Sintered AlNiCo Magnets 1

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
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)

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