Zhuochi SK3-6-13-8 Energy-Efficient Programmable Vacuum Tube Furnace
| Brand | Zhuochi |
|---|---|
| Origin | Zhejiang, China |
| Model | SK3-6-13-8 |
| Chamber Dimensions | Ø80 × 700 mm |
| Max Operating Temperature | 1300 °C |
| Rated Power | 6 kW |
| Voltage | 380 V AC |
| Tube Material | Fused Quartz or Alumina (Ø80 × 900 mm) |
| Sealing System | Stainless Steel Flange, High-Temp Vacuum Sealant, Integrated Vacuum Gauge & Inlet Valve |
| Control System | LTDE Programmable Temperature Controller (Multi-Stage Ramp/Soak/Timer) |
Overview
The Zhuochi SK3-6-13-8 is a programmable vacuum tube furnace engineered for precision thermal processing under controlled atmospheric conditions. Designed for laboratory-scale synthesis, annealing, sintering, and heat treatment of advanced materials, it operates on the principle of resistive heating via high-purity alloy heating elements embedded in low-thermal-mass insulation. The furnace achieves stable vacuum environments (typically ≤10⁻² mbar with optional pump integration) and supports inert, reducing, or reactive gas atmospheres when coupled with mass flow controllers. Its core architecture integrates a double-walled stainless steel vacuum chamber, a fused quartz or high-purity alumina reaction tube (Ø80 × 900 mm), and a robust flanged sealing system rated for continuous operation up to 1300 °C. Unlike conventional muffle furnaces, this tube configuration enables direct sample exposure to uniform radial temperature gradients and facilitates in-situ gas exchange—critical for reproducible ceramic sintering, catalyst activation, and thin-film precursor decomposition.
Key Features
- Energy-optimized thermal design using ultra-lightweight, low-heat-capacity insulating materials—reduces standby losses and accelerates thermal response.
- LTDE-series programmable controller with up to 30 segment ramp/soak profiles; supports custom heating/cooling rates (0.1–20 °C/min), timed start/stop, and auto-shutdown logic.
- Vacuum-tight sealing assembly comprising 304 stainless steel end flanges, high-temperature silicone-free sealant (rated to 1300 °C), analog vacuum gauge (0–1000 mbar), and dual-purpose inlet valve for gas purging or vacuum line connection.
- Modular tube compatibility: accepts both fused quartz (for ≤1100 °C applications requiring optical transparency or low metal contamination) and sintered alumina tubes (for extended 1300 °C stability and superior mechanical rigidity).
- Integrated safety interlocks including over-temperature cutoff (independent from main controller), door-open power disable, and real-time heater current monitoring.
Sample Compatibility & Compliance
The SK3-6-13-8 accommodates cylindrical samples up to Ø70 mm in diameter and 600 mm in length within its Ø80 × 700 mm hot zone. It is routinely employed for processing powders, pellets, fibers, coated substrates, and small-volume crucibles (e.g., graphite, alumina, or platinum). The furnace complies with general electrical safety standards IEC 61010-1 (Laboratory Equipment) and meets CE marking requirements for EMC and LVD directives. While not certified to ISO/IEC 17025 or GLP as a standalone instrument, its programmable control architecture—including audit-trail-capable parameter logging (via optional RS485/USB interface)—supports traceable process documentation required under GMP-aligned research protocols (e.g., ASTM C1171 for refractory testing or ISO 11507 for UV/weathering simulation pre-treatment).
Software & Data Management
The LTDE controller provides local HMI-based operation with password-protected parameter editing and non-volatile profile storage (≥100 programs). Optional communication modules enable serial (RS485) or USB connectivity to host PCs running third-party SCADA or LabVIEW environments. Data export is supported in CSV format, capturing timestamped temperature, setpoint, and event logs (e.g., “Soak Start”, “Cooling Initiated”). For regulated environments, users may configure external data acquisition systems compliant with FDA 21 CFR Part 11 requirements—ensuring electronic records integrity through user authentication, audit trails, and digital signature support at the software layer.
Applications
- Solid-state synthesis of oxide ceramics (e.g., LiCoO₂, YBCO) under argon or nitrogen purge.
- Thermal reduction of metal oxides (e.g., CuO → Cu nanoparticles) in hydrogen/nitrogen mixtures.
- Graphitization and carbonization of polymer-derived precursors at controlled heating rates.
- Pre-oxidation of Ni-based superalloys prior to TGA or dilatometry analysis.
- Calibration reference annealing for thermocouple verification per ASTM E230/E230M Annex A3.
- Low-pressure pyrolysis studies of MOFs and covalent organic frameworks (COFs).
FAQ
What vacuum level can the SK3-6-13-8 achieve without an external pump?
The integrated seal system maintains static vacuum integrity but requires an external two-stage rotary vane or diaphragm pump to reach operational pressures below 10⁻¹ mbar.
Is the quartz tube included standard with the SK3-6-13-8?
Yes—the furnace ships with one fused quartz tube (Ø80 × 900 mm) and matching stainless steel end caps with O-rings and high-temp sealant.
Can the furnace be operated under positive pressure?
It is designed for vacuum and inert gas purging only; sustained positive pressure (>1.2 atm) is not recommended due to flange and seal limitations.
Does the LTDE controller support Ethernet or Wi-Fi connectivity?
No—native connectivity is limited to RS485 and USB; Ethernet gateways require external industrial protocol converters.
What is the typical time-to-temperature for a 1300 °C ramp from ambient?
Using the default 10 °C/min ramp rate, full ramp time is approximately 2.5 hours; faster rates (up to 20 °C/min) are programmable but may reduce element lifetime at maximum temperature.
