mordashka
Magnetics Epcos (Siemens Matsushita Components), Germany TDK Ferroxcube
North West Laboratory

Engineering Center SZL and LEPCOS
— General representative of Epcos AG by ferrite in the CIS
— Official distributor and general representative for ferrites of
    TDK Electronics Europe Gmbh in the CIS
— Authorized distributor of Magnetics in Russia, CIS and Baltic countries
— Exclusive distributor of USM in Russia and CIS countries
— Official Distributor Temex Ceramics in Russia and CIS
 
Products » Amorphous and nanocrystalline Cores » Toroidal amorphous and nanocrystalline MSTATOR cores » Characteristics of amorphous and nanocrystalline AMAG alloys »

Characteristics of amorphous and nanocrystalline AMAG alloys

MSTATOR produces ribbons on the base of amorphous and nanocrystalline AMAG alloys with a width form 1 to 30 mm and a thickness from 15 to 30 µm.

Comparative characteristics of amorphous and nanocrystalline alloys and other (traditionally used) soft magnetic materials are listed in table 1:
Table 1
Material Electrotechnical steel Permalloy Mn-Zn Ferrite Amorphous alloy Nanocrystalline Alloy
Properties 50Ni 80Ni Со-based Fe-based Fe-based
Magnetic induction amplitude, Вm (T) 2.0 1.55 0.74 0.5 0.58 1.56 1.16
Coercitive force, Hc(Oe) 0.5 0.15 0.03 0.1 0.005 0.03 0.01
Initial permeability, μi 1500 6000 40000 3000 60000 5000 70000
Initial permeability, μm 20000 60000 200000 6000 1000000 50000 600000
Resistivity, ρ (μОhm/sm) 50 30 60 1000000 120 130 130
Температура Кюри, Тc (°C) 750 500 500 1000000 120 130 130
Curie temperature, Тх (°C) 530 550 515
Max. operating temterature, Т (°C) 100 90 150 180
Optimal frequency range, f (kHz) 0...1 0...1 0...10 0...10 10... 10...100000 10...100000

Series of materials manufactured by MSTATOR and based on amorphous and nanocrystalline alloys are shown in the Table 2.

Table 2 - Series of materials produced by MSTATOR
MSTATOR
(Russia, Borovichi)
AMAG
(amorphous)
AMAG170, AMAG172, AMAG179, AMAG180, AMAG183, AMAG186А, AMAG186В, AMAG186С, AMAG202, AMAG223, AMAG225, AMAG245, AMAG254, AMAG321, AMAG324, AMAG492
AMAG
(nanocrystalline)
AMAG200, AMAG200С, AMAG201, AMAG204, AMAG211

Properties of amorphous AMAG ribbons produced by MSTATOR

Currently, magnetic amorphous alloys combining improved magnetic and mechanical properties are widely applied. These alloys have a flat narrow hysteresis loop. The feature of the soft magnetic amorphous alloy in comparison with the crystalline one is high (about 20%) content of nonmagnetic elements such as boron, silicon, carbon, phosphorus, and so on which are necessary to maintain the amorphous structure.The presence of these elements decreases maximal values of saturation induction in amorphous alloys The presence of these elements reduces the maximum saturation induction of amorphous alloys comparing to those of a crystalline alloys and increases the temperature coefficient of magnetic properties. These elements increase the electrical resistance,the hardness, strength and corrosion resistance of amorphous alloys.

Tables 3, 4 и 5 show characteristics of amorphous ribbons (on the base of Co, FE-Ni, Fe, Fe-Co) produced by MSTATOR. The data are represented taking into account the corresponding thermomagnetic treatment .

Table 3 - Characteristics of amorphous ribbons based on cobalt
Table 3 - Characteristics of amorphous ribbons based on cobalt
Alloys properties AMAG186С AMAG186В AMAG186А AMAG183 AMAG180 AMAG179 AMAG172 AMAG170
Saturation induction B10, Т 1.0 0.9 0.85 0.75 0.68 0.66 0.60 0.55
Coercitive force Hc, А/m 4.0 2.0 1.6 1.2 0.24 0.24 0.24 0.16
Relative permeability μ at frequency 10kHz 1400 2200 3300 10000 35000 50000 70000 120000
Max. permeability μmax, ×10³ 500 800 1000 1200
Specific loss P, W/kg @ 0.2 Т at frequency:10 kHz (100 kHz) 1.5÷2.0
(50÷60)
1.5÷2.0
(45÷55)
1.5÷2.0
(35÷45)
1.5÷2.0
(30÷40)
1.0÷1.5
(20÷30)
1.0÷1.5
(20÷30)
1.0÷1.5
(20÷25)
0.5÷1.0
(20÷25)
Crystallization temperature Тcr..,°С 450 470 485 515 505 510 520 530
Curie temperature Тc.,°С ≥Tc 430 380 350 275 265 235 200
Density γ, g/sm³ 7.9 7.85 7.8 7.7 7.8 7.8 7.7 7.7
Squareness ratio, no more than* 0.02 0.03 0.03 0.05 0.05 0.05 0.10 0.20
Squareness ratio of hysteresis loop , at least ** 0.95 0.95 0.95 0.9 0.9 0.9 0.9 0.9
Saturation magnetostriction λs, x 10-6 0.05 0.05 0.05 1.0 0.1 0.2 -0.1 0.1
* thermal treatment in transverse magnetic field ** thermal treatment in longitudinal magnetic field
Table 4 - Characteristics of Fe-Ni -based ribbons
Characteristics of Fe-Ni -based ribbons
Alloys properties AMAG202 AMAG223 AMAG225 AMAG245 AMAG254
Saturation induction B10, T 1.4 1.32 1.10 0.83 0.83
Squareness ratio, no more than 0.1 0.03 0.05 0.10 0.05
Squareness ratio, at least 0.1 0.03 0.05 0.10 0.05
Coercitive force, Hc, А/m 4.0 5.0 3.2 1.5 8.0
Permeability μ at frequency 10 kHz 5000 1800 6000 8000 1500
Crystallization temperature Тcr..,°С 520 425 485 480 400
Curie temperature Тc.,°С 380 ≥Tcr. 390 290 ≥Tcr.
Density γ, g/sm³ 7.3 7.4 7.4 7.5 7.9
AMAG225 alloy is applied for manufacturing of low-temperature (IR) electric heaters. Resistivity is ρ = 1.3 µOhm×m. Nominal resistivity of a ribbon (with a width 10mm and a length 1 m) is 8.5 ± 1.0 Ohm. AMAG254 alloy is used in acoustomagnetic anti-theft systems sensors.
Table 5 - Characteristics of amorphous Fe-based and Fe-Co-based ribbons
Table 5 - Characteristics of amorphous Fe-based and Fe-Co-based ribbons
Alloys properties AMAG321 AMAG324 AMAG492
Saturation induction Bs, Т 1.80 1.55 1.56
Squareness ratio, no more than 0.25 0.03 0.20
Coercitive force, Hc, А/m 30.0 4.0 8.0
Permeability μ at frequency 10 kHz 300 1700 5000
Crystallization temperature Тcr..,°С 400 520 500
Curie temperature Тc.,°С ≥Tкр. ≥Tкр. 380
Density γ, g/sm³ 7.6 7.6 7.4

