GM503B

Magnetic properties toroidal boxed magnetic cores from amorphous and nanocrystalline alloys

GAMMAMET® 503B

Magnetic cores GAMMAMET® 503B 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® 503В replace soft magnetic alloys Fe- and Ni- alloys and ferrite with a rectangular loop of a magnetic hysteresis. Next table of magnetic parameters is agreed with specifications ТУ 1261-030-12287107-2007:

Magnetic core Squareness ratio Kp800, no more Initial relative magnetic permeability, not less Coercive force, A/m, not more Magnetic induction B800, T, not less
GM 503B – 1 class 0,07 15000 0,8 0,55
GM 503В – 2 class 0,1 30000 0,6 0,55

Use area: high frequency transformers, pulse transformers, match transformers, broadband transformers, measuring transformers of a current and voltage.

GAMMAMET® owns following patents of Russia which are used at manufacture of magnetic cores GM503B: 2098505, 2115968.

The detailed information about magnetic properties of GM503А can be found in the book: Starodubtsev J.N., Belozerov V.J. "Magnetic properties amorphous and nanocrystalline alloys"

Typical physical properties
Magnetic induction of saturation В800 0,58 T
Initial relative magnetic permeability 40000
Maximum permeability 50000
Coercive force 0,25 A/m
Squareness ratio Br/B800 0,03
Saturation magnetostriction <0,2×10-6
Specific electroresistance 1,2×10-6 Om×m
Density 7700 kg/m3
Curie temperature 260°C
Temperature of crystallization 530°C
Specific magnetic losses at frequency3<f<200 kHz
P = 7,5×10-7f1,86Bm2,03 (W/kg)
f – frequency (Hz), Вm – maximal magnetic induction (T)

Loop of a magnetic hysteresis

Curves of magnetization

Magnetic permeability