Call: 1.800.941.8181
Email: sales@ach-mag.com

  Your Location: Material >> Ceramic
About Us
Company Profile
Facilities
Material
Ceramic
Sintered Neodymium
Bonded Neodymium
SmCo
AlNiCo
Flexible (Rubber)
Flexible Neodymium
Assemblies
Motor Assemblies
RB Assemblies
Other Assemblies
Service
Wharehouse Storage
Magnetization
Special Handling
Find a Magnet
Contact us
Location
Request a Quotation
Email Us
 
Product Introduction

Sintered Ferrite Magnets are also called Ceramic Magnets. There are mainly two types of ferrite magnets, Barium ferrite (BaO.6Fe2O3) and Strontium ferrite (SrO.6Fe2O3). Compared with other permanent magnets, sintered ferrite magnet is cheap. It is most suitable for most sensitive, but need not very high performance applicaitons. As this is a non-metal magnets, it is the ideal magnets for applications that require non-rusty magnets in humit envirument. Sintered ferrite magnets are widely used in many different applications, such as motors, cars, magnetic selection loudspeakers, and many special applications.

Sintered ferrite (ceramic) magnets are also available in forms of isotropic and an-isotropic. The magnetic properties of isotropic ferrite are the same in all directions, therefore they can be magnetized in any pole arrangements. An-isotropic ferrite magnets, on the other hand, can only be magnetized in the direction they are oriented during production, but they have much higher magnetic strength than isptropic ones.

Characteristics
  • Sintered ferrite magnets can be used in between -40 °C and +200 °C
  • Being hard and brittle, they can be cut by using diamond tools.
  • The raw material of sintered ferrite magnets is oxide, thus they would not be rusted under severe environment nor affected by many chemicals (except some strong acids).
Magnetic Property for Ceramic (Ferrite)

Grade MMPA Br
Gs (mT)
Hcb
Oe (KA/m)
Hcj
Oe (KA/m)
BHmax
MGOe(KJ/m3)
D
g/cm3
α %/°C
Br (Hcj)
TC
°C/°F
Tmax
°C/°F
D10T   2100-2300 (210-230) 1600-2000 (127-159) 2650-2950 (211-235) 0.7-1.1 (5.6-8.8)

4.7-4.9

-0.18(+0.4) 733/1351 460/860
D20T C1 2250-2450 (225-245) 1750-2050 (139-163) 3100-3400 (246-270) 0.9-2.0 (7.0-16) 4.7-4.9 -0.18(+0.5) 733/1351 460/860
D20   3200-3400 (320-340) 1700-2100 (135-167) 1750-2150 (140-171) 2.3-2.7 (18.3-21.5) 4.7-4.9 -0.18(+0.5) 733/1351 460/860
D25   3800-4000 (380-400) 1800-2200 (143-175) 1850-2250 (147-179) 3.0-3.4 (23.9-27.1) 4.9-5.0 -0.18(+0.5) 733/1351 460/860
D30 C5 3900-4100 (390-410) 2200-2600 (175-207) 2250-2650 (179-211) 3.2-3.6 (25.5-28.7)

4.8-5.0

-0.18(+0.45) 733/1351 460/860

D33H

  3900-4100 (390-410) 3000-3400 (239-271) 3050-3450 (243-275) 3.4-3.8 (27.1-30.3) 4.9-5.0 -0.18(+0.4) 733/1351 460/860
D34H C7 3700-3900 (370-390) 3300-3650 (263-291) 3850-4150 (307-330) 3.6-3.8 (28.7-30.3) 4.8-5.0 -0.18(+0.35) 733/1351 460/860
D3845 C8A 3700-3900 (370-390) 3300-3750 (263-299) 4300-4750 (342-378) 3.2-3.6 (25.5-28.7) 4.8-5.0 -0.18(+0.4) 733/1351 460/860
D3850   3700-3900 (370-390) 3500-3800 (279-303) 4800-5100 (382-406) 3.2-3.6 (25.5-28.7) 4.8-5.0 -0.18(+0.4) 733/1351 460/860
D4036 C10 3950-4150 (395-415) 3300-3650 (263-291) 3500-3800 (279-303) 3.6-4.0 (28.7-31.8) 4.9-5.0 -0.18(+0.4) 733/1351 460/860
D4040 C9 3900-4100 (390-410) 3400-3700 (271-295) 3850-4100 (307-326) 3.7-4.1 (29.6-32.8) 4.9-5.0 -0.18(+0.4) 733/1351 460/860
D4129 C8B 4000-4200 (400-420) 2700-3000 (215-239) 2750-3050 (219-243) 3.7-4.1 (29.6-32.8) 4.9-5.0 -0.18(+0.4) 733/1351 460/860
D4229 C11 4150-4350 (415-435) 2700-3000 (215-239) 2750-3050 (219-243) 3.9-4.3 (31.2-34.4) 4.9-5.0 -0.18(+0.4) 733/1351 460/860
D4240 C12 4100-4300 (410-430) 3550-3850 (283-307) 3850-4150 (307-330) 4.0-4.4 (31.8-35.2) 4.9-5.0 -0.18(+0.4) 733/1351 460/860
D4433   4300-4500 (430-450) 3100-3400 (247-271) 3150-3450 (251-275) 4.4-4.8 (35.2-38.4) 4.9-5.0 -0.18(+0.4) 733/1351 460/860