Molybdenum metal is employed in a variety of industries like electronics, semiconductors, glass-making, and most importantly heating applications. For instance, there is a range of vacuum furnace hot zones made from molybdenum metal.
Figure 1. Molybdenum Sheets
Therefore, this article is going to explore how molybdenum metal is applied to manufacture heating apparatus using a specific case. Hope that you can have a better understanding of the types and benefits of molybdenum metal used in vacuum furnace hot zone.
A vacuum furnace is a type of heating equipment with lots of components used in a vacuum surrounding. Generally, it is composed of vacuum vessels, hot zones, pumping systems, cooling systems, and temperature & vacuum control systems. Among them, the hot zone is the heart of a vacuum furnace because it largely affects the process quality, the temperature, the pressure, and the operating cost.
Figure 2. A Vacuum Furnace
A reliable vacuum furnace comes with the following advantages.
With these desired properties, vacuum furnaces are used to carry out heating processes such as annealing, sintering, brazing, hardening, and tempering.
Molybdenum is used to manufacture vacuum furnace apparatus for the good points below.
You could find molybdenum metal in the major components of a vacuum furnace hot zone: the heating elements where other parts are based; the insulation or heat shields; and the hearth that supports other devices.
Molybdenum is a popular heating element material used in the vacuum furnace hot zone due to its high operating temperature. Apart from it, using molybdenum decreases impurities introduced in the process, while graphite might cause contamination. Molybdenum heating elements are extensively used in the medical, electronics, and aerospace industries which require clean environments for sensitive materials.
Figure 3 Molybdenum Heating Elements
Multiple layers of molybdenum heat shield sheets are commonly used in a vacuum furnace hot zone to prevent heat conduction from the central area of the heat field. Namely, there are many layers of heat-shield sheets in the hot zone. They lay parallel to each other and have a large space between them. For higher operating temperatures, more molybdenum metal layers are needed, and the space in between changes as well.
Figure 4 Molybdenum Heat Shields
Molybdenum metal is used to manufacture heating elements, heat shields, and hearth support in the vacuum furnace hot zone because it has high strength and ideal thermal features. Advanced Refractory Metals (ARM) is a leading supplier of molybdenum products of different sizes and shapes. There are molybdenum sheets, plates, rods, bars, and alloys available. Check our site for the most suitable molybdenum products.
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