FERRITE MAGNET

Ferrite Magnets offer an excellent cost / performance ratio, and are made mainly from Fe2O3 (ferric Oxide) and BaCo3 (barium carbonate) or SrCo3 (Strontium carbonate). These magnets are formed by powder metallurgy. There are two types of magnet : the isotropic magnet, molded in the absence of a magnetic field; and the anisotropic magnet, which has outstanding directi-nality of field. The anisotropic magnet is the best choice when a high magnetic flux density is required.

Ferrite Magnet has wide applications, such as forr D.C. Micromotors, Synchronous Motors, Generators, Dynamos, Musical Instru-ments (Telephone, Loudspeaker, Headphone, Guitar), Switches, Buzzers, Toys, Stationery, Hardwares, Ore Screening and Separating Machine, etc.

A. TAIWAN FACTORY

CHARACTERIZATION :

Characteristic	Symbol (unit)	DJ-1	DJ-2	DJ-3
Residual flux density	Br (G)	2100~2300	3400~3700	3600~3800
Coercive force	BHC (Oc)	1800~2000	1800~2200	2800~3000
Maximum energy product	(BH) max (MG.Oe)	0.9~1.1	2.9~3.2	2.8~3.2

DEMAGNETIZATION CURVES :
	(BH) max X 106 (G.Oe)

B. CHINA FACTORY

(Standards / Grades) classified in P.R.ChIna's factory)

Materials	Residual induction		Induction coercive torce		Maximum energy product		Note
	MKS system	CGS system	MKS system	CGS system	MKS system	CGS system
y10T	0.20	2000	128~160	1600~20000	6.4~9.6	0.8~1.2	Isotropy
y15	0.28~0.36	2800~3600	128~192	1600~2400	14.3~17.5	1.8~2.2	Anisotropy
y20	0.32~0.38	3200~3800	128~192	1600~2400	18.3~21.5	2.3~2.7	Anisotropy
y25	0.35~0.39	3500~3900	152~208	1900~2600	22.3~25.5	2.8~3.2	Anisotropy
y30	0.38~0.42	3800~4200	160~216	2000~2700	26.3~29.5	3.3~3.7	Anisotropy
y35	0.40~0.44	4000~4400	176~214	2200~2800	30.3~33.4	3.8~4.2	Anisotropy
y15H	0.31	3100	232~248	2900~3100	17.5	2.2	Anisotropy
y30BH	0.38~0.40	3800~4000	224~240	2800~3000	27.1~30.3	3.4~3.8	Anisotropy

DEMAGENETIZATION CURVES :

Typical demagnetization curves of permanent ferrite materials

Ferrite Magnets is made by sintering at high temperature. The finished products have considerable shrinkage. The following dimension tolerance is for reference.

	Measuring Points	Isotropic	Anisotropic
Not ground	Length (L) Width (W) Out diameter (D) Inner diameter (d)	1.5% 0.15mm at least	2.0% 0.20mm at least
	Thickness (T)	1.5% 0.20mm at least	1.5% 0.20mm at least
Ground	Length (L) Width (W) Out diameter (D)	0.1mm	0.1mm
	Thickness (T) 0-25mm 25mm	0.1mm 0.15mm	0.1mm 0.15mm

How To Place Order
	please specify charactaristics listed below.
1.	Material (magnetic properties : Br. Hc. BH max)
2.	Shape, dimensional sizes, and tolerance level
3.	Quantity (spot order or continuous order)
4.	Specific finish if required
5.	Orientation (magnetizing direction)
6.	Application
7.	Magnetized or unmagnetized
8.	Using condition (temperature, environment, etc.)
9.	Other if any

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Address 1 (Head office) :

No. 107, Kuan-Fu Rd., Bei-Dou (52146) Changhwa Hsien, Taiwan.

TEL : 886-4-8882451      FAX : 886-4-8873056

E-mail :sales@magnet-mouldedparts.com.tw

Address 2 (Factory in Shanghai,China) :

No.8 Building, Floor 5, No 2716 Pingliang Rd. Shanghai, China

NOTE: All samples,documents..etc should be sent to P.O.Box 136,Bei-Dou(52146),Changhwa Hsien,Taiwan.

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