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Ceramic Magnets

 

Ferrite permanent magnets became commercially available in the mid 1950’s. Ferrite permanent magnets are also commonly known as ceramic magnets, because of the process used to produce them. The raw materials used in the ferrite magnet production are iron oxide, and barium/strontium carbonate. All of these are non-strategic, plentiful available and low in cost. Ferrite, or iron oxide, is mixed with strontium and then milled to a very fine powder. The powder is then mixed with a ceramic binder and pressed into shape. These pressed parts are fired in a tunnel kiln to complete the ceramic process, sintering. The result is a hard and brittle part requiring diamond wheels for grinding to close tolerance. Ceramic magnets will not withstand the mechanical stresses required of structural members. Due to the nature of this material, small cracks, chips, porosity, etc. are common and should be expected but will not interfere with the performance of the magnets. Energy products for ferrite materials range from 1 to 4.5 MGOe and is best suited for environments under 300° C (570° F).

Our suppliers can produce many different shapes and sized of arc magnets.

Ceramic Arc Magnets
Various Arc Magnets

 


 

All of our ceramic magnets are manufactured to rigid magnetic and physical properties that meet or exceed the Standards set by MMPA (U.S.A.), the Magnetic Materials Producers Association of the United States. Our supply partners are ISO-9002 and QS-9000 certified. Every manufacturing process includes thorough quality control.

The raw materials used in the ceramic magnet production are iron oxide, and barium/strontium carbonate. All of these are non-strategic, plentiful available and low in cost. Ceramic magnets are formed by compaction and sintering. The result is a hard and brittle part requiring diamond wheels for grinding to close tolerance. Ceramic magnets will not withstand the mechanical stresses required of structural members.

Magnet Ceramic-1 is non-oriented and isotropic with equal magnetic properties in any direction of magnetization. High-grade ceramic magnets are oriented. They must be magnetized in the direction of orientation, which is the same as the direction of pressing. All magnets are available in variety of shapes and sizes, including round disks, rings, blocks, arc segments, U-shapes, rotors, cylinders, etc. The finished products could be magnetized or un-magnetized as specified.

If you do not find the specific properties which you need in our catalog, please feel free to contact us or send your inquiry and drawing to us. We would design a composition to match your specifications and provide samples for your testing.

 

Magnetic Properties:

Grade Br, Gauss Hc, Oersteds iHc, Oersteds (BH)max, MGOe Equivalent
SIF-1 2000 ~ 2300 1600 ~ 2000 3200 ~ 4000 0.8 ~ 1.1 C-1, FB1A, YBM-3
SIF-5 3800 ~ 4200 2200 ~ 2600 2250 ~ 2650 3.4 ~ 4.0 C-5, FB4A, YBM-1BB
SIF-5D 3800 ~ 4200 3100 ~ 3500 3300 ~ 3700 3.4 ~ 4.0 YBM-2BD
SIF-7 3400 ~ 3800 3200 ~ 3600 4000 ~ 4400 2.7 ~ 3.4 C-7, YBM-2BC, FB4H
SIF-7A 3400 ~ 3800 3050 ~ 3450 4000 ~ 4400 2.5 ~ 3.1
SIF-7B 3600 ~ 4000 3250 ~ 3750 3800 ~ 4200 3.0 ~ 3.6  YBM-2BE
SIF-7C 3600 ~ 4000 3400 ~ 3800 4600 ~ 5000 3.1 ~ 3.5 YBM-2BF
SIF-8 3800 ~ 4200 2800 ~ 3400 2850 ~ 3450 3.5 ~ 4.1 C-8, FB4D, YBM-2B
SIF-8B 4100 ~ 4300 2800 ~ 3200 2850 ~ 3250 4.0 ~ 4.4 YBM-2BB
SIF-8C 4100 ~ 4300 2200 ~ 2500 2350 ~ 2550 4.0 ~ 4.3 FB4N, YBM-2BA
SIF-8D 4200 ~ 4400 3150 ~ 3500 3200 ~ 3600 4.2 ~ 4.4 FB5B, YBM-6BB

Ceramic-5 Properties               > Ceramic-8 Properties

 

Ceramic Block Magnets
Ferrite block magnets

 

ferrite ring magnets
Ferrite Ring Magnets

 

 


 

Ferrite Magnet Production Process

Ferrite_process