Transverse Magnetic Furnace

2. Product Overview

Our Vacuum Magnetic Field Annealing Furnace is a specialized solution engineered for the high-end heat treatment of amorphous and nanocrystalline cores. By combining a high-vacuum/nitrogen atmosphere with a precisely controlled Transverse Magnetic Field, this equipment optimizes the magnetic permeability and hysteresis loops of electronic components like mutual inductors and transformer cores. Designed for flexibility, our systems can also be customized to include Longitudinal Magnetic Fields to meet specific magnetic orientation requirements.

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3. Key Features & Benefits

• Dual Magnetic Field Capability: Standard configuration features a powerful Transverse Magnetic Field, with the option to integrate a Longitudinal Magnetic Field based on custom process requirements.

• Vacuum & Nitrogen Protection: High-performance vacuum system combined with high-purity nitrogen purging ensures an oxygen-free environment, preventing oxidation and ensuring bright, high-performance magnetic cores.

• Optimized Magnetic Properties: Specifically designed to enhance the magnetic induction and lower the coercivity of amorphous and nanocrystalline materials.

• Uniform Thermal & Magnetic Fields: Advanced heater placement and magnetic coil design ensure that every core in the batch experiences identical thermal and magnetic flux conditions.

• Precision Cooling Control: Features controlled cooling rates to lock in the desired nanocrystalline structure after the solution phase.

• Smart Process Automation: PLC-controlled cycles for vacuum pumping, heating, magnetic field activation, and gas cooling, ensuring batch-to-batch consistency.

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4. Technical Specifications

Data-driven specs for electronic engineers.

Feature	Specification
Magnetic Field Direction	Transverse (Standard) / Longitudinal (Optional)
Magnetic Intensity	Up to 3000 Gauss
Vacuum Level
Max Temperature	650°C (Optimized for Nanocrystalline)
Atmosphere	Nitrogen
Temp. Uniformity	±3 °C

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5. Specialized Applications

This furnace is essential for the production of:

• Current Transformers (CT): Optimizing the accuracy and linearity of mutual inductors.

• Nanocrystalline Cores: Stress-relief and magnetic alignment for high-frequency transformers.

• Amorphous Ribbons: Specialized annealing for power distribution and EMC components.

• Electric Vehicle (EV) Components: Magnetic core processing for high-efficiency onboard chargers and inverters.

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6. Why Choose Our MFA Technology?

• Advanced Material Science: We understand the delicate transition temperatures of nanocrystalline alloys and provide the stability required to achieve the “Alpha-Iron” crystalline phase.

• Custom Magnetic Profiles: Whether you need a static field or a pulsed magnetic field, our engineering team can tailor the electromagnetic system to your R&D or production goals.

• Reliable Vacuum Integrity: Uses high-quality valves and pumps to maintain a leak-free environment, critical for the surface quality of ultra-thin ribbons.

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7. FAQ

Q: What is the benefit of adding a Transverse Magnetic Field during annealing?

A: Applying a Transverse Magnetic Field during the annealing process induces a specific magnetic anisotropy. For amorphous and nanocrystalline cores, this results in a “flat” hysteresis loop, significantly improving the permeability and reducing core loss at high frequencies.

Q: Can your furnace support both Nitrogen and Vacuum processes?

A: Yes. The system can operate under high vacuum for initial de-gassing and then be backfilled with high-purity Nitrogen to assist in heat transfer and prevent the evaporation of alloying elements at higher temperatures.