Tungsten crucible is widely applying in high temperature vacuum furnace melting environment such as LED sapphire growing furnace
Tungsten crucible and Mo crucibles are now widely applying in high temperature vacuum furnace melting environment such as LED sapphire,single crystal growing furnace
Crystal growth is a major stage of a crystallization process, which typically follows an initial stage of either homogeneous or heterogeneous (surface catalyzed) nucleation.
Crystal growth is a significant step for the semiconductor industry as well as for optical applications and solar industries. Sapphire single crystals are used for high power laser optics, high pressure components and substrates for LEDs. Aluminum Nitride(AlN) single crystals are the principal components for fabricating UV-LEDs and laser diodes (LDs).
We can produce many varieties of tungsten and molybdenum crucibles for single crystal growing process as a high temperature durability container in this application with its best properties.
W crucibles Mo crucibles Customized crucibles Lids Dies Heating shields
1. Physical and chemical properties
(1) Density: 18.3~19.2g /cm3
(2) Surface roughness: < 3.2
(3) Purity:W99.97%(min.)
(4) Application temperature environment:1800~2750
2. Specifications:
1)Dimensions and tolerances Unit:mm
Delivery condition | Specification | Tolerance | Thickness | Roughness | ||
Diameter | Height | Diameter | Height | |||
Sintering | 10~500 | 10~750 | ±3.0 | ±3.0 | 8~20 |
|
Final Finished | 10~450 | 10~550 | ±0.5 | ±1.0 | 7~18 | <3.2 |
Special sizes can be manufactured based on customers' requirements
3. Manufacturing process and equipment
Item | Process | Equipment | Quality Check |
1 | Powder purified | Purified furnace | GDMS |
2 | Isostatic pressing | Isostatic pressing machine | Measurement of rough-processed |
3 | IF forging | High-accuracy forging machine | Dimension measurements for product |
4 | IF sintering | High temperature vacuum sintering furnace | Dimension measurements for product |
5 | Final machining | High-accuracy turning machine | Surface quality/ roughness and density |
6 | Package |
| Quality Test Report |
4. Applications
Tungsten has a unique property of which it's melting point can reach 3410 tungsten crucible is widely applied in high temperature vacuum furnace melting environment such as sapphire growing furnace, quartz glass melting furnace, and rare earth melting furnace. The working temperature of tungsten crucible is above 2000. For sapphire crystal growing furnace, high-purity, high-density, no crack tungsten crucible with other features of exact measurement and smooth surface has decisive influence on the success of crystal growth, quality control of pulling crystal, discharging and service life during sapphire growing process.
5. Advantage of our Tungsten crucibles:
- specially precise forming technology for tungsten crucible body
- uniform grain with densified microstructure ensures longer life time
- ready for use parts with precise machining tolerance.
