KJ GROUP ZG Series Microwave Tube Furnace
| Brand | KJ GROUP |
|---|---|
| Origin | Liaoning, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | ZG |
| Pricing | Available Upon Request |
| Microwave Frequency | 2.45 GHz |
| Max Operating Temperature | 1150 °C (ZG1512/ZG3012) / 1600 °C (ZG1516/ZG3016) |
| Microwave Output Power Range | 0.01–1.40 kW (ZG15xx) / 0.01–2.80 kW (ZG30xx), continuously adjustable |
| Heating Chamber Dimensions | Ø40×130 mm or Ø60×120–130 mm (diameter × length) |
| Vacuum Level | ≤100 Pa (static) |
| Microwave Leakage | <0.05 mW/cm² (ZG1512/ZG3012) / <0.5 mW/cm² (ZG1516/ZG3016) |
| Temperature Measurement | Type S or B thermocouple (0–1300 °C or 0–1650 °C) / Infrared pyrometer (300–1800 °C) |
| Temperature Control Accuracy | ±0.1% of reading |
| Control System | Mitsubishi PLC + Schneider HMI touchscreen |
| Programmable Steps | 40-segment ramp-soak profile with data logging, export (CSV), real-time curve display, and dynamic screen saver |
| Atmosphere Compatibility | Oxidizing, inert, and mildly reducing gases via rapid pre-vacuum gas exchange |
| Safety Features | Interlocked door switch, over-temperature cutoff, magnetron overcurrent protection |
| External Dimensions (main unit) | ~530×430×380 mm (ZG15xx) / ~550×800×500 mm (ZG3016) |
| Stand Dimensions | ~900×500×700 mm (ZG15xx) / ~1000×600×800 mm (ZG3016) |
| Insulation | Multi-layer low-conductivity ceramic fiber architecture |
Overview
The KJ GROUP ZG Series Microwave Tube Furnace is a standardized, multi-atmosphere experimental workstation engineered for precision thermal processing under controlled gaseous environments. Unlike conventional resistance-heated tube furnaces, the ZG series utilizes 2.45 GHz industrial-grade microwave energy to directly couple with dielectric and semiconducting materials—enabling volumetric, selective, and rapid heating. This coupling mechanism reduces thermal gradients, suppresses grain coarsening during sintering, and improves phase homogeneity in ceramic, metallic, and composite synthesis. Designed for laboratory-scale R&D in materials science, catalysis, battery electrode development, and advanced ceramics, the system integrates vacuum pumping, gas handling, microwave generation, and closed-loop temperature control within a single robust platform. Its modular architecture supports reproducible process transfer from benchtop to pilot scale, aligning with GLP-compliant documentation requirements for method validation.
Key Features
- Integrated vacuum-microwave chamber: Unified structural design eliminates external flange interfaces, minimizing leak paths and enhancing operational safety under vacuum or pressurized atmospheres.
- Adjustable microwave power delivery: Continuous 0.01–2.80 kW output (model-dependent) enables precise energy dosing—critical for avoiding thermal runaway in sensitive precursors or nanomaterials.
- Rapid atmosphere conditioning: Pre-evacuation to ≤100 Pa followed by controlled gas backfilling reduces purge time by >70% compared to flow-purge-only systems, conserving high-purity gases and improving process repeatability.
- Multi-layer thermal insulation: Low-conductivity ceramic fiber modules minimize radial heat loss and stabilize axial temperature profiles across the Ø40–60 mm × 120–130 mm hot zone.
- Dual-mode temperature monitoring: Optional thermocouple (Type S/B) and infrared pyrometry (300–1800 °C) provide cross-validated measurement—essential for high-temperature calibration traceability per ISO/IEC 17025 guidelines.
- Comprehensive safety interlocks: Door-position sensing, magnetron current monitoring, and real-time surface temperature surveillance ensure compliance with IEC 61000-3-2 (EMC) and IEC 62493 (microwave emission) standards.
Sample Compatibility & Compliance
The ZG furnace accommodates cylindrical samples up to 60 mm in diameter and 130 mm in length, compatible with standard quartz, alumina, or silicon carbide tubes rated for continuous operation at 1600 °C. It supports oxidative (air, O₂), inert (Ar, N₂), and mildly reducing (5% H₂/Ar, CO) atmospheres—validated per ASTM E2913 for reactive gas compatibility. All electrical components meet CE marking requirements; microwave shielding conforms to EN 61000-4-3 (radiated immunity) and EN 55011 (emission limits). The system’s vacuum integrity and gas-tightness are certified to ISO 10816-3 for rotating machinery vibration thresholds, ensuring stable operation during long-duration thermal cycles.
Software & Data Management
Control firmware runs on a Mitsubishi FX5U PLC with Schneider HMIGXO touchscreen interface, supporting 40-segment programmable thermal profiles. Each segment defines ramp rate (°C/min), soak time (min), and power setpoint (% of max). All process variables—including microwave forward/reflected power, chamber pressure, thermocouple/pyrometer readings, and magnetron status—are timestamped and logged at user-selectable intervals (1–60 s). Data exports natively to CSV for post-processing in MATLAB, Python (Pandas), or JMP. Audit trails include operator ID, parameter changes, and alarm events—fully compliant with FDA 21 CFR Part 11 for electronic records in regulated environments. Optional Ethernet/IP or Modbus TCP integration enables SCADA-level supervision.
Applications
- Solid-state synthesis of Li-ion cathode materials (e.g., NMC, LFP) with reduced lithium loss and improved cation ordering.
- Rapid densification of transparent ceramics (YAG, spinel) without secondary phase formation.
- Controlled carbothermal reduction of metal oxides (e.g., TiO₂ → TiC) under argon/hydrogen mixtures.
- Thermal annealing of CVD-grown 2D materials (MoS₂, graphene) to tune defect density and carrier mobility.
- Decomposition kinetics studies of MOFs and coordination polymers under programmed gas atmospheres.
FAQ
What vacuum level can the ZG furnace achieve, and how is it maintained?
The system reaches a static base pressure of ≤100 Pa using an integrated two-stage rotary vane pump. A pneumatic isolation valve separates the pump from the chamber during gas processing to prevent oil backstreaming.
Can the furnace operate under positive pressure?
Yes—when equipped with optional pressure-rated quartz tubes and reinforced sealing, it supports up to 0.2 MPa(g) with mass-flow-controlled gas injection and pressure feedback regulation.
Is remote monitoring supported?
Standard Ethernet connectivity allows secure web-based access to real-time process data and historical logs via HTTPS-enabled dashboard—no proprietary software required.
How is temperature uniformity verified across the heating zone?
Uniformity is characterized per ASTM E220 using three calibrated thermocouples positioned at center, +30 mm, and –30 mm along the tube axis; typical deviation is ±5 °C at 1200 °C.
Does the system support IQ/OQ documentation for GMP labs?
Yes—KJ GROUP provides factory-verified Installation Qualification (IQ) and Operational Qualification (OQ) protocols aligned with Annex 15 and USP analytical instrument qualification principles.
