Permanent Ring Ferrite Magnets

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Permanent Ring Ferrite Magnets, Sintered Ferrite Strontium Anisotropic Ferrite Ring Magnets, Ceramic Ring Speaker Magnets, Sintered Hard Ferrite Permanent Ring Magnets China Factory

Permanent Ring Ferrite Magnets
Material SrO OR BaO and Fe2o3
Color Black
Standard Enterprise standard
Grade Y10T/Y25/Y30/Y35H-1/Y35H-2/Y35h-3/Y35H-4/Y38B/Y38H/Y40E/Y40B/Y45E/Y45B
Shape Ring,block,disc,bar and so on
Application Motors,Sperkers,Toys,Crafts,etc.
Size According to customers’ request

Cermaic magnets (Ferrite magnets), sometimes referred to as ceramic because of their production process, are the least expensive class of permanent magnet materials. This material became commercially available in the mid 1950s, and has since found its way into countless applications including arc shaped magnets for motors, magnetic chucks, and magnetic tools.

The raw material, iron oxide, for these magnets is mixed with either strontium or barium and milled down to a fine powdered form. The powder is then mixed with a ceramic binder and magnets are produced through a compression or extrusion molding technique that is followed by a sintering process. The nature of the manufacturing process results in a product that frequently contains imperfections such as cracks, porosity, chips, etc. Fortunately, these imperfections rarely interfere with a magnet’s performance.

To enhance a ceramic magnet’s performance, the ferrite compound may be biased by a magnetic field during the pressing process. This biasing induces a preferred direction of magnetization within the magnet, significantly reducing its performance in any other orientation. Consequently, ceramic magnets are available in both oriented (anisotropic) and non-oriented (isotropic) grades. Because of its lower magnetic properties, the isotropic grade of ferrite, ceramic 1, is typically utilized where complex magnetization patterns are required, and in process biasing would be cost prohibitive. Permanent Ring Ferrite Magnets, waterproof plastic magnetic hook

Magnetic Properties of Sintered Hard Permanent Ring Ferrite Magnets

Grade	Br		HcB		Hcj		(BH)max		TK(Br)%/K		TK(Hcj)%/K	Max Temp	MMPA
Grade	KGs	mT	kOe	Ka/m	kOe	Ka/m	MGOe	Kj/m³				Max Temp	Equivalents
Y10T	2.00-2.18	200-218	1.57-1.82	125-145	2.64-3.14	210-250	0.8-1.0	6.5-8.0	-0.2	0.3		250	C1
Y25	3.60-3.70	360-370	1.70-1.88	135-150	1.76-2.14	140-170	2.8-3.2	22.5-25.3	-0.2	0.3		250
Y30	3.80-3.90	380-390	2.40-2.64	191-210	2.50-2.51	199-220	3.4-3.7	27.0-30.0	-0.2	0.3		250
Y33	4.00-4.10	400-410	2.20-2.45	175-195	2.26-2.51	180-200	3.8-4.0	30.0-31.5	-0.2	0.3		250	C5
Y35	4.10-4.20	410-420	2.77-2.95	220-235	2.83-3.01	225-240	4.0-4.2	31.5-33.0	-0.2	0.3		250
Y30BH	3.80-3.90	380-390	2.80-2.95	223-235	2.90-3.08	231-245	3.4-3.7	27.0-30.0	-0.2	0.3		250	C8
Y33BH	4.00-4.10	400-410	3.62-3.77	288-300	3.51-3.60	280-287	3.8-4.0	30.4-31.5	-0.2	0.3			C8