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Molybdenum Guide Shell

The molybdenum guide shell, also known as the molybdenum shield, has a trumpet-like shape with a larger upper opening and smaller lower opening. Different manufacturers of monocrystal furnaces offer a variety of styles for the upper opening.


When applied, the molybdenum guide shell is inserted into the conventional graphite guide shell, which enhances the crystal pulling rate. The practice of many clients has demonstrated that using the molybdenum guide shell can shorten the crystal pulling duration by 2-4 hours compared to previous methods.

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Operating Principle of Molybdenum Guide Shell

The molybdenum guide shell, referred to as the molybdenum shield, has a trumpet-like shape featuring a larger opening at the upper end and a smaller opening at the lower end. The upper opening takes different forms because of the variation in manufacturers of monocrystal furnace.


When used, the molybdenum guide shell is inserted into the conventional graphite guide shell, leading to an enhancement in the rate of crystal pulling. Many clients attest that using the molybdenum guide shell reduces the duration of crystal pulling by 2-4 hours compared to previous methods.


Purity

MO ≥ 99.95%

Density

≥ 10.1/cm3

Supply specifications

16 inches, 18 inches, 22 inches, etc.


Applications of Molybdenum Guide Shells in the Monocrystal Furnace Industry

Molybdenum guide shells are widely used in the monocrystal furnace industry due to their unique thermal and mechanical properties. As a refractory metal with a high melting point, molybdenum can withstand the high-temperature and harsh conditions within the furnace.


One of the primary applications of molybdenum guide shells is in the production of single-crystal silicon, which is used in the semiconductor industry. Molybdenum guide shells are used to guide and control the growth of crystals, forming a cylindrical ingot of single-crystal silicon. The high purity and low impurity content of the molybdenum guide shell prevent contamination of the single-crystal silicon.


Other applications of molybdenum guide shells include the production of sapphire, gallium arsenide, and other related electronic materials. Molybdenum guide shells are used during the crystal growth process, ensuring the formation of a single, large crystal rather than multiple smaller crystals.


Molybdenum guide shells are also used in the production of high-purity quartz. The use of molybdenum guide shells helps to prevent contamination during the crystal growth process, resulting in a more uniform and high-quality product.


Overall, molybdenum guide shells are an essential component in the monocrystal furnace industry, ensuring the production of high-quality single-crystal materials used in the semiconductor, electronics, and other related industries.

Advantages and Disadvantages of Using Molybdenum Guide Shells in Monocrystal Furnace Processes

Molybdenum guide shells offer many advantages when used in monocrystal furnace processes. One of the primary advantages is their high melting point, which enables them to withstand the high-temperature conditions inside the furnace without deforming. Other advantages of molybdenum guide shells include their high thermal conductivity and excellent corrosion resistance, which prevent contamination of the crystal growth process.


Molybdenum guide shells are also highly durable, and their toughness and strength enable them to withstand the mechanical stresses generated during crystal growth, leading to more extended periods of use and reduced maintenance requirements.


However, there are some disadvantages associated with using molybdenum guide shells in monocrystal furnace processes. The first disadvantage is cost, as molybdenum is a relatively expensive material compared to other materials used in guide shells such as graphite and silicon carbide.


Another disadvantage is the relatively lower growth rate of crystal when using molybdenum guide shells compared to using other guide shell materials. This lower growth rate can lead to increased cycle times and longer process durations, increasing costs and affecting overall productivity.


Lastly, molybdenum guide shells require careful handling to prevent damage, and they must be stored in a controlled environment to prevent corrosion and reactions with other materials.


In conclusion, the advantages of using molybdenum guide shells in monocrystal furnace processes outweigh the disadvantages, with their high temperature resistance, high durability, and excellent corrosion resistance leading to enhanced quality, repeatability, and decreased maintenance.