Sapphire dan changjing industrial heating furnace power supply features

1 Sapphire Dan Changjing industrial heating furnace power supply output voltage, power control , high precision, can reach six ten thousandths , enabling 1W adjusted for the stepper unit : Sapphire crystal furnace due to the long process of crystallization and annealing temperature changes very sensitive , high-precision power regulation system controls temperature furnace thermal field become inevitable .

2 Sapphire Dan Changjing industrial furnace heating power , high reliability, long-term continuous operation at full load : Due to adopt Kyropoulos process , single crystal furnace production cycle is long , multi- loop control technology and military power production technology and process reliability , so that reliability of power supply is guaranteed .

3 Sapphire Dan Changjing industrial heating furnace power conversion efficiency can reach above 85% ( rated power ) : the use of phase-shifting rectification technology, IGBT soft switch , reducing the switching losses , in order to achieve high efficiency and low energy consumption.

4 Sapphire Dan Changjing industrial heating furnace power input power factor, the full range of power factor above 0.94 , the fundamental power factor can reach 0.99 . , Grid side harmonic current distortion is small, no more than 21% : No filter reactive power compensation device , reducing equipment cost, and using high-frequency switching PWM rectifier , an increase in the power input phase-shifting transformer 12 pulse rectifier technology to ensure high power factor and low harmonics.

5 Sapphire Dan Changjing industrial furnace heating power modular design flow through the modules in parallel to achieve both power supply requirements : high degree of standardization , maintainability , and can achieve high-volume standardized supporting the production, easy maintenance.

6 . Sapphire Dan Changjing industrial heating furnace power products comply with human safety : safety inspection reports through the body , long-term work in the field on the front line staff: prevent electromagnetic radiation , to prevent the danger of high voltage , while maintaining a good grounding .


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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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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.


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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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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.


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LED application market ups and downs with the sapphire has obvious implications relationship , for now LED sapphire substrate relative surplus has become an indisputable matter real , are you optimistic about the future prospects of industry also remains to be seen . "I take youth gambling tomorrow ", but tomorrow whether they got it ? Investments intended to be launched LED sapphire enterprises should rational view , should not behind closed doors, but already in the " circle " struggle of the enterprise, should also adapt to market demand rather than help in a price war .

Current LED sapphire prices have been at $ 10 a critical point , this is the edge of danger , how to do real response measures to avoid risks for business imperative. In addition , the domestic LED sapphire enterprises although in some ways has almost the same with the international large enterprises , however, the period of transition to work if companies do not , hard skills, the lack of short board will also become apparent. Therefore, rational view of LED sapphire market , business investment justified, there are degrees of market regulation in order to achieve win-win situation .


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Sapphire thermal field is a single crystal alumina, has excellent mechanical, optical, chemical and radiation resistance, it is widely used in optical components and machines mechanical manufacturing and other industries. Currently in the production of blue and white LED substrate material is used mainly to sapphire. As blue-white LED has a long life, low power consumption, high luminous efficiency advantage, so LED lighting has become the mainstream of the future.

Because tungsten, molybdenum material has a high temperature, low pollution and other characteristics, are widely used in the furnace hot zone components Dan Changjing Sapphire, including the crucible, the crucible lid, the heating element, heat shield, support rods, base, etc..

LED sapphire substrate has been reported that the projects under construction production capacity of 101 million / year, is 10 times the demand, people can not help but think, attract enthusiastic local governments tolerant LED sapphire projects and enterprises, the reason , fame and wealth consciousness bear the brunt.

Butterfly Effect The end result is the current price of LED sapphire substrate suddenly fell tangled situation. By the end of 2011, the price of the sapphire substrate has dropped to $ 7 from $ 35, the price decline rate is astounding! Currently, its prices are hovering around $ 10. Most vendors will want to put the third quarter of 2012 or 2013, after the lighting market.


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LED sapphire is a single crystal alumina , also known as corundum . Sapphire crystal has excellent optical properties, mechanical properties and chemical stability, strong high hardness, resistance to erosion, close to 2000 ℃ high temperature in harsh conditions. According to the study suggest that the current can be applied to the LED substrate material only four ( see table I below ) . As an important technique sapphire crystal , has been in the LED industry to form a more mature fashion and applications .

Current international mainstream sapphire crystal growth process are Kyropoulos (KY method ) , Czochralski method (CZ method ) , guided-mode method (EFG method ) , Bridgman and heat exchange method (HEM method ) and so on. Different sizes of chip demand is gradually changing , four -inch wafer demand more prosperous, 6-inch and needs are constantly being applied , but gradually in 2-inch low-end market . As technology and market constraints, relative to the epitaxy, chip and packaging sectors , China's LED industry development has been lagging behind the substrate . In recent years , however , at a higher profit driven industry , LED sapphire in China 's rapid development of the fire people anticipated . 2010 , with the Republic of Korea , Taiwan and mainland China as well as domestic heat sapphire upstream investment areas MOCVD epitaxial soaring orders triggered China 's investment boom LED sapphire , local government or corporate capital intensity of staggering , and therefore rewrite the Chinese LED sapphire short legs weak condition .


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