Nanocrystalline Core – FeCuNbSiB (Finemet Type)

High-performance soft magnetic material for advanced power and signal applications

🔬 Material Overview

Our nanocrystalline cores are made from FeCuNbSiB alloy – a Finemet-type material – obtained through precise thermal treatment of an amorphous precursor. After annealing, the material develops a unique nanostructure:
– Iron-silicon crystallites of approximately 10 nm diameter,
– Uniformly embedded in a residual amorphous matrix.

This hybrid structure gives rise to exceptional magnetic properties far beyond conventional materials like ferrite or amorphous metals.

⚙️ Key Magnetic Properties

• Extremely high relative permeability:
  Up to 200,000, adjustable via magnetic field annealing

• Very low coercivity (Hc < 1 A/m)

• Low core loss, especially at low to medium frequencies

• Near-zero magnetostriction (< 0.2 ppm), making it ideal for noise-sensitive applications

• Excellent temperature stability: consistent performance from −40°C to 140°C

• Saturation flux density up to 1.2 T

📐 Material Specifications

• Strip thickness: 13~30 µm

• Width range: 3.2 mm to 30 mm

• Custom core shapes: Toroidal, C-cores, rectangular, custom geometries available

• Permeability tuning: via magnetic field annealing, from 30,000 to 200,000

🧲 Ideal Applications

• Common mode chokes (EMI suppression)

• Current transformers (CTs)

• High-frequency power transformers

• PFC (Power Factor Correction) inductors

• Magnetic amplifiers

• Renewable energy systems (solar, wind)

• EV charging and automotive electronics

• Smart grid and metering solutions

✅ Why Choose Nanocrystalline Cores?

Compared to ferrite or traditional amorphous materials, nanocrystalline cores offer:

• Smaller size, lighter weight for the same inductance

• Better energy efficiency, lower heat generation

• Wide frequency response, suitable for modern high-frequency electronics