Tungsten crucible

tungsten crucible
Advantages:
1. High density
2. High strength
3. Withgood weld-ability and process-ability
4. Low thermal expansion
5. Anti-erosion

Specifications
1. Tungsten Crucibles
2. Grade: W1, W2, W3, W4
3. Density:17.8g/cm3
4. Chemical Composition: tungsten>=99.95%
5. Appearance: Silver gray metallic luster
6. High: max500mm, bottom thickness:min15mm, Tolerance:±0.5mm
7. Smooth degree: Ra≤3.2
8. Using temperature: Within 2000°C
9. Standard: ASTM GB
10. Tungsten Crucible and Molybdenum Crucible are used in growing sapphire,
crystal and rare earths industry.
11.
Quantitative analysis
Element Ni Mg Fe Pb Al Bi Si Mo
Concentration 0.001 0.0005 0.002 0.0001 0.0005 0.0001 0.001 0.002
Element C O N Sb Cu Ca P
Concentration 0.001 0.003 0.0006 0.0006 0.0006 0.0005 0.001

12. 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.
13. 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.
14. 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
15. 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
16. 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.
Applications
Tungsten crucible is mainly used used for rare earth,sapphire single crystal
growth furnace , quartz glass,
Metal extracting, metallurgical industry, machinery processing, glass and
ceramic industries, etc.

Minimum Order: 1 pieces

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