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Riveting Molybdenum Products Heater Thermal Field For Sapphire Crystal Growth Furnace Molybdenum Heating Elements

Place of Origin China
Brand Name PRM
Certification ISO9001
Model Number custom
Minimum Order Quantity 1pc
Price $300~1500/pc
Packaging Details plywood case
Delivery Time 15~20 work days
Payment Terms T/T
Supply Ability 2000kgs/month

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Product Details
Features Low Thermal Conductivity Name Molybdenum Thermal Field For Sapphire Crystal Growth Furnace
Material Molybdenum And Molybdenum Lanthanum Alloy Size As Per Customer's Drawing
Use Temperture 1100~1800℃ Crafte Riveting
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Product Description

Furnace For Sapphire Crystal Growth With A Molybdenum Thermal Field

 
1. An explanation of the molybdenum thermal field used in the furnace to grow sapphire crystals:
 
Parts of vacuum furnaces can also be insulated using graphite and molybdenum metal. The heat shield in an all-metal thermal field is made up of several layers of metal plates, with a specific amount of space between each layer.
 
In a standard vacuum furnace with a working temperature of 1315°C, the heat shield is usually composed of two layers of molybdenum sheets on the inside and three layers of stainless steel sheets on the outside.The quantity of molybdenum sheets and the thickness of each layer must be increased if greater operating temperatures are necessary. Molybdenum sheet can be substituted with tantalum sheet if the operating temperature is higher than 1650 °C. The number of layers and the distance between the metal sheets determine the thermal insulation performance for an all-metal thermal field. These distances are utilized to stop heat from conducting and radiating outside the thermal field's core. The thermal radiation released from the thermal field's center is reflected back to the workpiece there as a result of the molybdenum sheet's reflecting qualities. In locations where there is a need for extreme cleanliness and vacuum, all-metal thermal fields are frequently used. It should be noted that for the all-metal thermal field, embrittlement of the molybdenum metal will occur at 1150°C due to the metal's recrystallization, and the embrittled metal heat shield is easily damaged by the fixture or workpiece that falls on the screen. The cost of all-metal thermal fields is frequently more expensive than those built of other materials due to the high cost of molybdenum metal.
 
2. Molybdenum Thermal Field For Sapphire Crystal Growth Furnace Measurements and Tolerances:

 

Unit:mm

produced with a single sheet of molybdenumproduced by a sheet of several molybdenum
thicknessMax cylinder diameterMax cylinder height
2.0±0.1450±2660±1 
1.0±0.08610±2660±1Manufacture according to customers’
0.5±0.04700±2660±1requirements
0.3±0.03700±2660±1 

 

According to the needs of the customer, special sizes can be produced.

 

Riveting Molybdenum Products Heater Thermal Field For Sapphire Crystal Growth Furnace Molybdenum Heating Elements 0Riveting Molybdenum Products Heater Thermal Field For Sapphire Crystal Growth Furnace Molybdenum Heating Elements 1

 

3. The Molybdenum Thermal Field For Sapphire Crystal Growth Furnace's manufacturing procedure and apparatus:

 

ItemProcessEquipmentQuality check point
1Mo sheet 

1  Physical and chemical properties

2 Measurements (length ,width)

2Check 3 Surface quality
3Wound rollRotary machine1 Surface clearness
4Check 2 Diameter and height of cylinder
5Drilling, rivetDrill press1 Rivet secure
6CleanRiveting machine2 Location of assembling hole
7Check  
8AssemblyAssembly platform1 Surface clearness
9Clean 2 The diameter and height of cylinder conforming to the
10Check requirements
11Package 

3  Solid assembly, and no splice among layers

4 Show certificate of quality

 
4. Utilization of a Molybdenum Thermal Field in a Furnace for Growing Sapphire Crystals:
 
The most important role of the molybdenum reflection shield is to prevent and reflect the heat in the sapphire growing furnace as one of the heat-shielding components. Enhancing the crystal-pulling requires heat-shield components with high density, precise measurement, smooth surface, easy assembly, and acceptable design.
 
Vacuum furnaces, etc., can also use molybdenum thermal fields to heat insulation and reflect heat.
 
 
 


 
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