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1700C Bridgman Furnace for Directional Solidification of Polycrystalline Ingots - EQ-SKJ-BG1650-LD

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Item Number: SKJ1650BG

EQ-SKJ-BG1650 is a 1650°C max. Bridgman furnace for directional solidification of Polycrystalline Ingots up to 37mm diameter. Three individual controlled heating modules & speed adjustable cooling fans at furnace exit provide advantages to creating larger temp. the gradient at the melt/crystal interface as needed. An automatic crucible retrieving system enables the most convenient way for sample loading/unloading. The optional crucible rotation stage can be added at additional cost for single crystal ingot growth. 

Basic Specifications:

Advanced Features

  • Three stacked heating modules with independent temperature measurement and control enable the flexibility of creating various temperature gradients along the length of the heated area;
  • Two-speed adjustable cooling fans with TC at the exit of the furnace allow better control over the temperature gradient at the melt/crystal interface; 
  • φ42mm Alumina sample pulling stage with TC attachment for accurate temperature monitoring of the crucible on top and generate instant temperature plot;
  • Electric elevated crucible stage enables an automatic and convenient sample loading / retrieving;
Power Requirements
  • 220VAC single phase 50/60Hz
  • 9.5KW
Working Temperature 
  • Heating Element: Silicon molybdenum rod
  • Max. Working Temperature: 1700°C ( <1hr)
  • Continuous Operating Temperature: 1600°C
 Processing Tube & Flange
  • High purity alumina furnace tube, Size: φ80mm O.D. x 74 mm ID x 1000mm L
  • A pair of stainless steel flange is connected to both end of the processing tube which allows for inert gas purging or vacuum during the crystal growing process
Sample Stage
  • φ42X40mm H Alumina Sample Stage
  • B type thermocouple insert from the bottom of the sample stage for accurate temperature measurement of the crucible
Crucible Retrieving Mechanism
  • Automatic sample retrieving system for easy crucible loading/unloading, 
  • 700mm max. travel distance
 Heating Zones
  • Three heating zones with independent temperature measurement and control
    • Three zones: 300mm (12") long in total, please click bottom left picture for more size info;
    • 100mm long for each zone, please click bottom right picture for more size info;
Temperature Control
  • Three PID temp. controller with 30 programmable segments for precise control of heating, cooling rate and dwell time.
  • Built-in overheating & broken thermocouple protection.
  • European Temperature controller, with +/- 0.1 ºC temperature accuracy.
  • Three B type thermocouples (one for each zone).
Cooling Fans One speed adjustable cooling fans are installed at the bottom exit of the furnace
 Furnace Travel Distance & Speed
  • As the furnace heater moves upward, the crucible is moving toward the bottom exit of the furnace where the lower temperature is seen. 
  • The maximum travel distance of the furnace heater is 200 mm. 
  • Travel speed: 0.03-3 mm/hr
 Vacuum Pump (Not included)
  • 10E-2 torr via dual-stage mechanical vacuum pump (bottom right picture)
  • 10E-5 torr via Turbopump (bottom left picture) 
  • The vacuum pump is optional. Please click here to choose a vacuum pump. 
  • For oxygen-sensitive material, suggest using recirculating gas purification system ( < 1 ppm) to replace turbopump (Pic. 3 - 4) 
  •  Pic. 1    Pic. 2  Pic. 3    Pic. 4
 Compliance &
  • CE certified
  • NRTL or CSA certification is available upon request at the extra cost.
  • One year limited warranty
Controller stage: 860mm L x 600mm W x 1220mm H
Furnace stage: 1170mm L X 910mm W X 2500mm H
Shipping Weight & Dimensions
  • 1) 3225 lbs, 83x48x86"
  • 2) 751 lbs, 49x41x58"
Installation Video         
Optional & Related Products
  • For single crystal growth, the rotation of the crucible stage is needed, an additional cost will apply. Please contact our engineering team for more information.
  • A board selection of crucible materials: Boron Nitride; Alumina; Zirconia; Graphite....
        Alumina      Boron Nitride  Graphite CrucibleGraphite   Zirconia           
  • Grown crystal boules:   Al, Ag, Au, Cu, Mg, Ni 

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