Sintered AlNiCo magnets are manufactured by powder metallurgy technology which similar with other sintered magnets. Its overall magnetic performance is slightly low than cast AlNiCo magnets, thus not commonly used like the latter. Sintered AlNiCo magnets are well adapted for small-sized, thin, light, and complex shaped magnets. Beside high dimensional accuracy and tight tolerance. It also has superior mechanical strength and machinability. Viewing from the production, sintered AlNiCo magnets have higher utilization ratio of material, lower composition segregation and magnetic performance fluctuation compared to the cast AlNiCo magnets.
Manufacturing Process of Sintered AlNiCo Magnets
Magnetic Properties of Sintered AlNiCo Magnets
| Grade | Remanence Br | Coercivity Hcb | Max. Energy Product (BH)max | Temp. Coefficient Tk | Curie Temp. | Max. Operating Temperature | MMPA Equivalent | ||||
| mT | Gs | kA/m | Oe | kJ/m3 | MGOe | %/℃ (Br) | %/℃ (Hcj) | ℃ | ℃ | ||
| FLN8 | 500 | 5000 | 40 | 500 | 9 | 1.13 | -0.02 | -0.03 | 760 | 450 | AlNiCo3 |
| FLNG12 | 700 | 7000 | 48 | 600 | 12.4 | 1.55 | -0.02 | -0.03 | 810 | 450 | AlNiCo2 |
| FLNGT18 | 600 | 6000 | 90 | 1130 | 18 | 2.2 | -0.02 | -0.03 | 860 | 450 | AlNiCo7 |
| FLNG34 | 1200 | 12000 | 48 | 600 | 34 | 4.25 | -0.02 | -0.03 | 890 | 450 | AlNiCo5 |
| FLNG37 | 1250 | 12500 | 48 | 600 | 37 | 4.63 | -0.02 | -0.03 | 890 | 450 | AlNiCo5 |
| FLNGT28 | 1050 | 10500 | 60 | 600 | 28 | 3.5 | -0.02 | -0.03 | 850 | 450 | AlNiCO6 |
| FLNGT38 | 800 | 8000 | 120 | 1500 | 38 | 4.75 | -0.02 | -0.03 | 850 | 450 | AlNiCo8 |
| FLNGT42 | 880 | 8800 | 120 | 1500 | 42 | 5.25 | -0.02 | -0.03 | 820 | 450 | AlNiCo8 |
| FLNGT36J | 700 | 7000 | 140 | 1750 | 33 | 4.13 | -0.02 | -0.03 | 850 | 450 | AlNiCo8HC |
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