Categories
 
 
 
 
Ferrites
 
 
 
 

Ferrite (ceramic) magnets

Hardferrite (ceramic) magnets consist of ca. 80% of iron oxide and 20% of barium (BaO•6Fe2O3) or strontium (SrO•6Fe2O3) oxide. These raw materials are available in big quantities, so  magnets made of them are cost effective. Basic manufacture process is pressing, there are two processes - isotropic ferrite magnets are made applying "dry" process, while anisotropic ferrites are made by "wet" process.

Isotropic magnets have the same magnetic properties in all directions, can  be magnetized easily in any direction, but the energy product is low. Anisotropic magnets are pressed in magnetic field and keep  prefered magnetization direction. Remanence and energy product of anisotropic magnets is much higher than isotropic magnets.

Ferrite magnets are hard, brittle and sensitive to crack. Machining is possible by grinding with diamond tools or cutting by water jet.

Ferrite magnets are corrosion resistant in ambient environment, against weak acids, oils and solvents. Ferrites are not sensitive to external demagnetizing fields, magnetic properties remain constant in wide temperature range from -40°C to +250°C. Small cracks and stripping is normal for ferrite magnets and this wearing does not have any effect on magnetic properties, functionality and holding force.

 

Table of magnetic properties of ferrite magnets:

Material grade

Remanence

Br (T)

Coercivity Hc (kA/m)

Max. energy product

(BxH)max (kJ/m3)

Max. working temp.

Tw (°C)

Normal Hcb Intrinsic Hci
izotrop 0.20 - 0.24 125 - 160 210 - 280 6.5 - 9.5 <= 250
C5 0.38 191 199 27.0 <= 250
C8 0.385 235 242 27.8 <= 250
C8B 0.42 232 236 32.8 <= 250
C10 0.4 280 288 30.4 <= 250
Y30BH 0.38 - 0.39 223 - 235 231 - 245 27.0 - 30.0 <= 250
Y35 0.40 - 0.41 175 - 195 180 - 200 30.0 - 32.0 <= 250

 

 

Other magnetic and mechanic parameters of ferrite magnets:

Temp. coefficient of Br (%/°C) Temp. coefficient of Hci (%/°C) Magnetizing field (kA/m) Curie temp. (°C) Density (g/cm3) Hardness (Hv)
- 0.2 + 0.4 > 800 450 4.9 500

 

 
 

Ferrites

Order by: Ascending order
Display #:

 
Ferrite disc, anisotropic
Sklad

Ferrite disc, anisotropic

Magnetized through thickness H (axially), maximum working temperature + 250 ° C
from 0,23 €
Ferrite block, anisotropic, magnetized through width
Sklad

Ferrite block, anisotropic, magnetized through width

magnetized through width B, maximum working temperature +250°C
Ferrite ring, anisotropic
Sklad

Ferrite ring, anisotropic

Magnetized through thickness H (axially), maximum working temperature + 250 ° C
from 0,23 €
Ferrite ring with 90° counterbore, anisotropic
Sklad

Ferrite ring with 90° counterbore, anisotropic

magnetized through thickness H, maximum working temperature +250°C
from 1,58 €
Ferrite block, anisotropic
ACTION

Ferrite block, anisotropic

magnetized through thickness H, maximum working temperature +250°C
0,30 € from 0,19 €
Office magnets
ACTION

Office magnets

isotropic, one-side multipolar magnetization, 5 colours
0,20 €
Office magnet, ferrite, round, white
Sklad

Office magnet, ferrite, round, white

Office magnets with ferrite (Fe) magnet
from 0,43 €
Office magnet, ferrite, round, yellow
Sklad

Office magnet, ferrite, round, yellow

Office magnets with ferrite (Fe) magnet
from 0,43 €
Office magnet, ferrite, round, red
Sklad

Office magnet, ferrite, round, red

Office magnets with ferrite (Fe) magnet
from 0,43 €
Office magnet, ferrite, round, blue
Sklad

Office magnet, ferrite, round, blue

Office magnets with ferrite (Fe) magnet
from 0,43 €
Office magnet, ferrite, round, green
Sklad

Office magnet, ferrite, round, green

Office magnets with ferrite (Fe) magnet
from 0,43 €
Office magnet, ferrite, round, orange
Sklad

Office magnet, ferrite, round, orange

Office magnets with ferrite (Fe) magnet
from 0,43 €
Office magnet, ferrite, round, black
Sklad

Office magnet, ferrite, round, black

Office magnets with ferrite (Fe) magnet
from 0,43 €
Office magnet, ferrite, square, white
Sklad

Office magnet, ferrite, square, white

Office magnets with ferrite (Fe) magnet
from 0,50 €
Office magnet, ferrite, square, yellow
Sklad

Office magnet, ferrite, square, yellow

Office magnets with ferrite (Fe) magnet
from 0,50 €
Office magnet, ferrite, square, orange
Sklad

Office magnet, ferrite, square, orange

Office magnets with ferrite (Fe) magnet
from 0,50 €
Office magnet, ferrite, square, red
Sklad

Office magnet, ferrite, square, red

Office magnets with ferrite (Fe) magnet
from 0,50 €
Office magnet, ferrite, square, green
Sklad

Office magnet, ferrite, square, green

Office magnets with ferrite (Fe) magnet
from 0,50 €
Office magnet, ferrite, square, blue
Sklad

Office magnet, ferrite, square, blue

Office magnets with ferrite (Fe) magnet
from 0,50 €

 
 
 
 
 
 
 
 
 
 
 
Full (Desktop) version