Hubei Fotma Machinery Co., Ltd.
Tungsten, Molybdenum, Titanium, Tungsten Carbide and Investment Casting Products
| Place of Origin: | P.R. China |
|---|---|
| Brand Name: | FOTMA |
| Certification: | ISO 9001:2000 |
| Model Number: | Customized |
| Minimum Order Quantity: | 1 unit |
| Price: | Negotiable |
| Packaging Details: | Plywood Boxes |
| Delivery Time: | 20-25 days |
| Payment Terms: | T/T, L/C, Western Union, PayPal |
| Supply Ability: | 2 MT / Month |
| Purity: | 99.95% | Diameter: | 10mm - 150mm |
|---|---|---|---|
| Height: | 10mm - 750mm | Wall Thickness: | 2mm - 10mm |
| Density: | ≥ 19.1 G / Cm3 | Tolerance: | + / - 0.5mm |
| High Light: | 2500 Centigrade Tungsten Crucible,750mm Height Pure Tungsten Liner,18.5g/cm3 Pure Tungsten Liner |
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Pure Tungsten Products Liners / Crucibles Working Temperature 2500℃ Surface Machined
Tungsten liners are widely used in industrial vacuum furnaces such as sapphire single crystal growth furnace, quartz glass melting furnace, rare earth smelting furnace and other industrial furnaces of which the working temperature is over 2000℃. Especially for sapphire single crystal growth furnace, tungsten liner with features of high purity, high density, no crack, precise size, smoothy internal and external wall is the key note to seed success rate, crystal quality control, off crystal stick pan and service life in sapphire crystal growth process.
During sapphire production, Al2O3 - the compound that is to become the future single crystal - is melted in tungsten crucibles. It is in the Kyropoulos process that our crucibles show their strengths to best effect. They arerepeatedly heated to more than 2 000 °C (3632 °F) and then cooled down again. This process, which would cause fissures and distortions in other materials, is not a problem for our products.
Specifications of Pure Tungsten Liners:
|
W purity |
Density |
Size |
Tolerance |
Wall thickness |
Surface roughness |
|||
|
99.95% |
≥19.35g/ cm3 |
Diameter(mm) 10-500 |
Height(mm) 10-750 |
For Dia. +/-5.0 |
For Height +/-5.0 |
8-20 |
Ra=1.6 |
|
Specifications of Sintered Tungsten Liners
|
W purity |
Density |
Size |
Tolerance |
Wall thickness |
Surface roughness |
W purity |
||
|
99.95% |
≥18.5g/ cm3 |
Diameter(mm) 10-500 |
Height(mm) 10-750 |
For Dia. +/-5.0 |
For Height +/-5.0 |
8-20 |
Ra=1.6 |
|
Surface Finish of Tungsten Liners:
|
Diameter(mm) |
Thickness(mm) |
Height(mm) |
Surface finish |
Inner surface |
Inner bottom finish |
|
30 ~ 50 |
2 ~ 10 |
≤500 |
≤Ra2.0 |
≤Ra2.4 |
≤Ra2.8 |
|
50 ~ 100 |
3 ~ 15 |
≤1000 |
≤Ra2.0 |
≤Ra2.4 |
≤Ra2.8 |
|
100 ~ 150 |
3 ~ 15 |
≤1000 |
≤Ra2.0 |
≤Ra2.4 |
≤Ra2.8 |
|
150 ~ 200 |
5 ~ 20 |
≤1000 |
≤Ra2.0 |
≤Ra2.4 |
≤Ra2.8 |
|
200 ~ 300 |
8 ~ 20 |
≤1000 |
≤Ra2.0 |
≤Ra2.4 |
≤Ra2.8 |
|
300 ~ 400 |
8 ~ 30 |
≤1000 |
≤Ra2.0 |
≤Ra2.4 |
≤Ra2.8 |
|
400 ~ 450 |
8 ~ 30 |
≤1000 |
≤Ra2.0 |
≤Ra2.4 |
≤Ra2.8 |
|
450 ~ 600 |
8 ~ 30 |
≤1000 |
≤Ra2.0 |
≤Ra2.4 |
≤Ra2.8 |
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