Furnace Structure
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Single heating zone
- High purity Al2O3 insulation chamber guarantees excellent temperature uniformity.
- Cooling fans are installed at the bottom of the furnace to ensure efficient ventilation.
- Sliding flange assembly is made of stainless steel.
- Dual quartz tube:100mm Dia. exterior tube and suspended by 80 mm Dia. interior tube. Metallic foil (Graphene Growth Substrate) will be wrapped around inside tube surface for CVD reaction
- Heating zone length: 440mm
Constant temperature heating zone length: 120 (±1°C) @400~1100°C
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Dual heating zone
- High purity Al2O3 insulation chamber ensures excellent temperature uniformity.
- Cooling fans are installed at the bottom of the furnace to ensure efficient ventilation.
- Max. Temperature: 1200°C and continuous temperature: 1100°C.
- Two Heating Zones controlled separately:
Dual direction sliding rails to ensure furnace moves smoothly.
- 200mm length for each heating zone, 400mm total heating length
- 250mm constant temperature zone if the two zones heating at same temperature
- 500oC max temperature difference if place a thermal block in between two zone
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Power |
Single heating zone
Power: 208-240VAC, 50/60Hz, single phase, 2.5KW ( 20A Breaker required) |
Dual heating zone Power: 208-240VAC, 50/60Hz, single phase, 4 KW ( 50A Breaker required) 10 feet power cable with no plug (ask a licensed electrician to do the plug) |
Heating Temperature |
- Max. Temperature: 1100°C
- Continuous Temperature: 1000°C
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Heating & Cooling Rate |
Max. heating and cooling rates depend on working temperature. Please click on tables below to see the Max. heating & cooling rate varies at different temperature range.
( You shall calibrate temperature and heating cooling rate at your working condition before use )
Heating plot Cooling plot
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Fused Quartz Tubes |
Two pairs of vacuum sealed flanges with water cooling jackets and stainless steel needle valves
- Outside tube EQ-QZTube-101D-1400: OD:4"x ID: 3.8" X 55" Length (OD 100 x ID 96 x 1400 mm )
- Inside tube EQ-QZTube-80D-1800: OD:3.15: x ID x 2.95" x 70.8" Length (OD 80 x ID 75 x 1800 mm
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Vacuum Flanges |
Using dual tube for inducing CVD growth on metal foil (wrapped around interior tube surface):
- 1-1. Shown below, one pair of SS304 flanges to seal both the outside tube and the space between the outside tube and inside the tube (this space is considered as a reaction chamber).
- Left side flange: Barb fitting with needle valve as gas inlet, a digital vacuum gauge with measuring range 10^-4 to 1000 torr, water cooling inlet/outlet included
- Right side flange: Right angle valve with KF25 flange fitting, a vacuum release needle valve, water cooling inlet/outlet included
- 1-2. Leave both ends of inside tube open for gas cooling.
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Ultimate vacuum pressure: 10^-2 torr (by mechanical pump)
10^-5 torr (by turbo molecular pump) |
Temperature Controller |
- PID automatic control with 30 programmable segments for precise control of heating rate, cooling rate and dwell time.
- Built-in over temperature alarm and protection allows for operation without any attendant.
- Over temperature protection and alarm allows for operation without attendant(s).
- +/- 1 ºC temperature accuracy.
- RS485 Communications Port.
- Advanced Temperature Control (Optional)
- MTS02-Y Temperature control software kit (for YD518P series controllers) + 15" laptop package is available at the options bar. You may upgrade the temperature controller to the Eurotherm 3504 Temperature Controller which is fully compatible with LabVIEW. This package includes a Eurotherm 3504 programmer, a communication cable (RS485 - USB) and a software CD. Click the pic below to view the full spec of Eurotherm 3504 temperature controller.
