Specifications

1.purity:99.95%
2we can produce and supply by the clients's drawings.
3.material:W1,W2

1,Measurements and tolerances

Tungsten crucible for Sapphire crystal growthing furnace

 

Unit:mm

Delivery condition	Specification		Tolerance		Thickness	Roughness  (μm)
	Diameter	Height	Diameter	Height
Sinter	10~700	10~1000	±5.0	±5.0	5~30
Finished sinter	10~650	10~850	±0.5	±1.0	7~25	<2.5

Special sizes can be manufactured based on customers' requirements

 

2,Physical and chemical properties

 1  Purity :W≥99.95%;

 2  Density:≥18.2g/cm3;

 3  Application temperature environment:2300°C.

 

Product Name					Tungsten crucible
Material Composition					Tungsten
Purity					99.95%
Density					≥17.8g/cm3
Using temperature					within2000°C
Highest temperature Tolerance					2400°C ±0.5mm
Smooth degree					Ra≤3.2
Quantitative analysis
Element	Ni	Mg	Fe	Pb	Al	Bi	Si	Mo	Ca	P
Concentration(%)	0.001	0.0005	0.002	0.0001	0.0005	0.0001	0.001	0.002	0.0005	0.001
Element	C	O	N	Sb	Cu
Concentration(%)	0.001	0.003	0.0006	0.0006	0.0006
Purity(Metallic Base) W≥99.95%

 

 

 

3,Application

Since the melting point of tungsten has reached 3410°C, tungsten crucible is widely applied in  industry furnace such as sapphire growth furnace, quartz glass melting furnace, and rare earth smelting furnace.The temperature in working environment of tungsten crucible is above 2000°C. For sapphire crystal growth furnace, high-purity, high- density, no internal -crack tungsten crucible with other features of exact measurement and smooth surface has decisive influence on success ratio of seed growth, quality control of pulling crystal, metamictization pot-committed and service life during sapphire growth process.

 

Tungsten crucible Liners are very useful in electron-beam evaporation as they typically increase the evaporation rates of the material being deposited and they simplify the task of changing from one evaporation material to another. Crucible Liners are available in a variety of sizes.