GM412B
Magnetic properties toroidal boxed magnetic cores from amorphous and nanocrystalline alloys
GAMMAMET® 412B
Magnetic cores GAMMAMET® 412B are made of a ribbon by thickness 25 microns with nanocrystalline structure. The ribbon is produce by means of fast incandescence from an alloy on the basis of iron. After thermal processing in a cross-section magnetic field magnetic cores have high linearity of a curve of magnetization, a low residual and low specific magnetic losses
Magnetic cores may be produced with any standard sizes with external diameter up to 140 mm, with internal diameter not less than 8 mm, proportional 5 mm at height and are delivered in protective containers.
Sizes list of magnetic cores in protective containers you can see in Table 1. Weight and geometrical sizes of toroidal boxed magnetic cores
All magnetic cores have a class of thermal stability A (105°C). At will of the customer also magnetic cores may be produced with class F (155°C).
Full service life of magnetic cores - 30 years.
Magnetic cores GAMMAMET® 412B replace soft magnetic alloys Fe- and Ni- alloys and ferrite with a linear curve of magnetization. Next table of magnetic parameters is agreed with specifications ТУ 1261-030-12287107-2007:
| Magnetic core | Squareness ratio Kp800, not more | Coercive force, A/m, not more | B800, T, not less |
|---|---|---|---|
| GM 412A | 0,15 | 8,0 | 1,45 |
Use area: High-frequency transformers, pulse transformers, matching transformers, broadband transformers, measuring transformers of a power and voltage.
GAMMAMET® owns following patents of Russia which are used at manufacture of magnetic cores GM412B: 2149473.
The detailed information about magnetic properties of GM412B can be found in the book: Starodubtsev J.N., Belozerov V.J. "Magnetic properties amorphous and nanocrystalline alloys"
| Magnetic induction, В800 | 1,5 T |
|---|---|
| Maximum permeability | 20000 |
| Coercive force | 4 A/m |
| Squareness ratio Br/B800 | 0,06 |
| Saturation magnetostriction | 25×10-6 |
| Specific electroresistance | 1,3×10-6 Оm×m |
| Density | 7300 kg/m3 |
| Curie temperature | 420°C |
| Specific magnetic losses at frequency f<3 kHz | |
| P = 1,2×10-3f1,1Bm1,6 (W/kg3) | |
| Specific magnetic losses at frequency 3<f<200 kHz | |
| P = 3×10-5f1,6Bm2,1 (W/kg3) | |
| f – frequency (Hz), Вm – maximal magnetic induction (T) | |
Loop of a magnetic hysteresis
Curves of magnetization
Magnetic permeability
