Simag

Sintered AlNiCo Magnets

Similarly as cast AlNiCo magnets sintered AlNiCo magnets have also been part of Magneti Ljubljana production for decades. Market proven proficiency in production of this type of magnets ensures fulfilment of any customer’s specific requirements. Sintered AlNiCo magnets are prepared by compacting powder mixtures with defined chemical composition and grain size distribution in a press and then sintering in vacuum sintering furnaces.

simag

Sintered AlNiCo advantages

HIGH TEMPERATURE

WORKING POINT

GOOD CORROSIVE

RESISTANCE

GOOD LONG TERM AND

TEMPERATURE STABILITY

PHYSICAL PROPERTIES

Characteristic [Unit] Value
Density [g/cm3] 7,2
Elasticity Modulus [kN/mm2] 100-200
Bending Strength [N/mm2] 250-600
Compression Strength [N/mm2] 300-400
Hardness [HRc] 55
Specific electrical resistance [μΩcm] 45-65
Specific heat [J/kgK] 300
Specific thermal conductivity [W/mK] 12
Curie temperature [°C] 820-890
Temperature Coefficient—TK Br [%/K] -0,2
Required magnetising strenght [kA/m] 300

MAGNETIC PROPERTIES

LIMAG
Typical values
Remanence Br
[T]
Coercivity HcB
[kA/m]
Instrinsic Coercivity
HcJ [kA/m]
Energy product (BH)max
[kJ/m3]
Limag 250 0,62 85 87 18
Limag 400 K 1,01 60 62 32
Limag 500 1,25 50 52 38
Limag 1500 1,85 124 126 38
Limag 1800 0,75 150 155 43

– various types of sensors in automotive industry
– DC motors
– Mechanical kWh meters
– Safety switches, etc.

Due to slightly lower physical density, sintered AlNiCo magnets in general have slightly lower magnetic properties comparing with the same grade of Cast Alnico magnets. However, based on diff erent production process they can be manufactured in more complex forms and from economical point of view, sintering technology is better suited for manufacturing smaller sized AlNiCo magnets. Within range of AlNiCo magnets magnetic properties can be adjusted according to customer’s requirements, taking into account the general limitations.

 

They can be manufactured to attain wide range of magnetic properties which can meet various specific requirements based on various fields of applications, such as:

catalogue magneti pdf

Product Catalog 2018

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