Sintered Molybdenum Crucible For Sapphire Growth Furnace
1. Sintered molybdenum crucible for sapphire growth furnace description:
Sintered molybdenum crucibles are made primarily by evenly mixing molybdenum powder in the mold, placing it there, die-casting using the isostatic pressing process, then sintered at high temperature, followed by machining, and polishing the molybdenum crucible's outer and inner surfaces. This process is mainly used to produce large molybdenum crucibles.
Sintered molybdenum crucible or tungsten crucible is the most commonly used crucible in sapphire crystal growth furnace and quartz glass, rare earth smelting industry. Sintered molybdenum crucible consists of straight wall crucible, conical crucible and other shapes.
2. Size of Sintered Molybdenum Crucible For Sapphire Growth Furnace:
Sintered Molybdenum Crucible
| Puirty | Density | Size | Tolerance | Wall thickness | Surface roughness |
| 99.95% | ≥9.8g/ cm3 | Diameter(mm) 100-600 | Height(mm) 100-1000 | Diameter +/-0.5 | Height +/-2.0 | 8-20(mm) | Ra=1.6 |
Machined Molybdenum Crucible
| Purity | Density | Size | Tolerance | | Wall thickness | Surface roughness |
| 99.95% | ≥10.2 | Diameter(mm) 10-100 | Height(mm) 10-200 | Diameter +/-0.2 | Height +/-1.0 | 1-20(mm) | Ra=1.6 |
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3. Actual Tested Chemical content of Sintered Molybdenum Crucible For Sapphire Growth Furnace:
| Quantitative analysis |
| Element | Ni | Mg | Fe | Pb | Al | Bi | Si | Cu | Ca | P |
| Concentration(%) | 0.0006 | 0.0006 | 0.001 | 0.0006 | 0.003 | 0.0006 | 0.003 | 0.0006 | 0.0006 | 0.001 |
| Element | C | O | Sb | | | | | | | |
| Concentration(%) | 0.001 | 0.005 | 0.0006 | | | | | | | |
| Purity(Metallic Base) Mo≥99.95% |
4. Manufacturing Process of Sintered Molybdenum Crucible For Sapphire Growth Furnace:
| Item | Process | Equipment | Quality Check |
| 1 | Powder purified | Purified furnace | GDMS |
| 2 | Isostatic pressing | Isostatic pressing machine | Measurement of rough-processed |
| 3 | IF hammering | high-precision forging apparatus | Product dimension measurements |
| 4 | SHOULD sintering | Vacuum high-temperature sintering furnace | Product dimension measurements |
| 5 | Final machining | High-accuracy turning machine | Surface quality/ roughness and density |
| 6 | Package | | Quality Test Report |
5. Advantage of Sintered Molybdenum Crucible For Sapphire Growth Furnace:
- uniform grain with densified microstructure ensures longer use time.
- High special strenghth,high melt point
- excellent corrosive resistance,good thermal resistance.
- Pure molybdenum crucible has good high temperature oxidation resistance and electrochemical corrosion resistance, and does not deform under high temperature operating conditions. It works well as an additional material under high temperatures.
6. Use of a Sintered Molybdenum Crucible in a Sapphire Growth Furnace:
Since the melting point of molybdenum is as high as 2610 °C, molybdenum crucibles are widely used in core containers in industrial furnaces such as sapphire single crystal growth furnaces, furnaces for melting quartz glass and for smelting rare earth elements. The working temperature environment used is generally above 2000 °C. Especially for the sapphire single crystal growth furnace, the molybdenum crucible with high purity, high density, no internal cracks, accurate size, smooth inner and outer walls, etc. Decrystalline sticking to the pan and service life play a key role.
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