OMT provides complete service for copper tungsten, copper molybdenum, pure molybdenum, Cu-Mo-Cu and Cu-Mo70Cu-Cu heat sinks.

A heat sink is designed to maximize its surface area in contact with the cooling medium surrounding it, such as the air. Air velocity, choice of material, protrusion design and surface treatment are factors that affect the performance of a heat sink.
MoCu and WCu materials (molybdenum copper & tungsten copper composites) are widely used in heat sinks because of their good Thermal Conductivity and Coefficient of Thermal Expansion, the price is lower than GaN and SiN heat sinks.

Properties for heat sinks by molybdenum copper and tungsten copper.

Composites of heat sink W88Cu W85Cu W80Cu Mo90Cu Mo88Cu Mo85Cu Mo20Cu
Coefficient of Thermal Expansion (10-6/K) 5.57 5.7 6.76 5.60 5.75 5.95 6.98
Thermal Conductivity (W/m·K) 188 196 220 160 170 187 215
Heat sink size 2”,4” diameter x Thickness, with gold and other coatings

Besides MoCu and WCu heat sinks, we can also provide pure molybdenum, Cu-Mo-Cu, Cu-MoCu-Cu parts

Cu-Mo-Cu Heat Sinks Specification:

Cu: Mo: Cu (Thick ratio) Density (g/cc) Coefficient of Thermal Expansion (10-6/K) Thermal Conductivity (W/m·K), x-y direction Thermal Conductivity (W/m·K), x-z direction
1:1:1 9.4 9.4 300~310 240~250
1:2:1 9.6 7.7 260~270 210~220
1:3:1 9.7 6.9 230~240 190~200
1:4:1 9.8 6.2 210~220 170~180
13:74:13 9.9 5.8 190~200 160~170

Cu-Mo70Cu-Cu Heat Sinks Specification:

Cu-Mo70Cu-Cu
(Thick ratio)
Density (g/cc) Coefficient of Thermal Expansion (10-6/K) Thermal Conductivity (W/m·K)
Plate direction Thick direction Plate direction Thick direction
1:4:1 9.46 7.2 9.0 340 300

OMT provides complete service for copper tungsten, copper molybdenum, pure molybdenum, Cu-Mo-Cu and Cu-Mo70Cu-Cu heat sinks. Send your request to sales@oasismaterialstech.com.

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