OTF1200XSFB Fluidized Bed Vertical Furnace with 1″ O.D Quartz Tube and Porous Quartz Frit for Powder CVD Applications
The OTF1200XSFB is engineered to facilitate chemical vapor deposition (CVD) processes on powder materials by employing a fluidized bed approach. This furnace is particularly suited for uniform coating of fine particles suspended in a gas stream, enabling efficient interaction between gaseous precursors and solid powders. Its vertical cylindrical heating chamber surrounds a quartz tube designed to optimize gas flow and particle suspension.
Central to its design is a porous quartz frit located in the lower middle section of the heating zone, which evenly distributes the upward gas flow. This flow suspends the powder particles, creating a fluidized bed that ensures excellent heat transfer and uniform coating on each particle. The quartz tube features an enlarged central area to enhance aerodynamic performance and accommodate particle movement.
Key Features
- Vertical cylindrical heating chamber with 1″ O.D quartz tube and 2″ O.D enlarged central section for powder processing.
- Porous quartz frit (15–40 microns, 22 mm O.D x 4 mm thick) provides uniform gas distribution and traps particles within the heating zone.
- Maximum operating temperature of 1100°C with continuous operation up to 1000°C and heating rate up to 20°C/min.
- 1200W power supply compatible with AC 110V or 220V single phase, 50/60 Hz.
- Double-layer steel casing with air cooling and high-purity Al2O3 fibrous insulation for energy efficiency.
- Bottom and top flanges with 1″ diameter, including fittings for primary and secondary gas inlets and exhaust.
- Optional stainless steel tube (SS310) available for high-pressure applications up to 3 bars and 800°C.
Technical Specifications
| Parameter | Specification |
|---|---|
| Heating Zone Length | 200 mm (single zone) |
| Constant Heating Zone | 60 mm (±2°C) |
| Maximum Temperature | 1100°C |
| Continuous Operating Temperature | 1000°C |
| Maximum Heating Rate | ≤ 20°C/min |
| Power | 1200 W |
| Voltage | AC 110V or 220V, Single Phase, 50/60 Hz |
| Tube Material and Size | Quartz tube with 1″ O.D; central enlarged area 2″ O.D (50 mm O.D x 44 mm I.D.) |
| Quartz Frit | Porous quartz, 15–40 microns pore size, 22 mm O.D x 4 mm thick |
| Heating Elements | Fe-Cr-Al alloy doped with Mo |
| Temperature Controller | 30 programmable segments, built-in PID auto-tune, ±1°C accuracy; optional Eurotherm 3000 with ±0.1°C |
| Gas Fittings | 1/4″ tube fittings on both flanges for gas supply |
| Furnace Casing | Double-layer steel with air cooling and Al2O3 fibrous insulation |
Typical Applications
Ideal for chemical vapor deposition on powder substrates requiring uniform coating and precise temperature control. Suitable for research and development in materials science, catalyst preparation, and advanced powder coating processes.
Configuration & Operating Notes
The furnace includes a quartz tube with bottom frit and flanges for gas introduction and exhaust. Operators should carefully adjust gas flow velocity to maintain particle suspension without loss from the chamber. Optional accessories include a stainless steel tube for high-pressure operation, gas mixing systems, oxygen monitoring sensors, ultrasonic atomizers for droplet delivery, and material feeders for continuous processing.
Safety features include over-temperature protection and alarms, allowing unattended operation. The split door design facilitates easy tube installation and maintenance.
