High Magnetic Field Annealing Tube Furnace XN-1200X-MH4 – 300°C, SS316L Near-Zero Magnetic Permeability, Three-Layer Tube, Vacuum to 10⁻⁵ Torr, ±1°C Accuracy | Xnergy

Name: High Magnetic Field Annealing Tube Furnace XN-1200X-MH4

Equipment Type: Laboratory Tube Furnace for Sample Annealing in High Magnetic Field, SS316L Near-Zero Magnetic Permeability, Three-Layer Coaxial Structure

Product Code: XN-1200X-MH4

Product Description:

The High Magnetic Field Annealing Tube Furnace XN-1200X-MH4 is a precision tube furnace specifically designed for use inside superconducting high-field magnet bores, enabling in-field thermal annealing experiments that require simultaneous high magnetic field and controlled elevated temperature. The entire furnace body is constructed from SS316L stainless steel, which possesses near-zero magnetic permeability, ensuring that the furnace introduces negligible field distortion or magnetic force into the host superconducting magnet system. The furnace features a three-layer coaxial tube structure: an innermost SiC spiral filament heating element housed in a quartz sheath, a vacuum-sealed sample layer with flange access, and a gas-cooled outer jacket that maintains the outer wall temperature below 30 °C — allowing safe insertion into the room-temperature bore of cryogenic superconducting magnets.

The control system features safety, reliability, simple operation, high temperature-control accuracy, and high furnace temperature uniformity across the 700 mm constant-temperature zone. The sample layer supports vacuum operation down to 50 mTorr via mechanical pump or 10⁻⁵ Torr via molecular pump, as well as controlled atmosphere operation with inert or reactive gases. As a result, the XN-1200X-MH4 is used in condensed matter physics, materials science, and quantum materials research in universities and research institutes requiring combined high magnetic field and thermal treatment capabilities.

Main Functions and Features:

1. SS316L near-zero magnetic permeability construction — the entire furnace is fabricated from SS316L stainless steel, which has near-zero magnetic permeability, eliminating magnetic forces and field distortions that would otherwise arise from ferromagnetic components inside high-field superconducting magnets.
2. Three-layer coaxial tube structure — innermost SiC spiral filament heating element (Φ25 OD × Φ20 ID × 400 mm) in a quartz sheath; intermediate vacuum-sealed sample layer (Φ36 ID × Φ58 OD × 622 mm) for sample placement and atmosphere/vacuum control; outermost gas-cooled jacket (Φ58 ID × Φ90 OD × 622 mm) maintaining the outer wall below 30 °C for safe insertion into the magnet bore.
3. Long heating zone with large constant-temperature region — 1000 mm total heating zone length with a 700 mm constant-temperature zone, enabling uniform thermal treatment of samples positioned at the magnet field center.
4. Wide vacuum range compatibility — sample layer supports vacuum down to 50 mTorr with a mechanical pump or 10⁻⁵ Torr with a molecular pump, enabling both moderate-vacuum and ultra-high-vacuum annealing experiments.
5. Flexible vacuum and gas port configuration — both flanges include standard 3/8″ barbed hose fittings; optional KF25 adapter for higher vacuum throughput; optional 304SS 1/4″ tube fitting × 1/4″ BSPP male connector for high-pressure gas supply.
6. Optional wide-range digital vacuum gauge — gas-type independent digital vacuum gauge covering 3.8×10⁻⁵ to 1125 Torr, providing greater measurement precision and eliminating risks of chamber pressure misreading due to gas-type dependency.
7. PID programmable temperature control with ±1 °C accuracy — 30-stage programmable controller with auto-tune function; built-in over-temperature and broken thermocouple protection; N-type thermocouple temperature measurement.
8. In-house development and manufacturing — customized tube sizes available upon request; equipment supports lifetime technical support and parts replacement.

Main Technical Parameters:

Furnace Structure (Three-Layer Coaxial Design):

Vacuum and Gas System:

Values measured by Xnergy. Typical values for reference; not guaranteed unless otherwise specified.

Application Areas:

• In-field magnetic annealing of permanent magnet materials — field-cooling and field-annealing of NdFeB, SmCo, and other permanent magnets to optimize coercivity and remanence through magnetically aligned thermal treatment
• Magnetic shape memory alloys — annealing of Ni-Mn-Ga and related ferromagnetic shape memory alloys under applied magnetic field to establish preferred martensite variant orientations
• Superconducting material processing — thermal treatment of HTS (high-temperature superconductor) tapes, bulks, and thin films under controlled magnetic field and atmosphere
• Multiferroic and magnetoelectric material research — simultaneous magnetic field and temperature cycling experiments on BiFeO₃, Pb(Zr,Ti)O₃, and related multiferroic compounds
• Spin-orbit coupling and quantum materials — annealing and phase transition studies of topological insulators, Weyl semimetals, and other quantum materials requiring precise combined field-temperature control
• Magnetically ordered thin films and heterostructures — field-setting of exchange bias, magnetic anisotropy, and domain structure in ferromagnetic and antiferromagnetic thin film systems
• Condensed matter physics research — general-purpose in-field thermal treatment platform for university and research-institute experiments requiring combined magnetic field and controlled-temperature environments

Recommended Operating Procedure:

