Ferrite ring magnet Large speaker magnet
| Min. Order: | 100 Piece/Pieces |
|---|---|
| Trade Term: | FOB |
| Payment Terms: | T/T |
| Supply Ability: | 500t/a |
| Place of Origin: | Hunan |
Company Profile
| Location: | Zhuzhou, Hunan, China (Mainland) |
|---|---|
| Business Type: | Manufacturer |
Product Detail
| Model No.: | C8 |
|---|---|
| Means of Transport: | Ocean, Air, Land |
| Shape: | Cylinder |
| Application: | Speaker Magnet |
| Type: | Permanent |
| Composite: | Ferrite Magnet |
| Brand Name: | Summit |
| packaging details: | cartons |
| Size: | Customize |
| Service: | OEM |
| Production Capacity: | 500t/a |
| Packing: | Cartons |
| Delivery Date: | 20-30days |
Product Description
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 | ||||
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 |
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