SK-2-13 High-Temperature Box-Type Muffle Furnace
| Origin | Shanghai, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (PRC) |
| Model | SK-2-13 |
| Rated Temperature | 1300 °C |
| Heating Element | Silicon Carbide (SiC) Rod |
| Power Supply | 220 V AC, 2000 W |
| Chamber Dimensions | Ø30 mm × 180 mm (cylindrical) |
| Compliance | Meets GB/T 10066.1–2004 (General Requirements for Industrial Resistance Furnaces), ISO 9001–certified supply chain |
Overview
The SK-2-13 High-Temperature Box-Type Muffle Furnace is a compact, vertically oriented cylindrical chamber furnace engineered for precise, repeatable thermal processing in research laboratories and quality control environments. It operates on the principle of resistive heating via silicon carbide (SiC) heating elements embedded in high-purity refractory insulation, enabling stable temperature maintenance up to 1300 °C under atmospheric conditions. Unlike open-hearth or tube-style furnaces, its muffle design isolates the sample from direct contact with heating elements and combustion byproducts—ensuring chemical purity, uniform thermal distribution, and minimal cross-contamination during sintering, ashing, calcination, or heat-treatment protocols. The furnace is designed for batch-mode operation (non-continuous), with rapid thermal ramp capability and low thermal mass for efficient energy use and reduced cooldown times between cycles.
Key Features
- Compact cylindrical chamber (Ø30 mm × 180 mm) optimized for small-volume samples including crucibles, rods, powders, and ceramic preforms
- High-density alumina-silica fiber insulation layer between furnace shell and muffle wall, minimizing surface temperature rise and improving thermal efficiency
- Robust steel housing fabricated from cold-rolled carbon steel, finished with electrostatic epoxy powder coating for corrosion resistance and mechanical durability
- Integrated SiC rod heating elements mounted radially within the insulation matrix—rated for >5,000 hours service life at ≤1300 °C with gradual resistance drift <2% per 1,000 h
- Front-loading hinged door with high-temperature ceramic fiber gasket ensures consistent sealing and minimizes thermal leakage during operation
- Compatible with external programmable temperature controllers (e.g., Eurotherm 2404 or equivalent) supporting PID tuning, ramp-soak profiles, and over-temperature cut-off protection
Sample Compatibility & Compliance
The SK-2-13 accommodates standard laboratory crucibles (alumina, quartz, graphite, or platinum), metal coupons (≤5 g), ceramic green bodies, and mineral specimens. Its muffle geometry supports both horizontal and vertical sample orientation within the cylindrical bore. All internal refractory components conform to GB/T 2997–2015 (apparent porosity and bulk density of refractories) and are free of volatile binders that could outgas above 1000 °C. The furnace meets structural and safety requirements outlined in GB/T 10066.1–2004 and aligns with general-purpose laboratory equipment provisions under ISO/IEC 17025:2017 for thermal calibration traceability. While not intrinsically certified for hazardous area use, it complies with IEC 61000-6-3 (EMC emission limits) and IEC 61000-6-2 (immunity standards) when operated with compliant controllers.
Software & Data Management
The SK-2-13 is controller-agnostic and does not include embedded firmware or proprietary software. It interfaces seamlessly with third-party industrial controllers supporting analog (4–20 mA) or digital (RS485 Modbus RTU) input/output. When paired with GLP-compliant controllers, full audit trails—including setpoint history, actual temperature logs, alarm events, and operator ID stamps—can be generated and exported in CSV or XML format. Data integrity adheres to FDA 21 CFR Part 11 principles when deployed with validated controller systems featuring electronic signatures, role-based access control, and non-erasable event logging. Calibration records (per ISO/IEC 17025 Clause 6.5) must be maintained externally using NIST-traceable thermocouples (Type S or R) and documented per institutional SOPs.
Applications
- Thermal gravimetric analysis (TGA) sample pre-treatment and residue quantification
- Sintering of oxide ceramics (e.g., Al₂O₃, ZrO₂) and ferrite compacts
- Ash content determination in food, pharmaceutical, and environmental samples (AOAC 923.03, ASTM D3174)
- Heat treatment of small-diameter tool steels and alloy wires (annealing, stress relieving)
- Pre-firing of catalyst supports and battery electrode precursors
- Calibration verification of thermocouples and infrared pyrometers at fixed-point temperatures (e.g., Ag, Cu, Co-C)
FAQ
What is the maximum recommended continuous operating temperature?
The SK-2-13 is rated for continuous operation at 1300 °C; prolonged exposure above this limit accelerates SiC element degradation and compromises insulation integrity.
Can this furnace be used under inert or reducing atmospheres?
No—this model is designed for air-atmosphere operation only. For controlled atmospheres, a sealed tube furnace with gas inlet/outlet ports and pressure-rated construction is required.
Is the furnace supplied with a temperature controller?
No—the SK-2-13 is sold as a furnace-only unit. A compatible external controller must be selected based on required accuracy (±1 °C typical), ramp rate (0.1–20 °C/min), and compliance needs.
What maintenance is required for long-term reliability?
Biannual inspection of door gasket compression, visual check of SiC rod integrity (cracks or whitening), and recalibration of the external controller using a reference thermocouple are recommended.
Does the unit comply with CE or UL safety directives?
It carries no CE or UL mark. Compliance with EN 61000-6-2/-3 and UL 61010-1 requires integration into a fully certified system by an authorized panel builder.
