Latest High Grade Permanent Ferrite Disc Magnets

March 02, 2024

Model NO.: fdm-018
Material: Sro or Bao and Fe2o3
Color: Black
Trademark: Yuxiang
Transport Package: Neutral Wooden Carton Packing
Specification: ISO9001
Origin: Fujian, China (Mainland)
HS Code: 850511900
Ferrite Disc Magnets

General Description

Ferrite magnets are composed of strontium carbonate and iron oxide. They are charcoal gray in color and usually appear in the forms of discs, rings, blocks, cylinders, and sometimes arcs for motors...

Attributes:

Least expensive material compared to alnico and rare earth magnets
High intrinsic coercive force
Available in simple shapes only due to manufacturing process
Lower service temperature than alnico, greater than rare earth
Finishing requires diamond cutting or grinding wheel
Lower energy product than alnico and rare earth magnets
Most common grades of ceramic are 1, 5 and 8 (1 to 8 possible)
Grade 8 is the strongest ceramic material available...

Applications:

Application ranges include speaker magnets, DC brushless motors, magnetic resonance imaging (MRI), magnetos used on lawn mowers and outboard motors, DC permanent magnet motors (used in cars), separators (separate ferrous material from non-ferrous), magnetic assemblies designed for lifting, holding, retrieving and separating
 
Parameters Mark Unit Value
Recoil Permeability Urce - 1.05-1.3
Curie Temperature Tc °c 460
The temperature of Br aBr  °c -1  -0.2%
 The temperature of Hcj  aHcj   °c -1  0.2-0.5%
 Density  D  g/cm 3  4.5-5.1
 Resistivity  P Ω cm  ≥10 4
 The coefficient of  linear expansion  aR  °c -1  7 -15x  10 -6
 Hardness  HV  - 480-580

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