What is Hard Ferrite Magnet?
Ferrite magnets sometimes referred to as ceramic because of their production process, are the least expensive class of permanent magnet materials. The material became commercially available in the mid-1950’s and has since found its way into countless applications including arc-shaped magnets for motors, magnetic chucks, and magnetic tools.
Ceramic magnets are very resistant to corrosion. Coatings can be applied for cosmetic reasons or to reduce the fine, ferrite powder which is associated with Ceramic magnets. A Sinda team member will assist with the selection of best surface treatment option for your Ceramic application.
Ceramic (Ferrite) magnets are susceptible to demagnetization when exposed to temperature extremes. There are grades which have better resistance to high and low temperatures, but several factors will dictate the performance of the Ceramic magnet. One of the most pertinent variables is the geometry of the magnet or magnetic circuit. Magnets which are thin relative to their pole cross-section (Magnetic Length / Pole Area) will demagnetize easier than magnets which are thick. Magnetic geometries utilizing backing plates, yokes, or return path structures will respond better to temperature changes. The maximum recommended operating temperatures listed on the Ceramic magnetic characteristics page does not take into account all geometry conditions.
|
Grade
|
Max Energy Product
BH(max) |
Remanence Br
|
Coercive Force Hcb
|
Intrinstic Coercive Force Hcj
|
|
kJ/m3(MGOe)
|
mT(KGs)
|
kA/m (kOe)
|
kA/m (KOe)
|
|
|
Y10T
|
6.5~9.5(0.8~1.2)
|
200~235(2.0~2.35)
|
125~160(1.57~2.01)
|
210~280(2.64~3.52)
|
|
Y20
|
18.0~22.0(2.3~2.8)
|
320~380(3.2~3.8)
|
135~190(1.70~2.38)
|
140~195(1.76~2.45)
|
|
Y22H
|
20.0~24.0(2.5~3.0)
|
310~360(3.1~3.6)
|
220~250(2.77~3.14)
|
280~320(3.52~4.02)
|
|
Y23
|
20.0~25.5(2.5~3.2)
|
320~370 (3.2~3.7)
|
170~190(2.14~2.38)
|
190~230(2.39~2.89)
|
|
Y25
|
22.5~28.0(2.8~3.5)
|
360~400 (3.6~4.0)
|
135~170(1.70~2.14)
|
140~200(1.76~2.51)
|
|
Y26H
|
23.0~28.0(2.9~3.5)
|
360~390 (3.6~3.9)
|
220~250(2.77~3.14)
|
225~255(2.38~3.21)
|
|
Y27H
|
25.0~29.0(3.1~3.7)
|
370~400 (3.7~4.0)
|
205~250(2.58~3.14)
|
210~255(2.64~3.21)
|
|
Y30
|
26.0~30.0(3.3~3.8)
|
370~400 (3.7~4.0)
|
175~210(2.20~2.64)
|
180~220(2.26~2.77)
|
|
Y30BH
|
27.0~30.0(3.4~3.7)
|
380~390 (3.8~3.9)
|
223~235(2.80~2.95)
|
231~245(2.90~3.08)
|
|
Y30~1
|
27.0~32.0(3.4~4.0)
|
380~400(3.8~4.0)
|
230~275(2.89~3.46)
|
235~290(2.95~3.65)
|
|
Y20~2
|
28.5~32.5(3.5~4.0)
|
395~415(3.95~4.15)
|
275~300(3.46~3.77)
|
310~335(3.90~4.21)
|
|
Y32
|
30.0~33.5(3.8~4.2)
|
400~420(4.0~4.2)
|
160~190(2.01~2.38)
|
165~195(2.07~2.45)
