Products Description
Tungsten Heat Shield for Crystal Furnace is generally considered for furnaces with temperatures above 1100 degrees Celsius (including side screens and upper and lower cover screens). As insulation components in the furnace, the key role of molybdenum and tungsten reflection screens and upper and lower cover plates is to block and reflect the heat inside the furnace.
Tungsten/Wolfram heat shield is to keep the temperature inside of tungsten crucible and prevent outside people from hurt. Tungsten heat shield is made of tungsten sheet with purity over 99.95%. The production process of tungsten heat shield in the sapphire growth furnaces is using tungsten powder by hydrostatic compaction and sintered at high temperature. Tungsten heat shield used in sapphire growth furnaces can be made by hot rolled and cold rolled.
The production process of tungsten heat shield in the sapphire growth furnaces is using tungsten powder by hydrostatic compaction and sintered at high temperature to prepare ungrounded tungsten plate. Besides using in sapphire growth furnace, tungsten sheet can also used in vacuum parts of the electric light, and vacuum coating containers.
Tungsten heat shield provides good heat shield use for the application of sapphire crystal growth furnace.
features
Excellent High-Temperature Performance: Tungsten has a very high melting point of 3420°C. It also has good strength and hardness at high temperatures. In hot environments, tungsten heat shields stay stable and hardly deform. They also have very low volatility.
Good Thermal Reflectivity: After high-temperature rolling, tungsten plates become very dense, close to their ideal density. With proper treatment, their surface can become almost mirror-like. In a vacuum, this kind of surface provides excellent heat reflection.
Strong Oxidation Resistance: Tungsten resists oxidation well below 500°C. So, in dry conditions, tungsten heat shields can withstand oxidation effectively.
High Purity: Tungsten heat shields usually have a purity of 99.95% or higher. This helps reduce the impact of impurities on high-temperature processes like crystal growth.
Customization Service: We can make tungsten heat shields in different shapes and sizes to meet specific customer needs.
applications
Crystal Growth Furnace:
In sapphire crystal growth, temperature stability and heat distribution are crucial. Tungsten heat shields are widely used because they have a high melting point, stable performance at high temperatures, and low contamination risk. Their heat-reflective properties help optimize heat distribution and control axial and radial temperature gradients, improving crystal quality.
High-Temperature Vacuum Furnace:
Tungsten heat shields work well in high and ultra-high vacuum environments. Due to their low specific heat capacity, the furnace can heat up and cool down quickly. They also reduce heat loss and improve energy efficiency in high-temperature vacuum furnaces.
Specification
|
Tungsten Cover Plates |
Tungsten Heat Shield/ Single sheet |
|||
|
Sheet Thickness |
Dia (Max) |
Sheet Thickness |
Dia(Max) |
Height(Max) |
|
2.0±0.1 |
660±0.2 |
2.0±0.1 |
450±2 |
660±1 |
|
1.0±0.08 |
660±0.2 |
1.0±0.08 |
610±2 |
660±1 |
|
0.5±0.04 |
660±0.2 |
0.5±0.04 |
700±2 |
660±1 |
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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