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Mass Flow Meters & Gas Mixing Station
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- 4 precision mass flow controller ( MFC) with digital display and adjusting knob are installed on the left bottom case to control gas flow rate:
- 4 Gas channels (contact MTI sales if need more)
- MFC 1: Control range from 0~100 SCCM
- MFC 2: Control range from 0~200 SCCM
- MFC 3: Control range from 0~200 SCCM
- MFC 4: Control range from 0~500 SCCM
- Flowing rate accuracy: ±1% FS
- Gas inlet and outlet: 1/4" Swagelok tube connector
- One 80mL gas mixing tank is installed in bottom case
- Each gas channel has a stainless steel needle valve for easy on/off
- The flow rate is adjustable from the MFC panel
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Vacuum Pump Station and valves |
Optional 1:
- Pfeiffer's High Speed (226L/min) Oilless Dry Vacuum Pump, 10E-3 Torr Limit is installed inside a heavy duty mobile cart. Please click the picture below for more details.
- KFD25 adapter and stainless steel pipe are connected between pump and tube flange with a precision ball valve.
- 10E-2 Torr vacuum can be achieved inside processing tube
- Digital vacuum gauge (made in the USA) is installed on the left side flange.
- (Optional) For higher vacuum level to 10^-5 torr, please order below mobile turbo pump.
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Optional 2:
- The heavy duty Double Step Rotary Vane Vacuum Pump with Exhaust Filter & KF-D25 Inlet is installed inside a heavy duty mobile cart. Please click the picture below for more details.
- 6.7x10-4 mbar vacuum can be achieved inside processing tube
- Digital vacuum gauge (made in the USA) is installed on the left side flange. Please click the second picture below for more details
- For higher vacuum level to 10^-5 torr, please order below mobile turbopump at extra cost:
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Water Cooling Function |
Water cooling on the flange is mainly for cooling down the o-ring inside the flange to ensure the best-sealed chamber at high temperature:
- Water cooling flanges require >= 10L/M water flow.
- You may use tap water as the coolant, but we strongly suggest you to use a recirculating water chiller for environmental considerations. Please click thumb below to order the water chiller at extra cost.
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Optional Parts (building up a single tube furnace) |
You can build up an 80mm Dia. single tube reaction chamber by ordering extra sealing flanges and install them onto interior tube:
- Left side flange: Barb fitting with needle valve as gas inlet and 1/4'' feedthrough fitting for customer to insert a measuring sensor
- Right side flange: KF25 fitting with mechanical gauge and vacuum release valve
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Dimension |
- Furnace: 550 x 380 x 520mm
- Bottom mobile case x 2: 600 x 600 x 600mm (one for gas mixing station and the other for vacuum pump)
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Shipping |
- Shipping Weight: ~800 lb
- Shipping by freight with three pallets
- Crating fee will be applied
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Warranty |
One year limited manufacturer's warranty (Consumable parts such as processing tubes, O-rings, and heating elements are not covered by the warranty, please order replacements at related products below). |
Laptop, software & WiFi Control (Optional) |
- Brand new laptop with Microsoft Window 10 and Microsoft Office 2013 (30 days free trial) for immediate use.
- Labview Based Temperature Control System enables user to edit temperature profile, manage heat-treatment recipe, record and plot data for MTI furnaces.
- A wireless remote control provides up to 300 meters operating range.
- Above features are available upon request at an extra cost (up to $1,000). Please contact us for more information.
- Note:
The software is only compatible with MTI's Yudian Temperature Controller
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Compliance |
- CE Certified
- All electric components ( >24V) are UL / MET / CSA certified
- The furnace is ready to pass TUV(UL61010) or CSA certification at extra cost.
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Application Notes
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- Tube furnaces with quartz tubes are designed for using under vacuum and low pressure < 0.2 bars / 3 psi / 0.02 Mpa
- Attention: A two-stage pressure regulator must be installed on the gas cylinder to limit the pressure to below 3 PSI for safe operation.
- The flow rate for gasses should be limited to < 200 SCCM (or 200 ml/min) for reducing thermal shocks to the tube
- Vacuum limit definition for all quartz tube furnaces: * Vacuum pressures may only be safely used up to 1000°C
- Click here to learn How to set up quartz/ ceramic tube and vacuum flange for MTI Tube furnace.
- One slide stopping clamp is included for holding the position of the furnace.
- After CVD, the graphene must be transferred from the metal catalyst to another substrate for most applications. By using the graphene transfer tape, the residue can be low.
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Warning |
- Fast sample cooling can be achieved by sliding the heating chamber away. Please wear protective gears such as heat resistant suit & gloves if you intend to do so.
- DO NOT TOUCH THE TUBE SURFACE WHEN IT IS HOT!
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