Ferrite Magnets Overview

Ferrite Magnets Overview

Ceramic magnets are permanent magnets made up of a composite of iron oxide and barium/strontium carbonate. Through pressing and sintering ceramic magnets are made. These magnets are also made in different grades. They are widely used magnets with good magnetic strength and resistance to demagnetization. The color of ceramic magnet is charcoal gray and they normally appear in the forms of discs, rings, blocks etc.

Ferrite Magnets Overview

Ferrite Magnets Features

Since the ceramic refrigerator magnets are hard and brittle in nature therefore for their finishing they require diamond cutting or cutting wheel.
They can acquire only simple shapes.
These magnets have excellent intrinsic coercive force.
As compare to other rare earth and alnico magnets they are less expensive.
They are available in different grades like 1, 5, 8 of which grade 8 is the strongest.
Ceramic magnets have low service temperature as compared to rare earth magnets.

Ferrite Magnets Applications

Ceramic Refrigerator Magnets
DC permanent magnet motors
DC brushless motors
Speaker magnets
Magnetic resonance imaging
Separators that is it separates ferrous material from non-ferrous materials
In magnetic assemblies meant for lifting, holding, retrieving, and separating
Food processing industries

Magnetic Properties

Grade	Remanence(Br)		Coercivity Force(Hcb)		Intrinsic Coercive Force(Hcj)		Max. Energy Product(BHmax)		Maximum Operating Temp.
Grade	mT	kGs	kA/m	kOe	kA/m	kOe	kJ/m3	MGOe	Maximum Operating Temp.
Y10T	≥200	≥2000	≥125	≥1600	≥210	≥2600	≥6.5	≥0.8	250 ℃
Y20	≥360	≥3600	≥135	≥1700	≥140	≥1760	≥20.0	≥2.5	250 ℃
Y25	≥380	≥3800	≥144	≥1800	≥150	≥1880	≥24.0	≥3.0	250 ℃
Y30	≥390	≥3900	≥184	≥2300	≥188	≥2350	≥27.6	≥3.4	250 ℃
Y30BH	≥390	≥3900	≥240	≥3000	≥256	≥3200	≥27.6	≥3.4	250 ℃
Y35	≥410	≥4100	≥208	≥2600	≥212	≥2660	≥30.4	≥3.8	250 ℃

Ferrite Magnets Magnetizing

For magnetization of ceramic ferrite magnets, moderate magnetizing field is necessary. Normally it is desirable to magnetize the magnet with a mild steel element such as a motor housing or backing-plate. The anisotropic ceramic magnets results in a single direction of magnetization.

Ferrite Magnets Machining

The ceramic ferrite magnets are brittle hence it is necessary that special care and attention must be taken while machining. Normally diamond tools and some abrasive are used for the fabrication of this magnet. Once the magnet is fabricated, it is magnetized.

Sintered Ferrite magnets are used in many fields, and is manufactured by powder metallurgy. Properties include isotropy and anisotropy with Ba and Sr. This permanent magnet has difficult demagnetization, is rust resistant, and can work at 250℃. Ferrite is rigid and crisp, which can be cut and machined using diamond, dies are made with steel alloy.
The sintered hard ferrite magnets are available in isotropic magnet and anisotropic magnet.

The sintered ferrite magnet has high hardness. It means that can only used diamond tools cutting, grinding techniques can be used to manufacture these products. Attention is required during production & transportation due to their brittle nature.

Application field
The sintered ferrites have widely applications due to their low cost and simple manufacturing process; The applications include permanent motors, DC motor, loudspeakers, reed switch operation, magnetic separator assemblies and holding devices etc.

2-pole Magnetizing Ferrite Magnetic Ring

2-pole Magnetizing Ferrite Magnetic Ring, Ferrite Sintered Magnet Ring 2 Poles, Anisotropic Ceramic Ring Magnet, Permanet Ferrite Multip-Poles Magnet, Hard Ferrite Ring Motor Magnet 2-pole Magnetizing Ferrite Magnetic Ring Specification: Item No. MP-FMR2P Series, Multip-Poles: 2-pole, Ferrite plane 2-pole magnetic ring size D9.6*d6*3.5 1)Material: Low cost magnetic material, ferric oxide, barium and strontium. ( briefly,BaO or […]

Multipole Sensor Magnet for Encoder Linear Rotary

Multipole Sensor Magnet for Encoder Linear Rotary, Multipole Ferrite Linear Sensor Magnet, Encoder Linear Rotary Isotropic ferrite ring magnets, Sintered Ferrite Multi-Poled Radial Ring Sensor Magnets, isotropic & anisotropic magnets Multipole Sensor Magnet for Encoder Linear Rotary Encoder Magnet, Sensor Permanent Magnet, Position Sensor Magnet, Magnet for Linear / Rotary Position Sensor Sensor Magnet – […]

Isotropic Sintered Ferrite Magnets for Stepper Motor

Isotropic Sintered Ferrite Magnets for Stepper Motor, Permanent Multipole Ferrite Magnet Rings for Stepping Motor, Permanent Ceramic Multipole Magnet Rings Ferrite Sintered Magnet, Stepping Motor Hard Ferrite Isotropic Magnets Sintered Ferrite Permanent Multipole Magnet Rings for Stepping Motor Description The Permanent ferrite magnet is made of SrO or BaO and Fe2O3 by ceramic processing technology.The […]

Sintered Ferrite Permanent Multipole Magnet Rings for Stepping Motor

Sintered Ferrite Permanent Multipole Magnet Rings for Stepping Motor, Permanent Ceramic Multipole Magnet Rings Ferrite Sintered Magnet, Stepping Motor Hard Ferrite Isotropic Magnets Sintered Ferrite Permanent Multipole Magnet Rings for Stepping Motor Description The Permanent ferrite magnet is made of SrO or BaO and Fe2O3 by ceramic processing technology.The texture is relatively hard, brittle material.According […]