High Temperature Resistant Molybdenum Boat

Description Of High Temperature Resistant Molybdenum Boat

High Temperature Resistant Molybdenum Boat is a high-performance refractory metal component manufactured from high-purity molybdenum (Mo1 grade, purity ≥99.95%) through powder metallurgy, rolling, and precision machining processes. The boat features a boat-shaped structure with a central recess for holding materials and extended ends for electrical connection. It is specifically designed for use in extreme high-temperature environments, including vacuum coating systems, PVD equipment, and high-temperature furnaces.

Molybdenum offers a unique combination of properties that make it ideal for high-temperature applications. With a melting point of 2610°C–2620°C (the third-highest among all elements, after tungsten and tantalum), molybdenum boats can withstand continuous operating temperatures up to 1800°C in vacuum or inert gas atmospheres without softening or deformation. The material also offers excellent thermal conductivity (~138 W/m·K), a low coefficient of thermal expansion (5.1×10⁻⁶/K), and low vapor pressure at elevated temperatures.

In vacuum coating processes, molybdenum boats serve as both a container and a resistive heating element. When electric current passes through the boat, it generates heat through resistance, melting and vaporizing the material placed in the recess. The vaporized atoms then travel through the vacuum chamber and deposit onto the substrate, forming a thin functional film. Molybdenum boats are widely used for evaporating aluminum, silver, gold, copper, chromium, and other metals.

Compared to tungsten boats, molybdenum boats offer a lighter weight (density 10.2 g/cm³ vs. 19.3 g/cm³ for tungsten), lower cost, and easier machinability, while still providing reliable high-temperature performance for many evaporation and furnace applications.

Features Of High Temperature Resistant Molybdenum Boat

High Purity: Mo ≥ 99.95% ensures minimal contamination in high-temperature processes, making it suitable for semiconductor and optical coating applications.

High Melting Point: 2610°C–2620°C enables stable operation at temperatures up to 1800°C in vacuum or inert gas atmospheres.

Excellent Thermal Stability: Molybdenum boats maintain their shape and mechanical properties at elevated temperatures, resisting deformation and creep.

Excellent Thermal Conductivity: ~138 W/(m·K) ensures uniform heating and efficient heat transfer to the evaporant or material being processed.

Low Vapor Pressure: Molybdenum does not evaporate significantly at operating temperatures, ensuring clean evaporation and long boat life.

Good Corrosion Resistance: Resists corrosion from many molten metals, acids, and alkalis

Lighter Than Tungsten: Density of 10.2 g/cm³ makes molybdenum boats easier to handle and install compared to tungsten boats (19.3 g/cm³).

Cost-Effective: Lower material and machining costs compared to tungsten, while providing reliable performance for many applications.

Multiple Configurations: Available in stamped, folded, welded, and riveted designs, with custom sizes and shapes upon request.

Specifications Of High Temperature Resistant Molybdenum Boat