Crucible Liner Tungsten

1. Product name: Crucible liner tungsten

Crucible liner tungsten is one of the metal tungsten products, mainly divided into sintering molding (applied to powder metallurgy technology), stamping molding, and spinning. The tungsten rod is turned and formed (generally smaller in size), and there are many kinds of welding forming. It is made of a pure tungsten plate, tungsten sheet, and pure tungsten rod through the corresponding process. Crucible liner tungsten can be used in vacuum inert gas below 2600 degrees. Tungsten has a high melting point and boiling point, good high-temperature strength, wear resistance and corrosion resistance, high thermal conductivity, small thermal expansion coefficient, and good hardenability. Crucible liner tungsten is widely used in rare earth smelting, quartz glass, electronic spraying, crystal growth, and other industries.

2. Introduction of crucible liner tungsten

Tungsten has a high melting point and boiling point, good high-temperature strength, anti-friction and corrosion resistance, high thermal conductivity, small thermal expansion coefficient, and good hardenability. Thanks to such excellent characteristics, crucible liner tungstens are widely used in rare earth smelting, quartz glass, electronic spraying, crystal growth, and other industries.

3. Physical and chemical properties

1) purity： W≥99.95%；

2) Density ：≥18.5g/cm3；

3) Maximum operating temperature：2400℃。

4. Classification of Crucible liner tungsten

Tungsten forging crucible

Sintered tungsten crucible

5. Production Process of Crucible liner tungsten

Tungsten powder -- sieving -- batching -- isostatic pressing -- rough turning processing -- intermediate frequency sintering -- fine turning processing -- packaging.

6. Application of crucible liner tungsten

Since the melting point of tungsten is as high as 3410 °C, crucible liner tungsten are widely used in core containers in industrial furnaces such as sapphire single crystal growth furnaces, and quartz glass melting furnaces, and rare earth smelting furnaces. The working temperature environment used is generally above 2000 °C. Crucible liner tungsten featuring high purity, high density, no internal cracks, precise dimensions, and smooth inner and outer walls play key roles in the seeding success rate, crystal pulling quality control, decrystallization and sticking, and service life in the process of sapphire crystal growth. 

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