Tungsten Heat Shield

What is Tungsten heat shield?

Tungsten/Wolfram heat shield is to keep the temperature inside of tungsten crucible and prevent outside people from being hurt. Tungsten heat shield is made of tungsten sheet with a purity of over 99.95%. The production process of tungsten heat shields in the sapphire growth furnaces uses tungsten powder by hydrostatic compaction and sintered at high temperatures. Tungsten heat shield used in sapphire growth furnaces can be made by hot rolling and cold rolling.

Application

Tungsten/Wolfram heat shields are mainly used as a material of construction in specific areas of vacuum furnace hot zones. A maximum operating temperature of 2400°C  can be achieved. As the heat-shield parts in the sapphire growth furnace, the most decisive function of the upper and bottom cover plates is to prevent and reflect the heat in the furnace. Heat-shield parts with high density, exact measurement, smooth surface, convenient assembly, and reasonable design have great significance in improving crystal-pulling.

Advantage

· High melting point, 3420ºC (6187ºF)

· Low vapor pressure

· High hot strength

· Low thermal expansion

· High thermal conductivity

· High Young’s modulus

· High corrosion resistance against acids and molten metals

· Recrystallization temperature, between 1100º – 1400ºC (2012º – 2550ºF)

· Good electrical conductivity

· High modulus of elasticity

Regular Specs

We can supply tungsten needles as per customers' requests. As an experienced supplier,  we can supply high-quality tungsten heat shields at competitive prices.

If there are any other specs, please contact us with no hesitation!

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