Tungsten crucible, W crucible, high thermal stability for LED Sapphire single crystal growing application

Tungsten crucible is widely applying in high temperature vacuum furnace melting environment such as LED sapphire growing furnace

 

Crystal growth is a major stage of a crystallization process, which typically follows an initial stage of either homogeneous or heterogeneous (surface catalyzed) nucleation.

Crystal growth is a significant step for the semiconductor industry as well as for optical applications and solar industries. Sapphire single crystals are used for high power laser optics, high pressure components and substrates for LEDs. Aluminum Nitride(AlN) single crystals are the principal components for fabricating UV-LEDs and laser diodes (LDs).

We can produce many varieties of tungsten and molybdenum crucibles for single crystal growing process as a high temperature durability container in this application with its best properties.

      W crucibles       Mo crucibles       Customized crucibles         Lids        Dies      Heating shields

 

 

1. Physical and chemical properties

(1) Density: 18.3~19.2g /cm3(2) Surface roughness: < 3.2

(3) Purity:W99.97%(min.)

(4) Application temperature environment:1800~2750

 

2. Specifications:

1)Dimensions and tolerances Unit:mm

Delivery condition	Specification		Tolerance		Thickness	Roughness
	Diameter	Height	Diameter	Height
Sintering	10~500	10~750	±3.0	±3.0	8~20
Final Finished	10~450	10~550	±0.5	±1.0	7~18	<3.2

Special sizes can be manufactured based on customers' requirements

 

3. Manufacturing process and equipment

Item	Process	Equipment	Quality Check
1	Powder purified	Purified furnace	GDMS
2	Isostatic pressing	Isostatic pressing machine	Measurement of rough-processed
3	IF forging	High-accuracy forging machine	Dimension measurements for product
4	IF sintering	High temperature vacuum sintering furnace	Dimension measurements for product
5	Final machining	High-accuracy turning machine	Surface quality/ roughness and density
6	Package		Quality Test Report

 

4. Applications

Tungsten has a unique property of which it's melting point can reach 3410 tungsten crucible is widely applied in high temperature vacuum furnace melting environment such as sapphire growing furnace, quartz glass melting furnace, and rare earth melting furnace. The working temperature of tungsten crucible is above 2000. For sapphire crystal growing furnace, high-purity, high-density, no crack tungsten crucible with other features of exact measurement and smooth surface has decisive influence on the success of crystal growth, quality control of pulling crystal, discharging and service life during sapphire growing process.

 

5. Advantage of our Tungsten crucibles:- specially precise forming technology for tungsten crucible body - uniform grain with densified microstructure ensures longer life time - ready for use parts with precise machining tolerance.

 

Tungsten crucible, W crucible, high thermal stability for LED Sapphire single crystal growing application