ZHONGHUAN FURNACE 1200℃ Dual-Zone Tube Furnace

Overview

The ZHONGHUAN FURNACE 1200℃ Dual-Zone Tube Furnace is a precision-engineered thermal processing system designed for controlled atmosphere synthesis, heat treatment, sintering, annealing, and crystal growth in research laboratories and materials development facilities. Its dual independent heating zones enable precise axial temperature gradient control—critical for applications such as zone refining, CVD precursor decomposition, and multi-step thermal protocols requiring spatially resolved thermal profiles. The furnace operates on resistive heating via high-stability OCr27Al7Mo2 alloy wire embedded in vacuum-formed polycrystalline mullite fiber insulation, delivering uniform radial and axial temperature distribution with ≤±1℃ setpoint stability under steady-state conditions. Constructed with a rigid steel frame and modular refractory architecture, the system supports both ambient-pressure inert/vacuum and low-to-medium vacuum (<10⁻² mbar) operation when integrated with optional vacuum pumping modules.

Key Features

• Dual independent PID-controlled heating zones with programmable ramp/soak profiles—enabling axial thermal gradients from isothermal to stepped or linear gradients up to 100℃/cm.
• Quick-connect flange interface with single-clamp gas-tight coupling—eliminates threaded法兰 assembly, reduces installation-induced tube stress, and minimizes risk of quartz/ceramic tube fracture during repeated setup cycles.
• Top-hinged upper furnace section with 110° rearward tilt—provides unobstructed access to the full tube length for sample loading/unloading and real-time visual monitoring without disassembly.
• Dual-ring sealing technology at both tube ends—ensures leak rates <1×10⁻⁴ mbar·L/s with standard O-rings; compatible with metal gaskets for high-vacuum or corrosive gas environments.
• Intelligent surface-cooling system—integrated thermal sensors activate an axial exhaust fan automatically when external casing temperature exceeds 50℃, maintaining safe operator contact surfaces and extending structural component lifetime.
• Integrated safety interlocks: automatic power cutoff upon furnace door opening, overtemperature cut-off with audible/visual alarm, and ground-fault circuit interruption (GFCI) protection compliant with IEC 61000-4-5 surge immunity standards.

Sample Compatibility & Compliance

The furnace accommodates standard OD 60–100 mm quartz, alumina, or silicon carbide tubes (custom lengths up to 600 mm). Its internal chamber (340 × 580 × 555 mm W×D×H) permits vertical or horizontal orientation of substrates, crucibles, boats, or catalyst beds. Gas inlet/outlet ports support mass flow controllers (MFCs) or rotameters for precise atmosphere control (N₂, Ar, H₂, NH₃, forming gas, etc.). The system meets general laboratory safety requirements per EN 61000-6-2 (immunity) and EN 61000-6-3 (emissions), and its programmable controller architecture supports audit-ready operation under GLP and GMP frameworks when configured with optional 21 CFR Part 11-compliant software logging.

Software & Data Management

The furnace is equipped with RS-485 communication interface (Modbus RTU protocol) for integration into centralized lab control networks. Optional PC-based software enables remote supervision of up to 200 units simultaneously—supporting real-time temperature trending, event-triggered data capture, automated report generation (PDF/CSV), and secure user-access hierarchy. Both domestic and imported controller variants offer multi-segment programming: 50 segments (domestic) or 40 segments (imported), each with independent ramp rate, soak time, and hold temperature parameters. Touchscreen upgrade option includes color TFT display with graphical interfaces—real-time curve overlay, historical trend comparison, alarm log with timestamps, and configurable data export formats.

Applications

• Controlled-atmosphere synthesis of transition metal oxides, perovskites, and MXenes.
• Thermal annealing of thin-film devices (e.g., OLED layers, TCO coatings) under N₂/H₂ mixtures.
• Graphitization and carbonization of polymer-derived ceramics (PDCs) and biochar precursors.
• Low-pressure CVD of graphene and h-BN monolayers using pre-mixed gas delivery systems.
• Calibration reference source for thermocouple verification across 300–1100℃ ranges (per ASTM E230/E220).
• Pre-sintering and debinding stages in ceramic injection molding (CIM) process development.

FAQ

What tube materials are compatible with this furnace?
Quartz (up to 1100℃), high-purity alumina (up to 1600℃), and silicon carbide (up to 1400℃) tubes are supported; maximum recommended OD is 100 mm.
Can the two zones operate at different temperatures simultaneously?
Yes—each zone has independent thermocouple feedback and PID tuning, enabling stable differential setpoints (e.g., 800℃/zone 1 and 1050℃/zone 2) with cross-zone thermal drift <±3℃ after 2-hour stabilization.
Is vacuum compatibility included as standard?
The base configuration supports inert gas purging and low-vacuum operation (<10⁻¹ mbar) with optional mechanical pump; high-vacuum (<10⁻⁵ mbar) requires separate turbomolecular pumping and metal-sealed flanges.
Does the system support third-party MFC integration?
Yes—standard 0–5 V or 4–20 mA analog inputs accept signals from commercial mass flow controllers; digital Modbus integration is also available via RS-485.
What documentation is provided for regulatory compliance?
Factory calibration certificates (traceable to NIST standards), CE declaration of conformity, electrical safety test reports, and optional IQ/OQ validation templates are supplied upon request.