Sintered AlNiCo Magnets
Sintered Alnico magnet 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.
Applications of Alnico Magnet ·Separators
·Sensors
·Electron tubes
·Traveling wave tubes
·Radar
·Holding magnets
·Clutches and bearings
·Motors
·Relays
·Controls
·Generators
·Receivers
·Telephones
·Microphones
·Bell ringers
·Loudspeakers
·Cow magnets
·Educational products
·Sensors
·Electron tubes
·Traveling wave tubes
·Radar
·Holding magnets
·Clutches and bearings
·Motors
·Relays
·Controls
·Generators
·Receivers
·Telephones
·Microphones
·Bell ringers
·Loudspeakers
·Cow magnets
·Educational products
Attributes of Alnico Magnet ·Very temperature stable, great for high heat
applications
·Working temperature can reach 550-600 C
·Does not lend itself to conventional machining
(hard and brittle)
·High residual induction and energy product
compared to ceramic material
·Low coercive force compared to ceramic and rare
earth materials (more subject to demagnetization)
applications
·Working temperature can reach 550-600 C
·Does not lend itself to conventional machining
(hard and brittle)
·High residual induction and energy product
compared to ceramic material
·Low coercive force compared to ceramic and rare
earth materials (more subject to demagnetization)
Magnetic properties and physical characteristics
of sintered AINiCo permanent magnets
| Grade | (BH)max KJ/m3 |
Br mT |
Hcb kA/m |
Hcj kA/m |
d g/cm3 |
α(Br) %/K |
Tc ℃ |
Remarks |
| ALNiCo4/1 | 3.2-4.8 | 870-890 | 9-11 | 10-12 | 6.8 | -0.02 | 750 | isotropy |
| ALNiCo8/5 | 8.5-9.5 | 530-620 | 45-50 | 47-52 | 6.8 | -0.02 | 750 | |
| ALNiCo10/5 | 9.5-11 | 630-700 | 48-56 | 50-58 | 6.8 | -0.02 | 780 | |
| ALNiCo12/5 | 11-13 | 700-750 | 50-56 | 53-58 | 7.0 | -0.02 | 800 | |
| ALNiCo14/5 | 13-15 | 730-800 | 47-50 | 50-53 | 7.1 | -0.02 | 790 | |
| ALNiCo14/6 | 14-16 | 620-810 | 56-64 | 58-66 | 7.1 | -0.02 | 790 | |
| ALNiCo14/8 | 14-16 | 550-610 | 75-88 | 80-92 | 7.1 | -0.01 | 850 | |
| ALNiCo18/10 | 16-19 | 570-620 | 92-100 | 99-107 | 7.2 | -0.01 | 860 | |
| ALNiCo35/5 | 35-39 | 1100-1200 | 48-52 | 50-54 | 7.20 | -0.02 | 850 | Anisotropy |
| ALNiCo29/6 | 29-33 | 970-1090 | 58-64 | 60-66 | 7.20 | -0.02 | 860 | |
| ALNiCo32/10 | 33-38 | 770-870 | 90-104 | 94-109 | 7.20 | -0.01 | 860 | |
| ALNiCo33/11 | 33-38 | 700-800 | 107-115 | 111-119 | 7.20 | -0.01 | 860 | |
| ALNiCo39/12 | 39-43 | 830-900 | 115-123 | 119-127 | 7.25 | -0.01 | 860 | |
| ALNiCo44/12 | 44-48 | 900-950 | 119-127 | 124-132 | 7.25 | -0.01 | 860 | |
| ALNiCo37/15 | 37-41 | 700-800 | 143-151 | 150-158 | 7.10 | -0.1 | 870 |
