Fujian Xingyuan Magnetic Materials Co.,Ltd

Sintered AlNiCo Magnet

Sintered AlNiCo Permanent Magnet Alloy

Alnico magnet material is made by alloying aluminum, nickel and cobalt with iron. Some grades also contain copper and/or titanium. The alloying process is casting or sintering. These constituents, the process and the heat treatment needed to optimize magnetic properties produces hard (Rc45) and brittle parts that are best shaped or finished by abrasive grinding. Sintered Alnico magnet, which are also alumium-nickel-cobalt iron alloys, is usually restricted to smaller sizes. it has slightly lower magnetic properties, but better mechanical strength than cast alnico magnet. Sintered Alnico magnet is widely used in all kinds of sensors, meters, controller speedometer and other applications.

Sintered alnico magnets have slightly lower magnetic properties, however they have excellent mechanical properties. Alnico magnets are excellent choices for applications involving vibration and shock as they have good resistance to demagnetization.

Characteristics:

Suitable for small volume magnets with complex shape

Compact crystal, high intensity

Regular shape, precision size

Even elements, stable performance

Suitable for compound magnet

Excellent temperature stability (temp. coefficient of Br is the smallest among all of the other permanent magnets.)

Application:

Inner magnetic voltmeter/ammeter, electronic type power energy measuring instrument, avometer, flow meter

A wide range of magnetic sensor, polarized relay, temperature and pressure controller

Buzzer of mobile phone, hearing aids, mini speaker

Lighter of automobile, odometer of automobile and motorcycle, permanent magnet motor, absorptive appliance

Widely applied in high stability fields, such as aviation, spaceflight and military technology.

Typical Magnetic Performance Range for Sintered Alnico Magnet


Grade
Br
Hc
(BH)max
Tc
Tw
Temp. Coefficient α(Br)
MMPA Equivalent
Remark




mT
KGs
KA/m
Oe
KJ/m3
MGOe
°C
°C
%/°C


FLN8
550
5.5
42
530
9.0
1.13
760
450
-0.022
[S.Alnico3]
Isotropy
FLNG12
700
7
48
600
12.4
1.55
810
450
-0.014
[S.Alnico2]

FLNGT18
580
5.8
90
1130
18.0
2.20
860
450
-0.020
[S.Alnico7]

FLNG34
1100
11
48
600
34.0
4.25
890
450
-0.016
[S.Alnico5]
Anisotropy
FLNGT28
1000
10
56
700
28.0
3.50
850
450
-0.020
[S.Alnico6]

FLNGT38
800
8
120
1500
38.0
4.75
850
450
-0.020
[S.Alnico8]

FLNGT42
850
8.5
120
1500
42
5.25
820
450
-0.020


FLNG33J
680
6.8
140
1750
33.0
4.13
850
450
-0.025
[S.Alnico8HC]


Demagnetization Curve of Sintered AlNiCo Magnet Alloy