Tungsten Crucible

Tungsten Crucible Data Sheet

Reference:	HMWW1118
Dimensions:	Diameter: 10-500 mm Wall Thickness: 8-20 mm Height: 10-750 mm
Material:	Tungsten and Tungsten Heavy Alloy
Shape:	Cylinder, Square, Rectangular, Tapered, Threaded, or customized according to specific drawings
Purity:	99%, 99.9%, 99.95%, 99.99%, 99.999%
Surface:	Grinding, Finish turning
Temper:	Annealed or Unannealed

Tungsten Crucible

Tungsten Crucibles are high-temperature resistant vessels made of high-purity tungsten material. Additionally, the inclusion of certain rare earth elements in the production of pure tungsten crucibles can enhance their oxidation resistance, thereby extending the product’s service life. They are generally cylindrical in shape, with diameters ranging from 10-500 mm, heights ranging from 10-750 mm, and wall thicknesses ranging from 8-20 mm. Shanghai Yuepeng can also customize the size, shape, and tolerance to meet specific requirements.

Tungsten Crucible Material Chemical Composition

W (>%)	Chemical Content (<%)
99.999 W1	Fe	Ca	Be	Sn	Al	Ni	Zn	Sb	Pt	K	Ta	Na
	0.0001	0.00005	0.000005	0.000005	0.00005	0.00001	0.00005	0.00005	0.00003	0.000005	0.0001	0.00005
	Cr	Pb	As	Mg	Ti	Bi	Mo	Cd	Cu	Ba	Co	Mn
	0.000005	0.00001	0.00005	0.00005	0.000005	0.00001	0.00001	0.000005	0.000007	0.00001	0.000005	0.000005
99.99 W2	Fe	Ca	Be	Sn	Al	Ni	Zn	Sb	Pt	K	O	Na
	0.0001	0.00045	0.0001	0.0001	0.0001	0.0001	0.0001	0.0001	0.0001	0.0005	0.0040	0.0009
	Cr	Pb	As	Mg	Ti	Bi	Mo	Cd	Cu	Ba	Co	Mn
	0.0001	0.0001	0.0001	0.0001	0.0001	0.0001	0.0002	0.0001	0.0001	0.0001	0.0001	0.0001
99.95 W3	Fe	Ca	P	Sn	Al	Ni	N	Sb	Si	O	Pb	As
	0.005	0.003	0.001	0.0001	0.002	0.003	0.003	0.001	0.003	0.003	0.0001	0.002
	Mg	C	Bi	Mo
	0.002	0.005	0.0001	0.001

Tungsten Crucible Stock Dimensions

Diameter（mm）		Wall Thickness（mm）		Height（mm）		Roughness
Diameter	Tolerance	Wall Thickness	Tolerance	Height	Tolerance
30~50	±0.5	2~10	±0.5	20~80	±0.5	Ra≤1.6
50~100	±1	3~15	±1	20~80	±1	Ra≤1.6
100~150	±1	5~15	±1	20~500	±1.5	Ra≤1.6
150~250	±1	5~20	±1	30~500	±1.5	Ra≤2.5
250~350	±1.5	8~30	±1	30~500	±2	Ra≤2.5
350~450	±1.5	8~30	±1	30~550	±2	Ra≤2.5

Tungsten Ingot Properties

• High density
• High melting point
• High Hardness
• Low vapor pressure
• Slow evaporation rate
• Low thermal expansion coefficient
• Good thermal conductivity
• Good corrosion and wear resistance

Tungsten Crucible Production Process

• Raw Material: Select high-purity tungsten powder.
• Powder Metallurgy: High-purity tungsten powder is mixed, pressed, and molded into the preliminary shape of the crucible. Common methods include isostatic pressing and die pressing.
• Sintering: The molded tungsten crucible is placed in a high-temperature furnace and sintered under a vacuum or inert gas environment, usually at temperatures above 2000 ℃.
• Machining: After sintering, the crucible undergoes further machining, including turning, milling, and polishing, to achieve precise dimensions and surface smoothness.
• Surface Treatment: Coating, oxidation, or heat treatment to enhance the high-temperature resistance, corrosion resistance, and oxidation resistance.

Tungsten Crucible Types

Depending on the manufacturing process, tungsten crucibles can be classified into different types, as follows:

• Forged Type
• Sintered Type
• Welded Type
• Stamped Type
• Spin-formed Type

Tungsten Crucible Applications

• Rare earth smelting: Tungsten crucibles are commonly used in the smelting process of rare earth metals, capable of withstanding extremely high temperatures to ensure the stability and efficiency of the smelting process.
• Quartz Glass Production: In the melting process of quartz glass, tungsten crucibles are used as the core vessel to withstand high temperatures and reduce contamination of the glass.
• Crystal growth: Tungsten crucibles are widely used in sapphire single-crystal growth furnaces to ensure the quality and success of the crystal growth process.
• Electronic Spraying: In the spraying process of electronic components, tungsten crucibles can withstand high temperatures and harsh chemical environments to ensure the quality of spraying.

Tungsten Crucible Packaging

The Tungsten Crucible is carefully placed in wooden cases or cartons with additional support from soft materials to prevent any shifting during transportation. This packaging method guarantees the integrity of the products throughout the delivery process.