Product detail

Sintered Ferrite (Hard ferrite magnets) were developed in the 1960s as a low cost alternative to metallic magnets. Even though they exhibit low energy (compared with other permanent magnet materials) and are relatively brittle and hard, Ceramic Magnets (Hard ferrite magnets) have won wide acceptance due to their good resistance to demagnetization, excellent corrosion resistance and low price per pound. In fact, measured by weight, ferrite represents more than 75 percent of the world magnet consumption. It is the first choice for most types of DC motors, magnetic separators, magnetic resonance imaging and automotive sensors.

Besides industrial application, Ceramic Magnets (Hard ferrite magnets) are widely use in Educational area.

Ferrite magnets are manufactured by pressing, sintering, or injection molding. These magnets can be both anisotropic and isotropic. Anisotropic grades are oriented in the manufacturing direction and must be magnetized in the direction of orientation. Isotropic grades are not oriented and can be magnetized in any direction.


Physical property of hard ferrite magnets

Typical Physical Properties
Curie Temperature (°C)	450
Maximum Operating Temperature (°C)	250
Hardness (Hv)	480-580
Density (g/cm3)	4.8 - 4.9
Relative Recoil Permeability (μrec)	1.05 - 1.20
Saturation Field Strength, kOe (kA/m)	10 (800)
Temperature Coefficient of Br (%/°C)	-0.2
Temperature Coefficient of iHc (%/°C)	0.3
Tensile Strength (N/mm)	<100
Transverse Rupture Strength (N/mm)	300

Mostly Used national standard - SJ285-77 permanent ferrite magnet standard

Grade	Br		Hcb		Hcj		BHmax
	kGs	mT	kOe	kA/m	kOe	kA/m	KJ/m3	MGOe
Y10T(=C1)	2.00/2.18	200/218	1.57/1.82	125/145	2.64/3.14	210/250	6.5/8.0	0.8/1.0
Y25	3.60/3.70	360/370	1.70/1.88	135/150	1.76/2.14	140/170	22.5/25.3	2.8/3.2
Y30(=C5)	3.80/3.85	380/385	2.40/2.64	191/210	2.50/2.51	199/220	26.0/28	3.4/3.7
Y30BH	3.80/3.90	380/390	2.80/2.95	223/235	2.90/3.08	231/245	27.0/30.0	3.4/3.7
Y33	4.10/4.20	410/420	2.77/2.95	220/235	2.83/3.01	225/240	31.5/33.0	4.0/4.2
Y35	4.00/4.10	400/410	2.20/2.45	175/195	2.26/2.51	180/200	30.0/32.0	3.8/4.0
C8(=C8A)	3.85/3.90	385/390	2.95/3.20	235/255	3.05/3.33	242/265	27.8/30.0	3.5/3.7
C10	4.00/4.10	400/410	3.62/3.77	288/300	3.51/3.60	280/287	30.4/31.9	3.8/4.0

Delivery time

7-10 Working days