Tungsten Heat Shield For Crystal Furnace

Tungsten crucible for sapphire growth furnace is made of the material of pure tungsten, whose purity is over 99.95%, and the density is about 18.2g/cm3.

Tungsten crucible is used in sapphire growth furnace because of the properties of tungsten, which are high boiling point, high melting point, thigh temperature resistance, high corrosion resistance,low thermal expansion coeffient, and high thermal conductivity. Besides tungsten crucible for sapphire growth furnace, tungsten crucible is also used in metallurgy of rare earth, ion plating and quartz glass.

Tungsten crucible is chosen as one important part in the process of growing sapphire crystal. Under high temperature, tungsten crucible will not react with Al2O3, so that the purity of sapphire crystal can be assured.

Excellent high-temperature performance: Tungsten has an extremely high melting point. It can withstand temperatures up to 2800°C and remains stable in high-temperature environments without easy deformation.

Good thermal reflection: Tungsten plates show outstanding thermal reflection in a vacuum. They can reflect heat radiation back to the working area in the furnace center, reducing heat loss.

Low volatility: Tungsten has very low volatility at high temperatures. This helps maintain a clean furnace environment and minimizes contamination during crystal growth.

Strong creep resistance: Tungsten has excellent high-temperature creep resistance. Even under prolonged high temperatures, it maintains structural integrity.

High purity: High-purity tungsten (above 99.95%) meets the strict requirements for environmental cleanliness in crystal growth.

Crystal Growth: Tungsten heat shields are widely used in crystal growth furnaces, such as sapphire crystal growth furnaces. During sapphire crystal growth, temperature stability and thermal field control are crucial. Tungsten heat shields help manage heat distribution effectively, ensuring a uniform and stable growth environment, which improves crystal quality.

High-Temperature Vacuum Furnaces: In high-temperature vacuum furnaces, tungsten heat shields protect internal components, reduce heat loss, and improve energy efficiency. They also prevent external temperatures from affecting the molten material inside.

Other High-Temperature Applications: Besides crystal growth and vacuum furnaces, tungsten heat shields are also used in other high-temperature and heat-reflective applications, such as optical instruments, providing a stable thermal environment.

FAQ

Are you a factory or manufacturer?

A: Yes, we are a factory but we generally use our trading company to handle the business abroad. It will be more convenient to receive the remittance and arrange the shipment.

What is the delivery method?

A: Generally, we send cargo by UPS, DHL or FedEx. Also, we can send by sea to seaport or by air to the closest airport.

Why is your product so cost-effective?

A: We cut out the middlemen in the end-to-end manufacturing process and we obtain raw material directly from its source.

Do you do spot quality inspection or full inspection?

A: 100% full inspection for sure. All unqualified products are discarded.

How do you ensure your lead time?

A: From material preparation to machining and finally to a full inspection. Every stage of production is strictly monitored and controlled to give you an accurate delivery time.

What is the MOQ of Tungsten Heat Shield For Crystal Furnace?

A: Depends on quantity, generally, no MOQ limit.

How to pay for it?

A: A bank transfer (T/T) will be acceptable.

What is the delivery time?

A: around 7-20 days which depends on the quantity and production.

What is kind of the package?

A: Generally, we use a carton case or plywood case with protective material inside to ensure the save of cargo

What is the lead time?

A: from order placed to cargo receiving will take around 10-25 days.

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