Company profile:
The company boasts the first domestically developed servo fully-automatic wet press oil press machine and the first dual-track roller kiln in the nation. It also possesses the capability for independent design, development, and processing of various types of molds.
The primary business of the company focuses on sintered ferrite permanent magnet components, encompassing automotive motors, motorcycle motors, general machinery motors, household appliance motors, household fan motors, variable frequency motors, water pump motors, and more. These products are widely used in the automotive, motorcycle, office equipment, power tools, household appliances, and fitness equipment industries.
What is permanent magnet ferrite?
Permanent magnet ferrite has a very high magnetic energy product and coercivity, it can produce a large magnetic field and magnetic force under a small size and weight, while having a high magnetic temperature coefficient and thermal stability, can maintain stable magnetic properties at higher temperatures. This makes the permanent magnet ferrite still able to work normally in a high temperature environment and is not easy to lose magnetism. Good corrosion resistance and wear resistance, so that it is not easily affected by the external environment and damage.
Permanent magnet ferrite is a material with high permeability and magnetization, so it has a wide range of uses in a variety of applications. The following are some applications of permanent magnet ferrite:
Motors and generators: Permanent magnet ferrite is widely used in a variety of motors and generators, including household appliances, automobiles, industrial equipment, etc. Due to its excellent magnetic properties, it can improve the efficiency and performance of motors and generators.
Magnetic sensor: Permanent magnet ferrite can be used to manufacture magnetic sensors, such as magnetometers, magnetic field sensors, etc., for measuring and monitoring magnetic field strength and direction.
What's the application of Xinheng's permanent ferrite magnets?
Xinheng mainly manufactures the following types of ceramic arc segment magnets:
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Electric motors and generators: Ferrite magnets are commonly used in motors and generators due to their high magnetic strength and stability.
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Magnetic separators: Ferrite magnets are used in magnetic separators to remove ferrous particles from liquids and powders in a variety of industries, including food processing, pharmaceuticals, and mining.
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Speakers and headphones: Ferrite magnets are used in the speakers and headphones of audio equipment due to their ability to produce strong magnetic fields.
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Magnetic resonance imaging (MRI): Ferrite magnets are used in MRI machines to create the magnetic fields necessary for imaging.
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Magnetic couplings: Ferrite magnets are used in magnetic couplings to transmit torque without physical contact, enabling the sealed transfer of fluids or gases in various industrial applications.
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Magnetic therapy: Ferrite magnets are used in magnetic therapy products for pain relief and healing purposes.
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Other applications: Ferrite magnets are also used in automotive sensors, magnetic bearings, and various consumer electronics.
PHYSICAL PROPERTIES OF SINTERED FERRITE MAGNETS
| | Units | Sintered Ferrite (Ceramic) |
| Curie Temperature | ºC | 450 |
| Maximum Operating Temperature | ºC | 350 |
| Hardness | Hv | >530 |
| Density | g/cm3 | 4.8 – 5.0 |
| Relative recoil permeability | μrec | 1.05-1.1 |
| Temperature Coefficient Br | %/ºC | -0.18 |
| Temperature Coefficient iHc | %/ºC | 0.11-0.40 |
| Anti-Bending Strength | N/m2 | (0.5-0.9)×108 |
| Anti-Compressive Strength | N/m2 | ≥6.9×108 |
| Anti-Tensile Strength | N/m2 | (0.2-0.5)×108 |
| Specific Heat | J/kg·K | 600-900 |
| Resistivity | Q.cm | >104 |
What's the feature of ceramic strontium ferrite magnet made by wet compression molding?
- Composition - Contain strontium ferrite (SrFe12O19) as the primary magnetic material. Strontium ferrite has good magnetic properties and is inexpensive to produce.
- Density - Have a high relative density of around 95% or more after sintering. This gives good mechanical strength.
- An-isotropy - Exhibit strong magnetocrystalline an-isotropy due to their hexagonal crystal structure. This results in a preferred direction of magnetization along one axis.
- Particle shape - The strontium ferrite powder used typically has a hexagonal platelet morphology which helps promote magnetic an-isotropy during molding and sintering.
- Molding method - The powder is mixed with a liquid binder and compression molded into a dense green compact using high pressures. This orients the an-isotropic particles.
- Firing process - The compact is then sintered at high temperature to develop density while preserving the induced magnetic anisotropy orientation from molding.
- Remanence - Have a maximum magnetic flux density or remanence along the axis of anisotropy, but little/no remanence perpendicular to it.
- Coercivity - Usually have medium to high coercivity depending on additives, density, and anisotropy level achieved.
FERRITE POWDER GRADE OF UNIVERSAL MOTORS MAGNET
| Grade | Br(mT) | Hcb(KA/m) | Hcj(KA/m) | (BH)max(KJ/m3) |
| mT | Gs | KA/m | Oe | KA/m | Oe | KJ/m3 | MGOe |
| Y30H-1 | 380-400 | 3800-4000 | 230-275 | 2890-3460 | 235-290 | 2950-3640 | 27.0-32.5 | 3.4-4.1 |
| Y33 | 410-430 | 4100-4300 | 220-250 | 2760-3140 | 225-255 | 2830-3200 | 31.5-35.0 | 3.9-4.4 |
| Y33H | 410-430 | 4100-4300 | 250-270 | 3140-3390 | 250-275 | 3140-3450 | 31.5-35.0 | 3.9-4.4 |
| Y35 | 430-450 | 4300-4500 | 215-239 | 2700-3000 | 217-241 | 2730-3030 | 33.1-38.2 | 4.1-4.8 |
