Ceramic/Ferrite Magnets (Isotropic/Anisotropic)

Ferrite magnets, also known as ceramic magnets, can be obtained with a process of sintering.
Dry pressing is used to produce both isotropic and anisotropic ferrite magnets, while wet pressing is used to produce only anisotropic magnets.
They are characterized by low permeability and high coercivity.
They are very resistant to high temperatures and are also inexpensive.

Magnetic properties:

		Ferrite 10	Ferrite 20	Ferrite 25	Ferrite 30	Ferrite 30BH (C8)	Ferrite 33H	Ferrite 35H
Br	mT	200-235	330-380	350-400	380-400	> 395	370-390	390-410
	KGs	2.0-2.3	3.3-3.8	3.5-4.0	3.8-4.0	> 3.95	3.7-3.9	3.9-4.1
bHc	KA/m	135-160	128-160	144-192	160-192	> 235	208-240	240-255
	KOe	1.6-2.0	1.6-2.0	1.8-2.4	2.0-2.4	> 2.95	2.6-3.0	3.0-3.2
JHc	KA/m	210-250	136-168	152-200	164-196	> 243	216-248	248-272
	KOe	2.8-3.1	1.7-2.1	1.9-2.5	2.05-2.4	> 3.05	2.7-3.1	3.1-3.4
(BH)max	KJ/m3	7.1-9.0	21-24	22.3-25.5	25.5-29.5	> 27.9	25.5-29	28.5-32
	MGOe	0.9-1.1	2.6-3.0	2.8-3.2	3.2-3.7	> 3.5	3.2-3.6	3.6-4.0

Physical properties:

	Parameters	Unit	Value	Note
Permeability	µ rec	Gs/Oe	1.05 - 1.3
Curie Temperature	Tc	°C	> 450
Temperature coefficient of induction	alfa (Br)	°C-1	-0.2%	0~100°C
Temperature coefficient of coercivity	alfa (Hcj)	°C-1	-0.2 - 0.5%	0~100°C
Density	d	g/cm3	4.6 - 5.0
Electrical resistivity	p	Ohm cm	>104
Coefficient of thermal expansion	alfa	°C-1	7 - 15x10
Vickers Hardness	HV		380 - 580