OTF-1200X-4-C4-SL is a special dual-tube CVD system designed for coating thin film on the metal foil, especially for preparing flexible electrodes on metallic foil on new generation energy research. Fast heating and cooling can be achieved by sliding the furnace. Please refer to the Operations Instructions section to see the operations of the furnace:

A dual quartz tube:100mm Dia. exterior tube and suspended by 80 mm Dia. interior tube. Metallic foil (Graphene Growth Substrate) will be wrapped around the inside tube surface for CVD reaction.
The flanges for the dual tube, allow reactive gasses to flow between two tubes (10mm space), and the inert gas flow inside the tube for cooling.
4 gas channels controlled by 4 separate digital MFCs
The vacuum pump is included with a KF25 adapter and pipe for plug and play
A sliding rail is installed on the bottom of the furnace, which allows for fast heating or cooling by sliding the furnace from one side to the other side.
One slide-stopping clamp is included for holding the position of the furnace.

Both the heating zone and vacuum system are selectable: Single or dual heating zone; High-Speed Oilless Dry Vacuum Pump - VBS-M1 or Two-Stage Mechanical Pump - VBS-ACP15.

SPECIFICATIONS:

Furnace Structure

Single heating zone

Dual 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.
The 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 the tube surface for the CVD reaction
Heating zone length: 440mm
Constant temperature heating zone length: 120 mm (±1°C)

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 are controlled separately: Dual-direction sliding rails to ensure the furnace moves smoothly.
200mm length for each heating zone, 400mm total heating length
250mm constant temperature zone if the two zones heating at the same temperature
500°C max temperature difference if place a thermal block in between two-zone

Power
10 feet power cable with no plug (ask a licensed electrician to do the plug)

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)

Heating Temperature

Max. Temperature: 1100°C
Continuous Temperature: 1000°C

Heating & Cooling Rate

Max. heating and cooling rates depend on working temperature. Please click on the tables below to see Max. heating & cooling rate varies at different temperatures range.
(You shall calibrate temperature and heating cooling rate at your working condition before use)

Heating plot

Cooling plot

Fused Quartz Tubes

High-purity quartz tube: 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)

Vacuum Flanges

Using dual-tube for inducing CVD growth on metal foil (wrapped around interior tube surface):

Please click for a related article: "Roll-to-roll production of 30-inch graphene films for transparent electrodes"

1-1. Shown below, one pair of SS304 flanges to seal both the outside tube and 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 the inside tube open for gas cooling.


Left Flange		Right Flange

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 allow for operation without any attendant.
Over-temperature protection and alarm allow for operation without attendant(s).
+/- 1°C 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. Click for detailed information about the MTS02-Y software kit.
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 the Eurotherm 3504 temperature controller.

Mass Flow Meters & Gas Mixing Station

4 precision mass flow controllers (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 the bottom case
Each gas channel has a stainless steel needle valve for easy on/off
The flow rate is adjustable from the MFC panel

Vacuum Pump Station and valves

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 m-bar vacuum can be achieved inside the processing tube
A digital vacuum gauge (made in the USA) is installed on the left side flange. Please click the second picture below for more details
For vacuum level to 10^-5 torr, please order below mobile turbopump

Water Cooling Function

Graphene and 2D Materials Research

1200°C Max. Automatic Sliding Dual Furnace (Ø50mm) for TMDs Growth - OTF-1200X-50-DFSL

1200C Tube Furnace with Internal Travel Mechanism For HPCVD - OTF-1200X-S-HPCVD

1200C Tube Furnace w/ Internal Sample Sliding by Magnet for DVD & RTP - OTF-1200X-S-DVD

Dual Tube (100/80 mm) CVD Sliding Furnace w/ 4 Ch Gas & Vacuum System - OTF-1200X-4-C4-SL-UL