Ferrite ring magnet Large speaker magnet C8 manufacturer from China Zhuzhou Summit New Materials Co., Ltd

Ferrite ring magnet Large speaker magnet

Price:	0.12 USD
Payment Terms:	T/T
Place of Origin:	Hunan, China (Mainland)


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Product Detail

Model No.: C8

Production Capacity: 500t/a

Delivery Date: 20-30days

Application: Speaker Magnet

Composite: Ferrite Magnet

packaging details: cartons

Service: OEM

Means of Transport: Ocean,Land,Air

Packing: Cartons

Shape: Cylinder

Type: Permanent

Brand Name: Summit

Size: Customize

Ferrite magnets are manufactured by pressing, sintering, or injection molding. These magnets can be both anisotropic and isotropic.

Hard Ferrite (ceramic) magnets, composed of barium or strontium, were developed in the early 1960's as an alternative to the more expensive metallic magnets. This class of magnet is very hard, brittle and possesses lower energy characteristics compared to other magnetic materials. However, it is very popular and widely used because of its excellent resistance to demagnetizaion, corrosion, and the advantageous pricing.

Ferrite magnets are manufactured by pressing, sintering, or injection molding. These magnets can be both anisotropic and isotropic. Anisotropic grades are oriented in the manufacturing direction and must be magnetized in the direction of orientation. Isotropic grades are not oriented and can be magnetized in any direction.

Physical property of hard ferrite magnets

Typical Physical Properties
Curie Temperature (°C)	450
Maximum Operating Temperature (°C)	250
Hardness (Hv)	480-580
Density (g/cm3)	4.8 - 4.9
Relative Recoil Permeability (μrec)	1.05 - 1.20
Saturation Field Strength, kOe (kA/m)	10 (800)
Temperature Coefficient of Br (%/°C)	-0.2
Temperature Coefficient of iHc (%/°C)	0.3
Tensile Strength (N/mm)	<100
Transverse Rupture Strength (N/mm)	300

Mostly Used national standard - SJ285-77 permanent ferrite magnet standard

Grade	Br		Hcb		Hcj		BHmax
Grade	kGs	mT	kOe	kA/m	kOe	kA/m	KJ/m3	MGOe
Y10T(=C1)	2.00/2.18	200/218	1.57/1.82	125/145	2.64/3.14	210/250	6.5/8.0	0.8/1.0
Y25	3.60/3.70	360/370	1.70/1.88	135/150	1.76/2.14	140/170	22.5/25.3	2.8/3.2
Y30(=C5)	3.80/3.85	380/385	2.40/2.64	191/210	2.50/2.51	199/220	26.0/28	3.4/3.7
Y30BH	3.80/3.90	380/390	2.80/2.95	223/235	2.90/3.08	231/245	27.0/30.0	3.4/3.7
Y33	4.10/4.20	410/420	2.77/2.95	220/235	2.83/3.01	225/240	31.5/33.0	4.0/4.2
Y35	4.00/4.10	400/410	2.20/2.45	175/195	2.26/2.51	180/200	30.0/32.0	3.8/4.0
C8(=C8A)	3.85/3.90	385/390	2.95/3.20	235/255	3.05/3.33	242/265	27.8/30.0	3.5/3.7
C10	4.00/4.10	400/410	3.62/3.77	288/300	3.51/3.60	280/287	30.4/31.9	3.8/4.0

Ferrite ring magnet Large speaker magnet

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