|
|
Y33
|
31.5~35.0(4.0~4.4)
|
410~430(4.1~4.3)
|
220~250(2.77~3.14)
|
225~255(2.83~3021)
|
|
Y35
|
30.0~32.0(3.8~4.0)
|
400~410(4.0~4.1)
|
175~195(2.20~2.45)
|
180~200(2.26~2.51)
|
|
Grade
|
Remanence Br
|
Coercive Force Hcb
|
Instrinsitc Coercive Force Hcj
|
Max Product BH(max)
|
|
mT(KGs)
|
kA/m(kOe)
|
kA/m(kOe)
|
kJ/m3(MGOe)
|
|
|
C
|
230(2.3)
|
148(1.86)
|
258(3.5)
|
8.36(1.05)
|
|
C5
|
380(3.8)
|
191(2.4)
|
199(2.5)
|
27.0(3.4)
|
|
C7
|
340(3.4)
|
258(3.23)
|
318(4.00)
|
21.9(2.75)
|
|
C8(=C8A)
|
385(3.85)
|
235(2.95)
|
242(3.05)
|
27.8(3.5)
|
|
C8B
|
420(4.2)
|
232(2.913)
|
236(2.96)
|
32.8(4.12)
|
|
C9
|
380(3.8)
|
280(3.516)
|
320(4.01)
|
26.4(3.32)
|
|
C10
|
400(4.0)
|
288(3.617)
|
280(3.51)
|
30.4(3.82)
|
|
C11
|
430(4.3)
|
200(2.512)
|
204(2.56)
|
34.4(4.32)
|
|
Grade
|
Remanence Br
|
Coercive Force Hcb
|
Intrinsic Coercive Force Hcj
|
Max Energy Product BH(max)
|
|
mT(KGs)
|
KA/m(KOe)
|
KA/m(KOe)
|
KJ/m3(MGOe)
|
|
|
HF8/22
|
200~220(2.00~2.20)
|
125~140(1.57~1.76)
|
220~230(2.76~2.89)
|
6.5~6.8(0.8~1.1)
|
|
HF20/19
|
320~333(3.20~3.33)
|
170~190(2.14~2.39)
|
190~200(2.39~2.51)
|
20.0~21.0(2.5~2.7)
|
|
HF20/28
|
310~325(3.10~3.25)
|
220~230(2.76~2.89)
|
280~290(3.20~3.64)
|
20.0~21.0(2.5~2.7)
|
|
HF22/30
|
350~365(3.50~3.65)
|
255~265(3.20~3.33)
|
290~300(3.64~3.77)
|
22.0~23.5(2.8~3.0)
|
|
HF24/16
|
350~365(3.50~3.65)
|
155~175(1.95~2.20)
|
160~180(2.01~2.26)
|
24.0~25.5(3.0~3.2)
|
|
HF24/23
|
350~365(3.50~3.65)
|
220~230(2.76~2.89)
|
230~240(2.89~3.01)
|
24.0~25.5(3.0~3.2)
|
|
HF24/25
|
360~370(3.60~3.70)
|
260~270(3.27~3.39)
|
350~360(4.40~4.52)
|
24.0~25.5(3.0~3.2)
|
|
HF26/16
|
370~380(3.70~3.80)
|
155~175(1.95~2.20)
|
160~180(2.01~2.26)
|
26.0~27.0(3.2~3.4)
|
|
HF26/18
|
370~380(3.70~3.80)
|
175~190(2.20~2.39)
|
180~190(2.26~2.39)
|
26.0~27.0(3.3~3.4)
|
|
HF26/24
|
370~380(3.70~3.80)
|
230~240(2.89~3.01)
|
240~250(3.01~3.14)
|
26.0~27.0(3.3~3.4)
|
|
HF26/26
|
370~380(3.70~3.80)
|
230~240(2.89~3.01)
|
260~270(3.27~3.39)
|
26.0~27.0(3.3~3.4)
|
|
HF26/30
|
385~395(3.85~3.95)
|
260~270(3.27~3.39)
|
300~310(3.77~3.89)
|
26.0~27.0(3.3~3.4)
|
|
HF28/26
|
385~395(3.85~3.95)
|
250~265(3.14~3.33)
|
260~275(3.27~3.45)
|
28.0~30.0(3.5~3.8)
|
|
HF28/28
|
385~395(3.85~3.95)
|
260~270(3.27~3.39)
|
280~290(3.50~3.60)
|
28.0~30.0(3.5~3.8)
|
|
HF30/26
|
395~405(3.95~4.05)
|
250~260(3.14~3.33)
|
260~270(3.27~3.39)
|
30.0~31.5(13.8~3.9)
|
|
HF32/17
|
410~420(4.10~4.20)
|
160~180(2.01~2.26)
|
165~175(2.07~2.20)
|
32.0~33.0(4.0~4.1)
|
|
HF32/22
|
410~420(4.10~4.20)
|
215~225(2.70~2.83)
|
220~230(2.76~2.89)
|
32.0~33.0(4.0~4.1)
|
|
HF32/25
|
410~420(4.10~4.20)
|
240~250(3.01~3.14)
|
250~260(3.14~3.27
|
32.0~33.0(4.0~4.1)
|