High-Performance Permanent Magnet Ferrite With High Coercive Anisotropy

High-Performance Permanent Magnet Ferrite With High Coercive Anisotropy

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.

What's the key advantages of ceramic strontium ferrite magnets made by wet compression molding?

• Low cost - Strontium ferrite is inexpensive and the wet molding process is relatively simple. This makes them cheaper than rare-earth magnets.

• High magnetic property-Even without heavy rare earth element additions, strontium ferrite magnets can achieve coercivities of 700-1000 kA/m, making them suitable for many applications.

• Dimensional consistency - The compression molding process allows for close dimensional tolerances and uniform magnet shapes to be produced consistently.

• Temperature stability - Strontium ferrite magnets have high Curie temperatures, typically around 450-470°C. They maintain good magnetic properties over a wide operating temperature range.

• Resistance to corrosion - Being fully dense ceramic materials, they are not prone to corrosion like bonded magnets containing additives.

• Mass production capability - The molding process is amenable to automated high-volume manufacturing of complex magnet geometries.​​

PHYSICAL PROPERTIES OF SINTERED FERRITE MAGNETS

What's the application of Xinheng's permanent ferrite magnets?

Xinheng mainly manufactures the following types of ceramic arc segment magnets:

• Automotive motor magnet including automobile starter motor magnet, automobile wiper motor magnet, automobile rolling window motor magnet, automobile heating and cooling fan motor magnet, automobile seat motor magnet, automobile sunroof motor magnet, automobile powsteering motor magnet, automobile tailgate motor magnet, automobile oil pump motor magnet, automobile ABS anti-lock motor magnet, etc.
• Inverter home appliance magnet including inverter washing machine motor magnet, inverter refrigerator motor magnet, inverter air-conditioner motor magnet,etc.
• Fan motor magnet including ceiling fan motor magnet, floor fan magnet, etc.
• Motorcycle motor magnet including motorcycle starter motor magnet, motorcycle flywheel magneto magnet, etc.
• Electrical tool motor magnet including cutting machine motor magnet, electric sawing machine motor magnet, lawn mower motor magnet, gasoline generator magnet, etc.
• Actuator motor magnet including medical bed actuator motor magnet, TV lifting bracket actuator motor magnet, desk lifting actuator motor magnet, smart home appliance actuator motor magnet, etc.

How Xinheng fabricates its permanent strontium ferrite magnet?

FERRITE POWDER GRADE OF INVERTER MOTORS MAGNET

INVERTER MOTORS MAGNET SPECIFICATION TABLE

The role of permanent magnet ferrite in the generator is mainly reflected in the following aspects:

To generate a stable magnetic field:
As a kind of permanent magnet material, the key role of permanent magnet ferrite in generator is to generate stable magnetic field. This magnetic field is maintained by the permanent magnet itself and does not require additional excitation power to generate it
. The high permeability and stable magnetic properties of permanent magnet ferrite can provide a stable magnetic field, which is essential for the stable operation of the generator

Increase efficiency:
The generator using permanent magnet ferrite can significantly improve the power generation efficiency by eliminating the excitation winding and the corresponding excitation loss. The efficiency of permanent magnet generators is usually higher than that of traditional excitation generators, especially at medium and low speeds

Small size, light weight:
The use of permanent magnet ferrite makes the rotor structure of the generator more compact, thus reducing the volume and weight of the generator. This design not only reduces the overall mechanical load, but also increases the specific power (i.e. the ratio of power to volume).

Extend battery life:
The permanent magnet generator usually adopts the switching rectifier voltage regulation mode, which has high voltage regulation precision and good charging effect, so as to significantly extend the service life of the battery

Application of variable frequency motor:

Air conditioning system: Variable frequency motor can automatically adjust the speed according to the change of indoor and outdoor temperature, so as to achieve accurate temperature control and energy saving.

Household appliances: such as washing machines, refrigerators and vacuum cleaners, variable frequency motors can improve the working efficiency of electrical appliances, reduce energy consumption and extend service life.

Pumps and fans: In water treatment, water supply systems and ventilation equipment, variable frequency motors can adjust the flow and air volume according to demand, achieving energy saving and optimized operation.

Electric vehicles and power tools: Variable frequency motors are used as a power source in electric vehicles, providing smooth acceleration performance. In power tools, different speed adjustment can be achieved to adapt to different work needs.

Industrial automation: In industrial production, variable frequency motors are often used in conveyor belts, packaging machinery and other automation equipment for precise control and energy efficiency optimization.

Swimming pool water treatment: In the water treatment system of the swimming pool, the variable frequency motor is used to control the work of the pump and automatically adjust the water flow and filtration speed according to the water quality.