Zhonghuan Furnace 1200°C Sliding Single-Zone Tube Furnace

Overview

The Zhonghuan Furnace 1200°C Sliding Single-Zone Tube Furnace is a horizontally oriented, programmable resistance-heated thermal processing system engineered for precise high-temperature experimentation under controlled atmospheres or vacuum. Its core architecture employs a single-zone heating configuration with axial thermal uniformity optimized via multi-crystalline mullite fiber insulation—providing >50% energy savings versus conventional refractory linings while maintaining ±1°C temperature stability across the working zone. The furnace operates on resistive Joule heating using OCr27Al7Mo2 alloy wire, a chromium-aluminum-molybdenum grade selected for long-term structural integrity and oxidation resistance up to 1200°C in air or inert gas environments. Unlike fixed-position tube furnaces, its patented sliding mechanism enables full rearward rotation (110°) of the right furnace section, granting unobstructed access to the quartz or ceramic tube without disassembly—critical for rapid sample loading/unloading and real-time visual monitoring during synthesis, annealing, or sintering protocols.

Key Features

• Sliding dual-section furnace body with 110° rearward tilting capability for direct tube access and in-situ observation
• Quick-connect flange system: single stainless-steel clamp secures gas-tight sealing—eliminates multi-bolt法兰 alignment and reduces tube fracture risk during installation
• Dual-ring sealing technology at both tube ends ensures leak rates <1×10⁻³ mbar·L/s under vacuum or positive-pressure inert gas flow
• Micro-adjustable gas inlet/outlet manifolds with needle-valve control for precise atmosphere tuning (N₂, Ar, H₂, forming gas, or vacuum down to 10⁻² mbar with optional pump)
• Intelligent safety interlock suite: automatic power cutoff upon door opening, independent overtemperature cutout (setpoint +15°C), and grounded leakage detection per IEC 61000-6-3
• Active surface cooling: integrated thermal sensor triggers variable-speed exhaust fan when external casing exceeds 50°C—maintains operator-safe surface temperatures during extended high-T operation
• Modular expansion interface: RS-485 port supports daisy-chained communication with up to 200 units; compatible with SCADA, LabVIEW, and custom Python-based monitoring suites

Sample Compatibility & Compliance

This furnace accommodates standard OD 60–100 mm quartz, alumina, or silicon carbide tubes (length ≤1500 mm). Its internal dimensions (1600 × 360 × 740 mm W×H×D) support large-volume crucibles, multi-sample trays, or custom reaction fixtures. The system meets mechanical and electrical safety requirements per GB/T 13306–2011 (Chinese national standard for industrial furnaces) and aligns with functional expectations of ASTM F2623 (standard guide for thermal processing equipment qualification) and ISO/IEC 17025 clause 6.4.1 (validation of environmental conditioning apparatus). Vacuum and gas-flow add-ons enable compliance with USP sterilization validation protocols and semiconductor-grade annealing procedures requiring oxygen partial pressures <1 ppm.

Software & Data Management

The embedded temperature controller offers dual firmware options: a domestic 50-segment programmable PID module or an optional imported 40-segment algorithm with auto-tuning, ramp-soak profiles, and deviation alarms. All setpoints, actual temperatures, and event timestamps are logged internally (≥10,000 records) and exportable via USB or RS-485 to CSV or XML. When networked, the system generates audit-trail-compliant reports satisfying FDA 21 CFR Part 11 requirements—including user authentication, electronic signatures, and immutable change history—for GMP/GLP-regulated labs. Remote supervision includes real-time graphing, alarm escalation via email/SMS, and batch-wise data aggregation across multi-furnace deployments.

Applications

• Controlled-atmosphere synthesis of metal oxides, perovskites, and transition-metal dichalcogenides
• Vacuum-assisted graphitization of carbon precursors and CVD precursor decomposition
• Thermal annealing of thin-film solar absorbers (CIGS, CZTS) and OLED charge-transport layers
• High-temperature aging tests for aerospace composites and nuclear fuel matrix materials
• Calibration of thermocouples (Types K, S, R) and radiation pyrometers per ISO 8573-1
• Pre-sintering of ceramic green bodies prior to HIP or spark plasma sintering

FAQ

What tube materials are compatible with this furnace?
Quartz (up to 1100°C), high-purity alumina (up to 1650°C), and silicon carbide (up to 1500°C) tubes are supported. Maximum recommended tube OD is 100 mm.
Can the furnace operate under reducing atmospheres such as H₂?
Yes—when equipped with hydrogen-rated seals and flow controllers, it supports H₂ concentrations up to 100% at pressures up to 0.2 MPa gauge.
Is third-party calibration certification available?
Factory calibration certificates traceable to NIM (National Institute of Metrology, China) are provided; ISO/IEC 17025-accredited field calibration services can be arranged separately.
How is temperature uniformity verified across the hot zone?
Uniformity is characterized per ASTM E220 using three calibrated Type S thermocouples placed at center, +100 mm, and −100 mm along the tube axis at 1200°C—typical deviation is ±3°C over 300 mm.
Does the system support integration with existing lab automation platforms?
Yes—Modbus RTU and ASCII command sets are documented in the OEM protocol manual; API wrappers for Python, MATLAB, and Node-RED are available upon request.