Hard Ferrite Magnets

Sintered ferrite magnets encompass two primary variants: Barium Ferrite and Strontium Ferrite, each featuring different orientations, classified as isotropic and anisotropic. These magnets are crafted through a high-temperature sintering process, akin to the production of ceramics. They exhibit a hard and brittle texture, characteristic of their composition.

 

Over the course of more than five decades, sintered ferrite magnets have undergone significant development to become the most prolifically manufactured permanent magnets globally. Their widespread use spans across numerous industries, including electric motors, magnetic separators, loudspeakers, hearing aids, office supplies, educational tools, and children’s toys.

 

The appeal of sintered ferrite magnets lies in their attractive balance between cost-effectiveness and moderate magnetic performance. This unique combination positions them as versatile and reliable components in various applications, delivering a cost-efficient magnetic solution while satisfying the demands of specific engineering requirements.


Product Detail

Product Tags

Magnetic Properties

Grade

Br

Hcb

Hcj

 (BH)max

Tw

Equivalent

mT

KG

KA/m

KOe

KA/m

KOe

KJ/m3

MGOe

°C

Y10T

200~235

2.0~2.35

125~160

1.57~2.01

210~280

2.64~.52

6.5~9.5

0.8~1.2

≤250

IEC~7/21

Y20

320~380

3.2~3.8

135~190

1.70~2.38

140~195

1.76~2.45

18.0~22.0

2.3~2.8

≤250

 

Y22H

310~360

3.1~3.6

220~250

2.77~3.14

280~320

3.52~4.02

20.0~24.0

2.5~3.0

≤250

IEC~20/28

Y23

320~370

3.2~3.0

170~190

2.14~2.38

190~230

2.39~2.89

20.0~25.5

2.5~3.2

≤250

IEC~20/19

Y25

360~400

3.6~4.0

135~170

1.70~2.14

140~200

1.76~2.51

22.5~28.0

2.8~3.5

≤250

JIS~MPB320

Y26H

360~390

3.6~3.9

220~250

2.77~3.14

225~255

2.83~3.21

23.0~28.0

2.9~3.5

≤250

TDK~FB3X

Y27H

370~400

3.7~4.0

205~250

2.58~3.14

210~255

2.64~3.21

25.0~29.0

3.1~3.7

≤250

IEC~25/22

Y30

370~400

3.7~4.0

175~210

2.2~2.64

180~220

2.64~2.77

26.0~30.0

3.3~3.8

≤250

IEC~26/18

Y30BH

380~390

3.8~3.9

223~235

2.80~2.95

231~245

2.90~3.08

27.0~30.0

3.4~3.7

≤250

 

Y30H-1

380~400

3.8~4.0

230~275

2.89~3.46

235~290

2.95~3.65

27.0~32.5

3.4~4.1

≤250

TDK~FB4B

Y30H-2

395~415

3.95~4.15

275~300

3.46~3.77

310~335

3.90~4.21

28.5~32.5

3.5~4.0

≤250

TDK~FB5H

Y32

400~420

4.0~4.2

160~190

2.01~2.38

165~195

2.07~2.45

30.0~33.5

3.8~4.2

≤250

TDK~FB4A

Y33

410~430

4.1~4.3

220~250

2.77~3.14

225~255

2.83~3.21

31.5~35.0

4.0~4.4

≤250

TDK~FB4X

Y35

400~410

4.00~4.10

175~195

2.20~2.45

180~200

2.26~2.51

30.0~32.0

3.8~4.0

≤250

 

Physical Properties

Hard ferrite magnets are composed of iron and barium or strontium oxides. They conduct magnetic flux well and have a high magnetic permeability. This enables these so-called ceramic magnets to store stronger magnetic fields than iron itself. Hard Ferrite magnets are inherently brittle, and it is highly recommended that they not be utilized as structural elements in any application. Their thermal stability is the poorest of all the magnetic families, but they may be utilized in environments up to 300°C.

Br Temperature Coefficient

-0.2%/℃

Density

4.5~5.1g/cm3

Curie Temperature

450~460℃

Coercivity Temperature Coefficient

0.2~0.5%/℃

Vickers-Hardness

480~580HV

Electrical Resistivity

10-5Ω·cm

Bending Strength

0.05~0.09 kN/m2

Compress Strength

1.3 kN/m2

Tensile Strength

0.02~0.05 kN/m2

Thermal Expansion Coefficient

11~13x10-6/k

Young's Modulus

170 kN/m2

Thermal Conduct Rate

12 W/mK

Max. Working Temp.

350℃

 

 

 

 


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