1. Before insertion into the superconducting magnet bore, verify that all furnace components — including flanges, fittings, thermocouple feedthroughs, and gas/vacuum connections — are fully assembled from SS316L or other non-magnetic materials, and confirm no ferromagnetic tools or components are in proximity to the magnet. 2. Confirm that the gas-cooled outer jacket cooling gas supply is flowing correctly before powering on the furnace; the outer wall must remain below 30 °C during operation to protect the magnet bore. 3. Load the sample into a suitable non-magnetic sample holder and insert into the sample layer (Φ36 ID × Φ58 OD × 622 mm) via the vacuum-sealed flange. Position the sample at the center of the 700 mm constant-temperature zone. 4. Assemble and seal the vacuum flanges. For standard gas atmosphere: connect gas supply through the 3/8″ barbed hose fitting (or 304SS 1/4″ tube fitting for high-pressure applications) with a two-stage pressure-reducing valve; limit tube pressure to below 0.02 MPa (3 PSI). For vacuum operation: connect the mechanical pump or molecular pump to the KF25 adapter port and pump down to the target vacuum (50 mTorr mechanical / 10⁻⁵ Torr molecular pump). Monitor the optional digital vacuum gauge continuously. 5. Ramp the superconducting magnet to the target field according to the magnet manufacturer’s procedure, confirming the furnace outer wall temperature remains below 30 °C throughout. 6. On the PID controller, program the target temperature profile (up to 30 segments), including heating rate (≤ 10 °C/min), hold temperature (≤ 250 °C continuous / 300 °C short-term), hold time, and cooling rate. Initiate the program; PID auto-tune control maintains temperature with ±1 °C accuracy. 7. Monitor the temperature, vacuum/pressure, outer wall temperature, and cooling gas flow throughout the run. 8. After the thermal profile completes, allow the furnace to cool before ramping down the magnetic field per the magnet manufacturer’s procedure. Vent the sample layer to atmospheric pressure, open the flanges, and remove the sample. 9. After each run, inspect the SS316L flanges, sealing gaskets, thermocouple, SiC heating filament, and cooling gas connections for wear or contamination.

Important Operating Notices:

• Never bring ferromagnetic tools, components, or objects near the superconducting magnet during operation — the strong magnetic field will accelerate ferromagnetic objects and can cause serious injury or equipment damage.
• The gas-cooled outer jacket must be operating continuously during furnace use — loss of cooling gas flow will cause the outer wall to exceed 30 °C and may damage the superconducting magnet bore or cryogenic components.
• Do not exceed 300 °C (maximum, short-term) or 250 °C (continuous working temperature) — exceeding these limits will damage the SiC heating filament and may compromise the SS316L tube integrity.
• Tube/sample layer internal pressure must not exceed 0.02 MPa (3 PSI / 0.2 bar) — always install a two-stage pressure-reducing valve on the gas cylinder before feeding gas. Monitor pressure continuously during operation.
• Gas flow rate into the sample layer must be kept below 200 SCCM to avoid thermal shock to the heated internal components.
• Follow the superconducting magnet manufacturer’s procedures for all magnet ramp-up, ramp-down, and quench-protection operations. The furnace must be powered off and cooled before any magnet quench event or emergency shutdown.
• Always wear appropriate PPE (safety glasses, gloves, lab coat) when handling the furnace, especially during flange assembly and sample loading/unloading.

Packaging & Storage:

The XN-1200X-MH4 ships fully assembled, including the SS316L three-layer coaxial tube furnace body (SiC spiral filament heating element in quartz sheath, vacuum-sealed sample layer with flanges, gas-cooled outer jacket), N-type thermocouple, 30-stage PID programmable temperature controller with auto-tune and built-in over-temperature and broken thermocouple protection, vacuum-sealed flanges for the sample layer (special three-layer flange and 1″ center tube flange included), standard 3/8″ barbed hose fittings on both flanges, and all standard connecting hardware. Optional KF25 adapter, 304SS 1/4″ tube fittings, and wide-range digital vacuum gauge ship separately when ordered. Vacuum pump (mechanical or molecular) is not included and must be sourced separately. Store in a clean, dry environment away from ferromagnetic materials and corrosive atmospheres. When not in use, seal the flanges and store the furnace horizontally on a stable surface. Inspect the SiC filament, SS316L tube surfaces, flange seals, and cooling gas ports periodically for wear, oxidation, or mechanical damage.

Safety:

For research laboratory use only. This furnace is designed exclusively for use inside superconducting high-field magnet bores — all components are SS316L non-magnetic; introduction of any ferromagnetic material into the magnet environment is strictly prohibited and may cause serious injury. The gas-cooled outer jacket must be operating continuously to maintain the outer wall below 30 °C; never operate the furnace inside a magnet without confirmed cooling gas flow. Do not exceed 300 °C maximum or 250 °C continuous working temperature. Sample layer internal pressure must not exceed 0.02 MPa — always install a two-stage pressure-reducing valve on the gas supply cylinder. Keep gas flow rate below 200 SCCM. Follow all superconducting magnet manufacturer safety protocols for magnet operation, quench response, and cryogen handling. Always wear appropriate PPE during sample loading, flange assembly, and all operations near the magnet. Allow the furnace to cool fully and the magnet to ramp down before opening flanges or removing the furnace from the bore. Refer to the included user manual for complete safety and operating instructions.

Note: Specifications listed above are typical and for reference only. Actual temperature uniformity, vacuum performance, and field compatibility depend on the specific magnet system bore diameter and configuration, sample geometry, atmosphere, and cooling gas flow rate — consult our technical team to verify compatibility with your superconducting magnet system before ordering. Customized tube sizes are available upon request. For researchers exploring related laboratory heat-treatment equipment, see also Xnergy’s related products: High Temperature High Pressure Tube Furnace XN-TH1000 (1100 °C, positive pressure up to 4 MPa), Molecular Pump Tube Furnace XN-TG600-S120CK1 (600 °C, high vacuum 6.67×10⁻³ Pa), Single-Zone Tube Furnace XN-T1200 (1200 °C standard atmosphere/vacuum), and the full Thermal Treatment Equipment category. For complete battery and quantum material research systems, see also Solid-State Electrolytes, Cathode Materials, and Anode Materials.