
Tungsten Crucible
Since the melting point of tungsten has reached 3410ºC, Tungsten crucible is widely applied in industry furnace such as sapphire growth furnace. Quartz glass melting furnace and rare earth smelting furnace. The temperature in working environment of tungsten cruible is above 2000ºC, for sapphire crystal growth furnace, high-purity. High-density, no internet crack tungsten crucible with other features of exact measurement and smooth inner surface has decisive influence on success ratio of seed growth quality control of pulling crystal metamictization pot-committed and service life during sapphire growth process.
Physical and chemical properties
Parameters of Tungsten Crucible
Delivery condition | Specification | Tolerance | Thickness | Roughness (m) | ||
Diameter | Height | Diameter | Height | |||
Sinter | 10~500 | 10~750 | ±5.0 | ±5.0 | 8~20 |
|
Finished sinter | 10~450 | 10~550 | ±0.5 | ±1.0 | 7~18 | 2.5 |
Special sizes can be manufactured based on customers requirements
Manufacturing process and equipment
Item | Process | Equipment | Quality Check point |
1 | Tungsten powder |
| 1 Purity of tungsten powder |
2 | Sieving | High frequency vibrating screen | 2 Fsss HB |
3 | Mixed powder | V shape mixer | 3 Green strength |
4 | Isostatic pressing | Isostatic pressing machine | 1 Measurement of rough-processed billet |
5 | Rough billet lathing | CNC vertical turning machine | 2 Surface quality of rough-processed billet |
6 | IF sintering | IF induction sintering furnace | 1 Outside measurements of finished product |
7 | Competitive products lathing | High-accuracy vertical turning machine | 2 Surface quality and roughness of finished product,density |
8 | Package |
| 3 Show certificate of quality |
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