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 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.
	mT	kGs	kA/m	kOe	kA/m	kOe	kJ/m3	MGOe
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 ℃

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.

Anisotropic Injected Bonded Magnets

Anisotropic Injected Bonded Magnets, Bonded NdFeB Anisotropic Radial Ring Magnet, Anisotropic Thermo-elastomer & thermo-plastic resin magnets, anisotropic neodymium unipolar and multipolar ring PLASTIC magnets Anisotropic Injected Bonded Magnets Item No. AIBM-01 Format: The mechanical and magnetic values vary depending on the material used. The magnet is BLACK epoxy coated. The materials used in injected magnets are […]

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Anisotropic Compression Moulding Bonded Magnets

Anisotropic Compression Moulding Bonded Magnets, Bonded NdFeB Anisotropic Radial Ring Magnet, Anisotropic Thermo-elastomer & thermo-plastic resin magnets, anisotropic radially unipolar and multipolar ring NdFeB PLASTIC magnets Anisotropic Compression Moulding Bonded Magnets Item No. ABNM-12 Format: Any other dimensions can be supplied to order. The ring is BLACK epoxy coated. Maximum working temperature: 80ºC Observations: This […]

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Bonded NdFeB Anisotropic Radial Ring Magnet

Bonded NdFeB Anisotropic Radial Ring Magnet, Compression Bonded Anisotropic Magnets, Anisotropic Thermo-elastomer & thermo-plastic resin magnets, Plastic Compression Moulding Bonded Neo Magnets, anisotropic radially unipolar and multipolar ring NdFeB PLASTIC magnets Bonded NdFeB Anisotropic Radial Ring Magnet Item No. ABNM-11 Format: Any other dimensions can be supplied to order. The ring is BLACK epoxy coated. […]

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