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Hybrid Crystal Grower For Both CZ & Bridgman up to 1700ºC w/ Atmosphere Control - OTF-1700X-PVT

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Item Number: OTF-1700X-PVT
OTF-1700X-PVT is designed for growing SnO2 single crystal by PVT methods ( Physical Vapor Transport) under a controlled atmosphere up to 1700oC at an affordable cost.  It also can be used to grow the crystal by the Bridgman method via pulling a crucible.

Vertical Tube Furnace

  • Heating zone length: 200mm
  • Constant temperature zone: 70mm within +/-1ºC
  • 50 mm dia alumina tube with vacuum-sealed rotation and pulling mechanism.
  • MoSi2 heating elements with Max. 1700°C working temperature
  • Eurotherm temperature controller with +/- 0.1 ºC accuracy.
  • Voltage: 110V or 208-240 VAC, single phase, 50/60Hz
  • Power: up to 4 kW 
Alumina Tube and Flanges

  • High purity alumina Tube size:  50mm OD x 40 mm ID x 1000 mm L
  • Top flange: water-cooled flange with a needle valve and a KF25 port for rotation and pulling mechanism.
  • Bottom flange: flange with a needle valve and KF25 port for connection to a vacuum pump.
  • Two 1/4" tube fitting for gas circulation or flow. 
  • Working gases:    Inert gas, CO2, and oxygen gas up to 0.2 MPa.
Pulling Mechanism 
  • Travel is driven by precision servo motor
  • Pulling Speed: 0.1 - 10 mm/hr.
  • Pulling Rod Rotation Speed: 0.1 - 23 RPM
  • Travel distance: 0 - 300 mm
  • Faster travel: 35 mm/min
CZ Method
  • Source raw materials will be put in the bottom flange with an included alumina rod.
  • The seed crystal ( substrate ) will be fixed in the pulling rod on the top flange.
  • The seed crystal  will keep a constant distance from the crucible, and slowly move up with crystal growth during heating
  • Inert gas or CO2 gas will be filled in the processing tune during crystal growth up to 2 bar pressure.
Bridgeman Method
  • The source material will be put in a crucible with V type bottom with a crystal seed.
  • The crucible will be hung upon the pulling rod on the top flange 
  • The crucible will rotate and move up during heating to grow a single crystal
Temperature Control and Profile
  • Two Eurotherm temperature controllers with two K-type thermocouples are builtin with +/- 0.1ºC accuracy.
  • 28 segments programmable with PID adjustable for two heating zone independently.
  • RS485 port and software (iTools) is ready for PC remote control
  •  Note: It is the customer's responsibility to create a suitable thermal gradient for crystal growth.
Vacuum Pump
Gas Purification System
  • 10E-2 torr via dual-stage mechanical vacuum pump (Pic. 2)
  • 10E-5 torr via Turbopump (Pic. 1) 
  • The vacuum pump is optional. Please click here to choose a vacuum pump. 
  • For oxygen-sensitive material, suggest using a recirculating gas purification system ( H2O, O2 < 1 ppm) to replace the turbopump (Pic. 3) 
  •  Pic. 1     Pic. 2    Pic. 3

Water Chiller

  • A water chiller is required to prevent top flange overheating but it is not included in the standard package. 

Dimension & Weight 
  • Weight:    105 kg
  • Size:     L×W×H: 860 mm×740 mm×2160 mm
  • NRTL certification is available upon request
  • One-year limited warranty and lifetime technical support
Demo Video

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