Creuset en tungstène

Tungsten Crucible Stock Dimensions

Diameter（mm）		Mur Thickness（mm）		Height（mm）		Roughness
Diamètre	Tolerance	Mur Épaisseur	Tolerance	Hauteur	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 Crucible Properties

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

Tungsten Crucible Production Process

• Matières premières: Sélectionnez des produits de haute pureté tungsten powder.
• Métallurgie des poudres: High-purity tungsten powder is mixed, pressed, and molded into the preliminary shape of the crucible. common methods include isostatic pressing and die pressing.
• Frittage: 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.
• Traitement de surface: 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.