High Purity Molybdenum Foil

 

High Purity Molybdenum Foil is a thin sheet-like material made of metallic molybdenum (Mo), with a purity typically exceeding 99.95%. Common specifications include 99.97%, 99.99%, and even 99.999%. It combines the outstanding physical and chemical properties of molybdenum metal with the lightness, thinness, and flexibility of foil materials, making it an indispensable key material in many high-tech fields. Pure Molybdenum Foil is a commonly used term for high-grade molybdenum materials in industrial and engineering applications.

 

 

1.The high purity advantage is remarkable.

The purity of this molybdenum foil exceeds 99.95%. This characteristic significantly reduces the negative impact of impurities. The iron, nickel, carbon and other impurities present in ordinary molybdenum will reduce its electrical conductivity and thermal conductivity, and may even form brittle phases under high-temperature conditions. However, the molybdenum foil ensures stable and reliable performance. High purity enables the molybdenum foil to withstand temperatures of up to 1900°C or higher in an inert atmosphere or vacuum. In semiconductor or electron beam applications, impurities may cause micro-leakage or uneven emission. High-purity molybdenum foil becomes an essential material to meet such strict requirements.

 

2. Unique foil shape

The thickness range of this molybdenum foil typically falls between 0.005 mm and 0.1 mm (5 microns to 100 microns). The width and length can be customized according to customer requirements. Although molybdenum is a hard metal by nature, when its thickness is reduced to a certain extent, the molybdenum foil acquires a certain degree of flexibility, facilitating operations such as winding, punching, or layering. Moreover, its sheet-like shape enables it to have a higher specific surface area, which can result in higher efficiency in applications requiring extensive contact, such as heating, shielding, or catalysis.

 

3. The inherent advantages of molybdenum metal are prominent

The molybdenum foil inherits many excellent characteristics of molybdenum metal. Its melting point is as high as 2620°C, much higher than that of common metals such as stainless steel, copper or aluminum. The low thermal expansion coefficient is approximately 4.8 × 10⁻⁶ /K, similar to that of silicon and glass ceramics, resulting in relatively small thermal stress. In terms of electrical and thermal conductivity, it is about 1/3 of that of copper, but far superior to many high-temperature alloys. Moreover, the molybdenum foil has excellent thermal shock resistance, capable of withstanding drastic temperature changes without cracking, and has stable corrosion resistance to most acids (except hydrofluoric acid and concentrated nitric acid) and molten metals.

 

 

 

Pure Molybdenum Foil is widely applied across multiple high-performance industries due to its stability and consistency.

1.In the field of high-temperature furnace components

In a vacuum or protected atmosphere furnace, The molybdenum foil can be used as a heat insulation screen. By stacking multiple layers of molybdenum foil, it effectively reflects thermal radiation. At the same time, it can also be made into heating strips, trays, crucibles, etc., and used for sintering materials such as sapphire, ceramics, and hard alloys, meeting the usage requirements in high-temperature environments.

 

2. Semiconductor and Electronics Field

During the ion implantation process, High Purity Molybdenum Foil can be used as a gate electrode and an accelerating electrode; in MOCVD (Metal Organic Chemical Vapor Deposition) equipment, it can be used as a heating substrate; in the flat panel display (such as TFT-LCD) field, it can be used as a backboard material for sputtering molybdenum target; in power electronic devices, it can also be used as a heat sink or heat dissipation plate to ensure the normal operation of electronic devices.

 

3. Aerospace and Defense Field

The molybdenum foil can be used to manufacture rocket nozzles and the high-temperature-resistant shielding layer at the leading edge of missile tail wings, which can withstand extreme high-temperature environments. In liquid metal (such as lithium, lead-bismuth alloy) circuits, it can be used as a foil seal component to ensure the sealing and stability of the system.

 

4. Medical Device Field

In X-ray tubes, The molybdenum foil can serve as the rotating support structure for the target plate, leveraging its high thermal conductivity and low gas permeability to ensure the performance of the X-ray tube. In radiotherapy collimators, multiple layers of molybdenum foil can form gratings to achieve precise radiotherapy positioning.

 

5. Research and New Energy Field

In the high-temperature and high-pressure synthesis experiments in the laboratory, The molybdenum foil can be used as a heating element to provide a stable high-temperature environment. In solid-state batteries or fuel cells, it can be used as a current collector or an isolation layer to enhance the performance of the battery. Additionally, it can also be used as a protective coating on the surface of graphite or carbon-carbon composite materials to extend the service life of the materials.

 

 

 

Item	Specification
Material	High Purity Molybdenum (Mo)
Purity	≥ 99.9% (3N) / up to 99.99% (4N)
Density	10.2 g/cm³
Thickness Range	0.01 – 0.5 mm (customizable)
Width	≤ 300 mm (customized available)
Length	Coil or cut-to-size sheets
Surface Condition	Bright / Rolled / Polished
Melting Point	2623°C
Operating Temperature	Up to 1800°C (vacuum/inert atmosphere)
Max Temp (Oxidizing)	≤ 600°C
Tensile Strength	≥ 600 MPa (typical)
Elongation	5% – 15%
Thermal Conductivity	~138 W/m·K
Thermal Expansion Coefficient	~4.8 × 10⁻⁶ /K
Standard	ASTM B386 / GB/T 3876
Applications	Semiconductor, vacuum furnace, aerospace, electronics, scientific research
Processing	Rolling, cutting, annealing (custom OEM available)

 

 

 

 

 

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