Molybdenum sheets are the ideal choice for the heating band of vacuum furnaces due to their outstanding performance
In the field of vacuum high-temperature technology, the heating belt serves as the core heating component, and the selection of its material directly determines the performance boundaries and application efficiency of the equipment. The reason why molybdenum sheets have become the preferred material for heating belts in vacuum furnaces is due to the excellent balance of their comprehensive properties. The melting point of molybdenum is as high as 2620℃, enabling it to operate stably for a long time at temperatures above 1800℃, and maintaining good high-temperature strength, without undergoing creep or deformation. This characteristic lays the foundation for molybdenum sheets to be used as a high-temperature heating material, especially suitable for industrial scenarios that require continuous ultra-high-temperature processes. Additionally, the resistivity of molybdenum is moderate, and the resistance temperature coefficient is stable, which allows the heating belt to achieve uniform power output during the heating process, effectively improving the uniformity of the temperature field within the furnace and the accuracy of temperature control, creating an ideal thermal environment for precise heat treatment and crystal growth.
From the perspectives of thermal physics and chemical stability, molybdenum sheets exhibit extremely low vapor pressure and excellent chemical inertness in vacuum or inert atmospheres. In a high-temperature vacuum environment, molybdenum hardly volatilizes and does not react with common process gases, effectively avoiding the problems of material volatilization contaminating the furnace or affecting the purity of the workpiece. This characteristic is of crucial importance for applications such as semiconductor manufacturing, high-purity material synthesis, and optical crystal growth, which have extremely high requirements for cleanliness. Additionally, molybdenum has a low thermal expansion coefficient and excellent thermal shock resistance, capable of withstanding thermal stress shocks during rapid temperature changes, significantly extending the service life of the heating zone and reducing equipment maintenance costs.
Although tungsten has a higher melting point and high-temperature strength than molybdenum in certain extreme temperature environments, its resistance temperature coefficient is relatively large, resulting in significant changes in heating characteristics with temperature, and a complex dynamic current regulation system is required to achieve stable temperature control. This increases the complexity of equipment design and operation. In contrast, molybdenum sheets maintain sufficient high-temperature performance while having more stable resistance characteristics, better uniform heating, and stronger process controllability. Therefore, in most vacuum furnace applications, molybdenum sheets exhibit superior comprehensive applicability and economic efficiency. Especially in fields with high temperature uniformity requirements and important process stability, the heating bands of molybdenum sheets demonstrate irreplaceable advantages.
From the perspectives of processing, manufacturing and engineering application, molybdenum sheets also possess excellent plasticity and machinability. They can be processed into various complex-shaped heating bands through methods such as stamping, welding and bending, meeting the design requirements of different furnace types. Whether in the form of strips, spirals or meshes, molybdenum sheets can achieve high-precision shaping, ensuring the dimensional stability and electrical connection reliability of the heating elements during assembly. This processing flexibility, combined with its outstanding high-temperature performance, enables molybdenum sheet heating bands to adapt to various vacuum furnace types and process requirements, and is widely used in fields such as sapphire crystal growth, vacuum sintering, high-temperature annealing, and ceramic metallization.
Molybdenum sheets, with their high melting point, stable resistance characteristics, excellent high-temperature chemical stability, good thermal shock resistance, and mature processing technology, have become the ideal choice for heating belts in vacuum furnaces. They not only ensure the efficient, stable and long-lasting operation of vacuum high-temperature equipment, but also provide a reliable thermal foundation for precision manufacturing and advanced material synthesis. With the continuous development of high-temperature industrial technology, the application potential of molybdenum sheets in heating elements will be further unleashed, continuously driving vacuum heat treatment and crystal growth technologies towards higher temperatures and more precise control.
The molybdenum hot zone is in high demand in various parts of the world, such as: USA, Canada, Chile, Brazil, Argentina, Colombia, Germany, France, United Kingdom, Italy, Sweden, Austria, Netherlands, Belgium, Switzerland, Spain, Czech Republic, Poland.
As a Chinese Manufacturer, Mosten Alloy can produce molybdenum crucible, molybdenum tube, molybdenum sheet, molybdenum pellet, molybdenum block, molybdenum foil, molybdenum rod, molybdenum wire, molybdenum processing workpiece according to customer demand. If you have any questions, please send email to info@mostenalloy.com.
