The Alnico magnets (composed predominantly of aluminum, nickel, and cobalt with minor amounts of other elements including titanium and copper) is manufactured through either a Casting or Sintering process. Compared to modern materials alnico has a low coercivity. The main advantage of alnico is the very low temperature coefficient and the wide temperature range from -273 °C to more than + 400 °C for practical use.
Alnico is very hard and brittle. Machining or drilling cannot therefore be accomplished by ordinary methods. Holes are usually cored in at the foundry. Magnets are cast or sintered as closely as possible to required size so that abrasive grinding to finish dimensions and tolerances is minimized.
Magnetic Property
| Characteristics | Br | Hcb | Hcj | (BH)max | d | α(Br) | Curie point | Remarks |
|---|---|---|---|---|---|---|---|---|
| MODEL | mT(kG) | kA/m(kOe) | kA/m(kOe) | kJ/m³(MGOe) | g/cm³ | %/K | ℃ | Isotropic |
| DSAlNiCo4/1 | 870-890.(8.7-8.9) | 9-11.(0.11-0.14) | 10-12.(0.13-0.15) | 3.2-4.8.(0.40-0.60) | 6.8 | -0.02 | 750 | |
| DSAlNiCo8/5 | 530-620.(5.3-6.2) | 45-50.(0.57-0.63) | 47-52.(0.59-0.65) | 8.5-9.5.(1.07-1.19) | 6.8 | -0.02 | 750 | |
| DSAlNiCo10/5 | 630-700.(6.3-7.0) | 48-56.(0.60-0.70) | 50-58.(0.63-0.73) | 9.5-11.(1.19-1.38) | 6.8 | -0.02 | 780 | |
| DSAlNiCo12/5 | 700-750,(7.0-7.5) | 50-56,(0.62-0.70) | 53-58,(0.66-0.73) | 11-13.(1.38-1.63) | 7 | -0.02 | 800 | |
| DSAlNiCo14/5 | 730-800(7.3-8.0) | 47-50(0.59-0.63) | 50-53(0.63-0.67) | 13-15(1.63-1.88) | 7.1 | -0.02 | 790 | |
| DSAlNiCo14/6 | 620-810(6.2-8.1) | 56-64(0.70-0.81) | 58-66(0.73-0.83) | 14-16(1.76-2.00) | 7.1 | -0.02 | 790 | |
| DSAlNiCo14/8 | 550-610(5.5-6.1) | 75-88(0.94-1.11) | 80-92(1.00-1.16) | 14-16(1.76-2.00) | 7.1 | -0.01 | 850 | |
| DSAlNiCo18/10 | 570-620(5.7-6.2) | 92-100(1.16-1.26) | 99-107(1.24-1.34) | 16-19(2.00-2.39) | 7.2 | -0.01 | 860 | |
| DSAlNiCo29/6 | 970-1200(9.7-12) | 58-64(0.73-0.80) | 60-66(0.75-0.83) | 29-33(3.64-4.15) | 7.2 | -0.02 | 860 | Anisotropic |
| DSAlNiCo30/6 | 1000-1100(10-11) | 58-64(0.73-0.80) | 60-66(0.75-0.83) | 30-34(3.77-4.27) | 7.2 | -0.02 | 860 | |
| DSAlNiCo42/10 | 950-1100(9.5-11) | 100-110(1.26-1.38) | 104-114(1.30-1.43) | 42-46(5.27-5.77) | 7.2 | -0.01 | 860 | |
| DSAlNiCo33/11 | 700-800(7-8) | 107-115(1.34-1.45) | 111-119(1.39-1.50) | 33-38(4.14-4.77) | 7.2 | -0.01 | 860 | |
| DSANiCo35/5 | 1100-1200(11-12) | 48-52(0.60-0.65) | 50-54(0.63-0.68) | 35-39(4.40-4.90) | 7.2 | -0.02 | 850 | |
| DSAlNiCo37/15 | 700-800(7.0-8.0) | 140-147(1.76-1.85) | 150-158(1.88-1.98) | 37-41(4.65-5.15) | 7.2 | -0.01 | 870 | |
| DSAlNiCo39/12 | 830-900(8.3-9.0) | 115-123(1.45-1.54) | 119-127(1.50-1.60) | 39-43(4.90-5.40) | 7.25 | -0.01 | 860 | |
| DSAlNiCo44/12 | 900-950(9-9.5) | 119-127(1.50-1.60) | 124-132(1.56-1.66) | 44-48(5.53-6.03) | 7.25 | -0.01 | 860 | |
| DSAlNiCo40/15 | 750-850(7.5-8.5) | 143-151(1.80-1.90) | 155-163(1.95-2.05) | 40-48(5.02-6.03) | 7.2 | -0.01 | 870 | |
| DSAlNiCo44/15 | 800-880(8.0-8.8) | 148-160(1.86-2.00) | 155-163(1.95-2.05) | 44-48(5.53-6.03) | 7.2 | -0.01 | 870 |
Moulding and Injection Bonded Magnet
1: High performance, isotropic.
2: Magnetization can be in any direction, suitable for radial and axial multipolar magnetization.
3: Exact size.
4: Versatile shapes and specification.
5: Advanced surface treatment technology, effectively protect.
6: Integrated forming.
Application:
- Magnetic stators for fractional horsepower DC motors
- Muti-pole magnetic rotors for brushless DC and stepper motors
- Magnetic actuators for a diverse range of magnetic switches and solenoids
- Sensors for automotive and industrial applications
Magnetic Property
| Grade | Br | Hcj | Hcb | (BH)max | ||||
| T | kGs | KA/m | kOe | KA/m | kOe | KJ/m³ | MGOe | |
| DSNP-6 | 0.46-0.54 | 4.6-5.4 | 640-720 | 8.0-9.0 | 272-320 | 3.4-4.0 | 32-48 | 4.0-6.0 |
| DSNP-8 | 0.54-0.64 | 5.4-6.4 | 640-920 | 8.0-11.5 | 320-440 | 4.0-5.5 | 48-64 | 6.0-8.0 |
| DSNP-8H | 0.58-0.62 | 5.8-6.2 | 1000-1400 | 12.5-17.5 | 400-440 | 5.0-5.5 | 56-72 | 7.0-9.0 |
| DSNP-10 | 0.62-0.72 | 6.2-7.2 | 640-920 | 8.0-11.5 | 360-460 | 4.5-5.8 | 64-80 | 8.0-10.0 |
| DSNP-12 | 0.69-0.76 | 6.9-7.6 | 700-880 | 8.8-11.0 | 400-480 | 5.0-6.0 | 80-96 | 10.0-12.0 |