bubbles may be generated, so the electrode material used is not allowed to cause bubbles.

As a professional manufacturer of tungsten and molybdenum with more than 20 years of production experience, we are committed to improving the performance of molybdenum electrodes so that they have excellent characteristics of high strength. Using the purest molybdenum powder, produced by powder metallurgy process, not only has high purity, but also has a particularly smooth surface, so as to ensure that our glass melting molybdenum electrode is not polluted.

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