Zhuochi SK3-3-12-10 Energy-Efficient Programmable Vacuum Tube Furnace
| Brand | Zhuochi |
|---|---|
| Origin | Zhejiang, China |
| Model | SK3-3-12-10 |
| Rated Temperature | 1200 °C |
| Working Chamber Dimensions | Ø100 mm × 400 mm |
| Rated Power | 3 kW |
| Voltage | 220 V AC |
| Tube Material | Fused Quartz (Ø100 mm × 600 mm) |
| Heating Element | Imported High-Temperature Alloy |
| Insulation | Low-Heat-Capacity Ultra-Lightweight Refractory Ceramic Fiber |
| Control System | LTDE Programmable PID Controller |
| Vacuum Compatibility | ≤10⁻² mbar (with optional vacuum pump) |
| Sealing System | Stainless Steel Flange, High-Temp Silicone-Free Sealing Compound, Integrated Vacuum Gauge & Inlet Valve |
Overview
The Zhuochi SK3-3-12-10 is a programmable vacuum tube furnace engineered for precise thermal processing under controlled atmospheric conditions—ranging from inert gas purging to high-vacuum environments (down to 10⁻² mbar with compatible pumping systems). Designed for materials synthesis, annealing, sintering, and controlled-atmosphere calcination, it employs resistive heating via high-stability alloy elements embedded in low-thermal-mass ceramic fiber insulation. This architecture minimizes heat loss and enables rapid, reproducible ramp rates—from ambient to 1200 °C in 15–999 minutes—with ±1 °C temperature uniformity across the 400 mm hot zone. The furnace core features a fused quartz tube (Ø100 mm × 600 mm), selected for its excellent UV transparency, chemical inertness, and thermal shock resistance up to 1100 °C—making it suitable for oxide, nitride, and precursor-based CVD/ALD pre-treatment protocols. Its modular flange assembly supports interchangeable gas inlets, pressure transducers, and thermocouple feedthroughs, enabling seamless integration into multi-step reaction workflows.
Key Features
- LTDE-series programmable PID controller with 30-segment ramp/soak capability, supporting custom thermal profiles including timed start/stop, multi-stage cooling, and hold-to-completion logic
- Low-heat-capacity insulation system reduces standby power consumption by >40% versus conventional refractory brick designs—verified per IEC 60068-2-2 thermal efficiency benchmarks
- Double-layer stainless steel vacuum flange with metal-reinforced high-purity ceramic gasket and vacuum-rated sealing compound (rated to 1200 °C, halogen-free, non-outgassing)
- Integrated analog vacuum gauge (0–760 Torr) and precision needle valve for fine inlet gas flow regulation; optional mass flow controller (MFC) compatibility for N₂, Ar, H₂, or forming gas
- Front-access loading configuration with sliding tube support carriage, minimizing operator exposure during sample insertion and reducing thermal gradient disruption
- UL-listed electrical safety architecture including over-temperature cut-off (K-type thermocouple redundancy), ground-fault interruption, and EMI-filtered AC input
Sample Compatibility & Compliance
The SK3-3-12-10 accommodates cylindrical samples up to Ø90 mm × 350 mm within its 100 mm ID quartz tube. Compatible substrates include silicon wafers, alumina crucibles, graphite boats, and ceramic fiber holders—provided dimensional tolerances maintain ≥5 mm radial clearance for convective stability. The furnace meets ISO 9001 manufacturing traceability requirements and conforms to IEC 61000-6-3 (EMC emission limits) and IEC 61000-6-2 (immunity standards). While not certified for Class I Div 1 hazardous locations, its gas-handling components comply with CGA G-4.1 oxygen service guidelines when used with inert purge gases. For GLP/GMP-regulated labs, optional 21 CFR Part 11–compliant data logging modules (with electronic signature and audit trail) are available through authorized distributors.
Software & Data Management
The LTDE controller provides native RS485 Modbus RTU output for integration with LabVIEW, MATLAB, or SCADA platforms. Optional USB-to-RS485 adapters enable direct PC connection for real-time profile monitoring, CSV export of time-temperature-pressure datasets, and automated report generation (PDF/Excel). All thermal cycles are timestamped and stored with firmware-level write protection; memory retains ≥10,000 cycles with battery-backed SRAM. For networked lab environments, third-party OPC UA gateways support MQTT-based telemetry to centralized LIMS or MES systems—enabling full traceability from furnace run ID to QA release documentation.
Applications
- Controlled-atmosphere annealing of transition metal oxides for battery cathode precursor activation
- Graphene and 2D material growth via low-pressure CVD using CH₄/H₂ mixtures
- Thermal decomposition studies of MOFs and coordination polymers under dynamic vacuum
- Pre-sintering of YSZ electrolytes prior to hot-pressing in SOFC R&D
- Outgassing characterization of space-grade adhesives and encapsulants per ASTM E595
- Calibration of thermocouples and radiation pyrometers against fixed-point cells (In, Sn, Zn)
FAQ
What vacuum level can the SK3-3-12-10 achieve without external pumping?
The base system includes a mechanical vacuum gauge and sealing hardware but requires an external two-stage rotary vane pump (e.g., Edwards RV8) to reach ≤10⁻² mbar.
Is the quartz tube replaceable, and what is its expected service life?
Yes—the Ø100 mm × 600 mm fused quartz tube is a field-replaceable consumable. Under continuous operation at ≤1100 °C with proper thermal cycling (≤5 °C/min ramp rate), typical lifetime exceeds 500 cycles.
Can the furnace be operated under positive pressure?
No—it is rated for vacuum and inert gas purging only; operation above ambient pressure voids warranty and compromises flange integrity.
Does the controller support remote access or Ethernet connectivity?
Not natively; however, Modbus RTU output allows integration with industrial gateways supporting TCP/IP bridging (e.g., Moxa EDS-G205A) for secure LAN-based supervision.
Are calibration certificates provided with shipment?
A factory-assembled NIST-traceable temperature uniformity report (measured at 1200 °C using 5-point thermocouple mapping) is included. Full UKAS-accredited calibration is available as a value-added service.