Properties of nanocrystalline AMAG ribbons produced by MSTATOR

Alloys with a crystalline structure based on Si and Fe are characterized by high saturation induction (1.2 Т), good thermal stability in a wide temperature range from -60 to 180°С. New nanocrystalline AMAG series material has improved characteristics when operating in a high frequency band, and it is comparable in performance to amorphous cobalt-based alloys, but has a lower cost. The regulation of the material's functional properties (the shape of the hysteresis loop, the permeability level, the coefficient of squareness, specific losses, etc.) can be provided by the parameters of toroid annealing (wound from a ribbon). Table 6 shows the characteristics of manufactured nanocrystalline ribbons taking into account the corresponding thermomagnetic treatment.

Table 6 - Properties of nanocrystalline ribbons
Table 6 - Properties of nanocrystalline ribbons
Alloys properties AMAG -200 AMAG-200С AMAG-201 AMAG-204 AMAG-211
Saturation induction B10s, Т 1.20 1.16 1.2 1.2 1.25
Coercitive force, Hc, А/m 0.8 0.8 1.5 2.0 3.2
Permeability μ at frequency 10 kHz 30000÷80000 50000÷100000 20000÷30000 10000÷15000 3000÷8000
Crystallization temperature Тcr..,°С 515 515 515 515 510
Curie temperature Тc.,°С 570 560
Density γ, g/sm³ 7.3 7.3 7.3 7.4 7.6
Squareness ratio, no more than * 0.1 0.1 0.1 0.05 0.05
Squareness ratio of hysteresis loop, at least** 0.9 0.9
Core specific loss W/kg at @ 0.2 Т and frequencies:
10kHz
100 kHz




1÷1.5
30÷40




1÷1.5
30÷40
Saturation magnetostriction λs,
x 10-6
2.0 0.5 3.0 4.5 8.0

AMAG series application

At present, amorphous and nanocrystalline soft magnetic materials are used in various applications:
  • n telecommunications. ISDN, DSL and PLC transformers and chokes.
  • In electrical industry, replacing of transformer steel by amorphous alloys provides energy savings on eddy currents.
  • In residual current devices (RCD) designed to protect people from electric shock, including application in household electrical equipment. High permeability provides good sensitivity, low threshold and good accuracy.
  • In electric measuring devices : current transformers, watt-hour counters. The using of nanocrystalline materials in current transformers increases the accuracy of measurements, eliminates the dependence on the shape and symmetry of the load current, ensures accuracy class 0.2.
  • In solar generators.
  • In switch-mode power supplies, inverters, AC/DC and DC/DC converters. Due to new materials high reliability, high efficiency, small size and decreased weight, and low noise level are provided.
  • In magnetic amplifier chokes. Small size, low control current, low loss.
In addition, such products can be used in EMC / EMI filters for SMPS, tube amplifiers, audio equipment, electromagnetic and acoustic electromagnetic sensors of anti-theft devices, in cars (seat heating, heated fuel lines, batteries), in construction (heated floors, ceilings, new heating systems), as well as in absorbers of short voltage / current surges (interference suppression magnetic circuits).

 
NORTH-WESTERN LABORATORY: NEWS
 
09.10 19 

LEPCOS invites you to attend the Stand C23 at ChipEXPO 2019 exhibition, which will be held from 16 to 18 October 2019 in Moscow in the Expocentre, in the pavilion "Forum".

chip_expo



26.06 19 
According to the results of 2018 Lepcos has received "best ferrites seller 2018" seal of excellence from TDK company.



18.04 19 
Dear colleagues! We would like to draw your attention to the fact that, since December 2018, the package content of electrolytic capacitors has been changed.



 
 


«North West Laboratory» © 1999—2019

Development & support — Marina Kutuzova