Molybdenum Physical Properties Molybdenum Mechanical Properties Density 0.369 lb/in3

10.3 gm/cm3 Tensile Strength 150 (1035) ksi (Mpa)-RT Melting Point 4760 °F

2625 °C 75 (515) ksi (Mpa)-500°C Thermal Conductivity 0.35 cal/cm2/cm°C/sec 25 (175) ksi (Mpa)-1000°C Specific Heat 0.061 cal/gm/°C Elongation Thermal Expansion 4.9 micro-in/°C x 10-6

2.7 micro-in/°F x 10-6 Hardness 230 dph Electrical Resistivity 5.17 microohm-cm Modules of Elasticity 45000 ksi Recrystalization Temp. 1100 °C

Molybdenum Application And Properties

Vacuum Furnace Component

Molybdenum’s high strength and chemical stability make it ideally suitable to work under a high temperature and pressure condition. Therefore, the vapor pressure of molybdenum is far above the range of pressure a typical vacuum furnace creates. In the vacuum furnace, the internal components made of molybdenum materials are extensively employed when the temperature is lower than 1500°C. Unlike other refractory metals, such as tantalum and tungsten, molybdenum is easier and cheaper to fabricate but has a lower vapor pressure. However, because the typical temperature in the vacuum furnace is below than 1500°C, the molybdenum has been approved to be the most promising material to explore in further as furnace components.

The vacuum or high temperature furnace parts made of molybdenum include but are not limited to the following types:

Crucibles: Spun Mo crucible – Sintered Mo crucible – Plated worked Mo crucible – Forged Mo crucible – Welded Mo crucible

Spun Mo crucible – Sintered Mo crucible – Plated worked Mo crucible – Forged Mo crucible – Welded Mo crucible Charge Carriers, Boats: Mo frame – Mo annealing boat – Mo tray – Mo carrier – Mo-La sintering tray

Mo frame – Mo annealing boat – Mo tray – Mo carrier – Mo-La sintering tray Shieldings: Mo shielding – Mo-La shielding – W & Mo composite shielding

Mo shielding – Mo-La shielding – W & Mo composite shielding Fastener: Molybdenum washer – Molybdenum nuts

Molybdenum washer – Molybdenum nuts Silicon Furnaces: Mo flow guiding cylinder – Mo counterweight – Mo hook

Metal Hot Zone

Molybdenum is typically used all-metal hot zones for vacuum furnaces in which the temperature is up to 1500°C for resistor and insulation. Because the heat treatments for some cleanliness sensitive materials have to operate under an extremely clean and high-pressure environment. Thus, the high purity and stability of Molybdenum can effectively keep the operation away from carbon and oxygen contamination.

The molybdenum metal hot zones include but are not limited to the following types:

Heating Chamber

Annealing Furnace

Diffusion Welding Furnace

Hot Zone for KY

Semiconductor Manufacturing

Ion-implantation used for semiconductor manufacturing is under high temperature and the erosive chamber filled with reactive gases and a magnetic field. For example, molybdenum alloy components like ion source can resist to react with dopant gases and erode by the plasma. Thanks to the strength and chemical stability, molybdenum ensures the dopant atoms to be precisely created and implanted into the silicon wafer. Because of this, the molybdenum ion-source component cost less on its cleaning and maintaining work.

The semiconductor and electronic components made of molybdenum CHEMETAL can fabricate include but are not limited to the following types:

Ion Source Of Ion Implantation Equipment: Ion source – Face plate – End plate- Filament clamp – Filament – Repeller mod – Arc chamber

Ion source – Face plate – End plate- Filament clamp – Filament – Repeller mod – Arc chamber Waveguide Components

LED And Electronic Packaging Heat Sink: Molybdenum wafer substrate for LED chip – MoCu heat spreader – CMC laminate heat sink

Glass Melting Electrode

At first, the electrode for glass melting need to withstand an aggressive and high temperature processing environment. Due to molybdenum’s slow erosion rate and high creep resistance in molten glass, the damages to chemical and dimensional stability are negligible when molybdenum supplier made electrode immerses in variable glass chemistries. Thus, molybdenum is appraised to be the most common material to make melting electrodes.

In addition, molybdenum raw material has a high electrical conductivity. Therefore, high energy input and productivity will be obtained since molybdenum’s high electrical conductivity enables the current pass through the electrode at a good throughput.

Molybdenum Thin Film

Molybdenum thin film is an important part in technologies of TFT-LCD screen, solar panel. It is because molybdenum is characterized by the coefficient of thermal expansion, high chemical and thermal stability and good electrical conductivity. Therefore, those features make molybdenum an ideal choice to produce components for the solar cells and touch panel displays. For example, Mo thin films are used to make gate, drain and source electrodes of thin film transistor. Hence, Mo film technologies offer a high conversion rate to solar power. In addition, Molybdenum foil owns excellent thermal stability, heat resistance and radiation absorption capacity so that it is ideally served as a radiation shield and a core component of a collimator in CT equipment. Moreover, it can be used to make the boat for vaporization deposition.

Molybdenum Properties

High Density: 10.3 g/cm³

High Melting Point: 2625°C (4760 °F)

Low Vapor Pressure

High Tensile Strength

Low Coefficient of Thermal Expansion

Low Electrical Resistivity

Good Machinability

High Absorption Capacity

High Elastic Modulus

Molybdenum Applications