Seamless Tungsten Crucible For Sapphire Crystal Growth in High
Temperature Furnace 2000℃
Tungsten crucibles are used as furnace components and fixtures in
the hot zone of sapphire growth furnace. These high-temperature
materials have high thermal conductivity, low thermal expansion
coefficient, and good strength and stability above 2000 ℃.
Condition : Sintering or forging.
| Material | Density | Size |
| w 99.95% | 19.1g/cm3(Forging) | Diameter:10-100mm; High:10-120mm |
| w 99.95% | 18.3g/cm3(Sintering) | Diameter:100-650mm; High:50-850mm |
Measurements of Customized 99.95% Tungsten Crucible(mm):
| Delivery condition | Specification | Thickness | Roughness(μm) |
| Diameter | Height |
| Sinter | 10~700 | 10~1000 | 5~30 | |
| Finished sinter | 10~650 | 10~850 | 7~25 | <2.5 |
Description of Tungsten Crucible:
Tungsten crucible is a crucible made of tungsten. Tungsten crucible
has the characteristics of high melting point, high strength and
hardness, good high temperature performance, low electrical
resistivity, small expansion coefficient and small electron escape
work. So tungsten crucible is an important component of sapphire
long crystal furnace.
As a container for high temperature environment, tungsten crucible
is used in sapphire long crystal field, rare earth smelting,
coating and other industries.
Tungsten crucibles have different production processes according to
different overall dimensions and service conditions. Common
crucible shapes are round, square, strip, V-shaped, etc. The
manufacturing process includes sintering forming, welding forming,
stamping forming and spinning forming, among which sintering
products are most widely used. For micro and small tungsten
crucibles, forged tungsten rods can be used for turning or
stamping. The welding process of tungsten sheet adopts hot bending
of rolled tungsten plate, which is finally fixed by welding.
Spinning is suitable for producing thin-wall tungsten crucible with
high process requirements.
Tungsten Crucible Application:
In terms of use, tungsten crucibles are widely used in rare earth
smelting, quartz glass, electronic spraying, crystal growth and
other industries. They are mainly used in industrial furnaces such
as rare earth metal smelting furnace, quartz glass smelting
furnace, induction furnace heater, high-temperature container of
single crystal furnace, sapphire single crystal growth furnace,
high-temperature vacuum furnace and so on. The working temperature
is generally above 2000 ° C. Note: during the growth of sapphire
crystal, the tungsten crucible shall have the characteristics of no
internal crack, accurate size, and smooth internal and external
walls.
Advantages of Tungsten Crucible Supplied by Sanhui:
We are able to supply a complete set of testing equipment for
physical properties like density, hardness, surface roughness and
so on. Accordingly, the possible internal injury of tungsten
crucible like porosity and crack can be strictly inspected while
using the eddy current tester and ultrasonic equipment, so as to
ensure the high quality.
