Sapphire crystal furnace of tungsten, molybdenum, rhenium, tungsten rhenium alloy wire products by doping element rhenium wire to improve the toughness of brittle transition temperature decrease , increase the recrystallization temperature and resistance creep. Sapphire crystal furnace of tungsten, molybdenum, rhenium products can be used at high temperatures in an inert environment bundled tungsten heater element and seed rods, sapphire crystal furnace of tungsten, molybdenum, rhenium, tungsten rhenium wire products commonly used model is the diameter of 0.5 mm tungsten rhenium 25 of its containing 25% rhenium . Tungsten containing 25% rhenium alloy , tungsten, rhenium and workability becomes more ductile . Tungsten- rhenium wire has good electrical properties, can be used as high temperature thermocouple wire .

The melting point of tungsten- rhenium wire 3120-3360 ℃, the highest you can use to 3000 ℃. Tungsten- rhenium wire has high thermoelectric power , high sensitivity, does not dissolve in acid and other characteristics of any individual , tungsten rhenium wire abundant raw materials in China , cheap, etc. . In some high reliability is required to prevent the electric light filament breakage products often referred to as doped tungsten rhenium tungsten rhenium added wire, tungsten rhenium wire can extend tungsten brittle transition temperature down to room temperature or below . Tungsten- rhenium wire is brittle tungsten can be extended , even at a lower temperature is room temperature or lower temperature .

Tungsten- rhenium wire in addition to 26% Re this frequently used mainly for tungsten rhenium alloy thermocouple material , tungsten rhenium thermocouples main strengths in: a fast response . 2 , wide temperature range up to 2500 ℃. But is generally used in an inert atmosphere or a reducing atmosphere , or need to add protective casing , usually molybdenum alloy casing !


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Each LED is born in a tungsten crucible.

In this crucible, then melted to form a single crystal alumina sapphire crystal . Since the methods used are inconsistent, so in general the process takes two to three weeks . The first single crystal sapphire single crystal growth process material is heated to more than 2,000 degrees Celsius , and then slowly cooled in a controlled environment . Only a few materials can be used to produce the crucible , it is because they must meet two requirements :

On the one hand , they must be of high temperature materials .

On the other hand , they must not pollute the melted sapphire . In addition , the crucible must be heated by a high furnace , which can produce the desired high temperature, and can accurately control and cooling. Sapphire melting furnace core , the so-called thermal field , designed precisely to each customer's needs in order to facilitate manufacture of high-performance materials .


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Assembled sapphire crystal furnace heating element shaped like a bird cage , often called fever cage . Sapphire crystal furnace tungsten and molybdenum products, tungsten rhenium sapphire crystal furnace heating element electric components work is to convert electrical energy into heat energy. Sapphire crystal furnace tungsten and molybdenum products, tungsten rhenium furnace heating element to provide uniform and stable controllable heat. Tungsten heating element product specifications are minimum cage height max 1000 200 , tungsten rod diameter max 10 min 3 . Sapphire crystal furnace tungsten and molybdenum products, tungsten heating element rhenium copper electrode is the main content of 99.9% , sapphire crystal furnace tungsten and molybdenum products, tungsten rhenium tungsten rod heating elements and tungsten copper electrode heating element as the main content is 99.9% .

Sapphire crystal furnace tungsten and molybdenum products, tungsten heating element rhenium tungsten rod density of not less than 19.0 , sapphire crystal furnace tungsten and molybdenum products, tungsten heating element rhenium product tolerances cage body and the outer diameter of the copper electrode ± 0.2. Sapphire crystal furnace tungsten and molybdenum products, tungsten heating element rhenium copper electrode height of ± 0.5, the height of the cage body ± 2.0. Sapphire crystal furnace tungsten and molybdenum products, tungsten rhenium heating element rod diameter ± 0.2, tungsten rod bent state surface condition can be forged , polished state suppliers.


Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
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Conducting electrode ( go hydro pole, crystal growth furnace main conductor ) Sapphire Dan Changjing is an important component of the vacuum furnace is one of the heating furnace and the furnace thermal field power connections only channel ; thermal field in the furnace and ( Birdcage ) direct overlap , extending to the conductive pillars outside the furnace through the conductive clip, soft connection with the power supply cabinet connections.
The component structure is complex, high precision machining difficult, mainly reflected as follows :

( 1 ) The combination of conductive column with lid :

Conductive electrode is placed in a vacuum furnace Sapphire Dan Changjing , to pass through the lid connected to external power , so between the electrodes 4 conductive column extremely strict tolerance requirements , needs and lid on the four holes exactly the same distance . If the error can not be assembled .

( 2 ) electrically conductive electrode in the process of the problem of deformation :

Electrode is made of copper raw materials processing, from raw material to finished product, to go through a lot of road cumbersome process , each process will produce stress , it is easily deformed. Especially during the final welding process, because the heat generated by the welding process causes stress release , the workpiece is very likely to cause serious distortion, finishing all tolerances are affected , and can not be restored to re- adjust .

( 3 ) Motor cooling water walking water seal :

Capacity is far greater than the closure of the electrode conductivity requirements, it will not heat conductive electrode itself , but despite vacuum crystal growth furnace thermal insulation , but still have a high temperature conductivity to the electrode . Heating wire heating thermal field through the conductive ring will direct the heat to the electrodes. Therefore, the electrode must be cooled with water to ensure the normal operation of the electrode , vacuum crystal growth furnace is a high temperature and high vacuum work environment in order to effectively grow crystals. So the main body of the electrode and the conductive pillar , walking tank closure plate hole plug part of the welding process have very strict requirements. Neither reduced conductivity due to welding , and must not have any slight leakage, or fail to achieve vacuum requirements, not grow crystals.


Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com;sales@xiamentungsten.com
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