OTF-1200X-SF Sliding-Rail Flanged Tube Furnace

Overview

The OTF-1200X-SF is a high-precision, sliding-rail flanged tube furnace engineered for controlled thermal processing in atmospheric, inert, reducing, or low-pressure environments—particularly tailored for custom-built chemical vapor deposition (CVD), annealing, sintering, and precursor decomposition applications. Its core architecture integrates a fused quartz tube (100 mm O.D., 94 mm I.D., 750 mm L) housed within a dual-zone insulated chamber, with independent water-cooled flanges enabling safe, repeatable sample insertion and extraction without thermal interruption. Unlike standard fixed-flange furnaces, the OTF-1200X-SF features a mechanically actuated sliding rail system on the right-hand side, allowing linear translation of the entire furnace tube relative to the sealed flange assembly—minimizing thermal stress on seals and eliminating manual tube handling at elevated temperatures. The furnace operates up to 1100°C (with 1200°C short-term capability), delivering stable thermal profiles via a 30-segment programmable PID controller paired with a calibrated K-type thermocouple embedded in the heating zone. Its robust molybdenum-doped Fe-Cr-Al heating elements ensure long service life and consistent resistive heating performance under cyclic thermal loads.

Key Features

• Sliding-rail flange mechanism enables rapid, reproducible sample loading/unloading while maintaining vacuum integrity and thermal stability
• Dual water-cooled flange configuration: right-side sliding flange + intermediate water-cooled isolation flange between preheat and main reaction zones
• KF25 vacuum port integrated into the right flange for direct connection to turbomolecular or rotary vane pumps
• Integrated digital corrosion-resistant vacuum gauge (0.1–1000 mbar range) mounted directly on the flange for real-time pressure monitoring
• PID temperature controller with 30 programmable ramp/soak segments; ±1°C accuracy over full operating range
• Heating zone length: 440 mm; uniformity zone: 100 mm (±2°C at 1100°C under static argon atmosphere)
• UL-certified electrical components (input voltage >24 V); compatible with TÜV, UL, and CSA third-party certification upon request
• Compliant with IEC 61000-6-3 (EMI emission) and IEC 61000-6-2 (immunity) standards for laboratory instrumentation

Sample Compatibility & Compliance

The OTF-1200X-SF accommodates substrates and precursors compatible with fused quartz tube environments—including silicon wafers, ceramic foils, metal foils, carbon fibers, and powder beds—under gas flow rates ≤200 sccm. It supports operation under ambient pressure, controlled inert gas flow (N₂, Ar), reducing atmospheres (H₂/N₂ mixtures), or low-vacuum conditions (down to 10⁻² mbar). Per safety and material integrity requirements, internal absolute pressure must remain ≥0.02 MPa (gauge) when operating above 1000°C; prolonged vacuum exposure at peak temperature is prohibited to prevent quartz devitrification and seal degradation. All gas inlets require certified pressure regulators (e.g., ASTM E2654-compliant stainless steel diaphragm regulators), and furnace operation must conform to local occupational health and safety regulations governing high-temperature equipment (OSHA 1910.1200, EU Directive 2010/32/EU).

Software & Data Management

An optional RS485/USB interface enables integration with Kejing’s proprietary LabFurnaceControl™ software (Windows-compatible), supporting remote temperature profile programming, real-time data logging (≥1 Hz sampling), and audit-trail generation compliant with GLP and FDA 21 CFR Part 11 requirements—including electronic signatures, user access levels, and immutable event logs. Data export formats include CSV, Excel, and XML for traceability in quality management systems (QMS) aligned with ISO 9001:2015 and ISO/IEC 17025:2017. Firmware updates are delivered via secure HTTPS channel with SHA-256 signature verification.

Applications

• Low-pressure CVD of graphene, transition metal dichalcogenides (TMDs), and SiC thin films
• Controlled-atmosphere annealing of perovskite solar cell precursors
• Thermal decomposition of metal-organic frameworks (MOFs) into porous carbons or oxides
• Graphitization of polymer-derived ceramics under inert gas flow
• In-situ synchrotron XRD sample environment (with optional radiation shielding modifications)
• Calibration reference furnace for thermocouple validation per ASTM E230/E230M

FAQ

What is the maximum allowable internal pressure differential during operation?
The furnace tube must not be subjected to a relative pressure exceeding 0.02 MPa (2 bar gauge) at any time. Pressure relief valves or burst disks are recommended for closed-loop gas systems.

Can this furnace be used under high vacuum (≤10⁻⁵ mbar)?
No. Operation below 10⁻² mbar is not supported due to quartz tube permeability and flange seal limitations. For ultra-high vacuum applications, consider a stainless-steel tube variant with metal gasket sealing.

Is the sliding rail mechanism motorized or manually operated?
The rail is manually actuated via precision-ground linear bearings and locking clamps; no motor or pneumatic drive is included by default (motorized upgrade available upon request).

Does the furnace meet CE marking requirements for export to the European Economic Area?
Yes—when equipped with CE-marked power supplies, cooling units, and vacuum components, the system complies with the Machinery Directive 2006/42/EC and Electromagnetic Compatibility Directive 2014/30/EU.