Tungsten Crucible
Specifications
1. SGS certified
2.professional manufacturer of tungsten crucible
3.Market: American, Russia, Germany, Japan, Korea, etc.
The properties of tungsten and molybdenum
| | Molybdenum | Tungsten |
Density | G/CM3 | 10.22 | 19.3 |
Melting point | oC | 2620 | 3410 |
Thermal conductivity | W/M.K | 98.8 (1400 oC ) | 174 (10--100 oC ) |
Resistivity | Ω.CM | 53.1 (1730 oC ) | 35 (1000 oC ) |
Vapor pressure | Pa | 7.09 X 10-6 (1600 oC ) | low |
Modulus | /MPa | 343 350 | 35 316 |
Thermal expansion coefficient | K-1 | 6.2 X 10-6 (700 oC ) | 4.5 X 10-6 (0--100 oC ) |
Hardness | HB | 35--125 | 290--350 |
Tensile strength | MPa | 687 | 981-1472 |
The Chemical compos ion of tungsten
Chemical compos ion W/(%) |
Brand | W | Impurity ≤ |
Al | Ca | Fe | Mg | Mo | Ni | Si | C | N | O |
W1 | Balance | 0 | 0.005 | 0.005 | 0.003 | 0.01 | 0.003 | 0.005 | 0.008 | 0 | 0.005 |
Sintered tungsten crucible
Sintered with tungsten powder the sintered tungsten crucibles are multi-purpose production in sintering furnace, large crystal growth furnace. Thickness of sintered tungsten crucibles is usually 8-12 mm; diameter is typically 100-550 mm; height is typically 50-700 mm. Such crucible Purity: W ≥ 99.95%; density is usually up 18.2g/cm3, by special needs the density can up 18.8g/cm3 or more.
Features:
1.The overall density of sintered tungsten crucible is fairy high between 18g/cm3 to 18.3g/cm3;
2.Its chemical purity of sintered tungsten crucible can be above 99.95%;
3.The diameter of sintered tungsten crucible can be above 200mm;
4.The surface roughness of tooled crucibles does not exceed Rz 6.3;
5.The use temperature of sintered tungsten crucible should be below 2450ºC in vacuum or deoxidize atmosphere.
6. The shapes and dimensions of crucibles are also made in accordance with customers' requirements.
Parameter of Sintered Tungsten Crucible:
Material | Density | Size |
W 99.95% | 18g/cm3—18.3 g/cm3 | Diameter: 100-550mm; Height:50-700mm |
Package and Inspection:
Every tungsten crucible is under strict nondestructive test and density detection. We offer material composition sheet and examination report of the sintered tungsten crucible. We also pack the crucibles in shock and moisture-proof plywood case independently.
Notice:
1.Before use, it is recommended that the consumer anneal (de-gas) crucibles in a vacuum without batch charging;
2.In a furnace, the annulment process should be supported with a vacuum at P< 10-3mmhg;
3.When preparing a sintered tungsten crucible for work, the consumer should not allow a sharp rise or fall in temperature, or abbreviate the recommended time periods for holding temperatures.
Stamped tungsten crucible
The tungsten crucibles can be produced of a tungsten plate by stamping, spinning, or welding. It can be used to produce single-use square or round crucible. Thickness typically 0.5 to 3 mm. Such tungsten crucible Purity: W ≥99.95%; density is usually up 19g/cm3
Forged tungsten crucible
The tungsten crucible can be made of tungsten rod by turning , generally they are smaller and with higher density. Usually the wall thickness 3-10 mm; diameter of 80 mm. They are widely used by sintering furnaces for ceramics and other materials
or vacuum evaporation coating machine. Purity: W ≥ 99.95%; density are usually based on different diameters of up to 18.3 to 19g/cm3
Your prompt response will be highly appreciated
Thanks with best regards!
Tinny
My email: sales#junde-tech.com
My Skype: junde201003
