OTF-1500X-III-R60-AF Three-Zone Rotary Tube Furnace with Automatic Feeding and Receiving System
The OTF-1500X-III-R60-AF is engineered for precise thermal processing of inorganic compounds and battery materials, particularly suited for continuous chemical vapor deposition (CVD) powder synthesis. Its design facilitates uniform calcination and coating of lithium-ion battery cathode materials such as LiFePO3 and LiMnNiO3, as well as rotary CVD for silicon/carbon anode materials. The system supports continuous operation with controlled atmosphere and temperature uniformity.
This rotary tube furnace integrates an automatic powder feeding mechanism mounted on a tiltable furnace, ensuring consistent material distribution inside the rotating alumina tube without disturbing the controlled atmosphere. The receiving tank collects the processed powder in an airtight environment, preventing exposure to air and contamination. The furnace features three independently controlled heating zones totaling 600 mm in length, maintaining temperature stability within ±1°C in the constant zone.
Key Features
- Three heating zones with 24 silicon carbide rod elements rated for up to 1500°C peak temperature.
- Variable rotation speed of the alumina tube from 0 to 10 RPM driven by a DC gear motor.
- Tiltable furnace design allowing up to 20° tilt for operational flexibility and faster cooling.
- Automatic powder feeder with adjustable feed rate up to 97 cm³/min and airtight swivel assembly.
- Stainless steel receiving tank (2 L capacity) for collecting fired powder without air exposure.
- High purity alumina fiber insulation and double shell casing with cooling fans for energy efficiency.
- Three PID digital temperature controllers with 30-segment programmable profiles and S-type thermocouples.
Technical Specifications
| Parameter | Specification |
|---|---|
| Maximum Temperature | 1500°C (max 1400°C continuous) |
| Heating Zones | 3 zones, each 200 mm, total 600 mm |
| Processing Tube Diameter | 60 mm alumina ceramic (optional fused quartz) |
| Tube Rotation Speed | 0 to 10 RPM variable |
| Furnace Tilt Angle | -5° to +20° electrically controlled |
| Heating Elements | 24 silicon carbide rods (14 mm diameter, 150 mm heating length) |
| Automatic Feeder Capacity | Up to 97 cm³/min feed rate, 2 L stainless steel receiving tank |
| Temperature Control | Three PID controllers with 30-segment programming, ±1°C accuracy |
| Power Supply | Furnace: 208-240 V, single phase, 50 A; Feeder: 208-240 V single phase |
| Chamber Pressure | 4.5×10⁻² torr with <0.1 mtorr/s leak rate |
Typical Applications
Ideal for scalable synthesis of lithium-ion battery cathode materials with conductive coatings, rotary CVD processing of silicon/carbon anode materials, and uniform calcination of inorganic compounds requiring controlled atmosphere and temperature precision.
Configuration & Operating Notes
The furnace includes a double shell casing with cooling fans and high purity alumina fiber insulation for energy efficiency. The automatic powder feeder is mounted via an airtight swivel assembly to maintain atmosphere integrity during feeding. Optional laptop with LabVIEW-based temperature control software and WiFi remote control is available for advanced process management. Replacement heating elements are consumable and can be ordered separately. The furnace complies with CE certification; additional NRTL or CSA certification is available at extra cost.
