Advanced Permanent Magnet Ferrite for Large Commercial Electric Fans

Advanced Permanent Magnet Ferrite Used In Large Commercial Electric Fans

The role of Permanent Magnet Ferrite in the fan is mainly reflected in the following aspects:

Drive motor: A fan's motor usually requires a magnetic field to drive rotation, and permanent magnet ferrite can provide a stable magnetic field. Compared with electromagnets, permanent magnets do not require additional power supply during operation and are therefore more energy efficient.

Size and weight: Permanent magnet ferrites are relatively light and small, which can help design more compact and lightweight fans. This is especially important for portable fans or small appliances.

Cost effective: The production cost of ferrite-type permanent magnet materials is lower, so using them can reduce the manufacturing cost of fans. Although their magnetic properties are not as good as some rare earth permanent magnet materials, they are sufficient for many fan applications.

High temperature resistance: permanent magnet ferrite has good high temperature resistance, which can ensure stability and durability for such equipment as fans that need long-term operation.

Noise control: Fans using permanent magnet ferrite usually run smoothly and can effectively reduce noise. This is especially important for applications in environments where silence is required (e.g., offices, bedrooms).

Life: Permanent magnet ferrite materials have a long service life and are not easy to demagnetize, so the frequency of maintenance and replacement can be reduced.

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.

• 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

How Xinheng fabricates its permanent strontium ferrite magnet?

FERRITE POWDER GRADE OF FAN MOTORS MAGNET

FAN MOTORS MAGNET SPECIFICATION TABLE

To know more about Xinheng Magnets

Sichuan Xinheng Magnetic Materials Co., Ltd is located in Mianzhu City, Sichuan Province, which has been known as " the leader of ancient Shu and the important town of Yizhou " since ancient times.
The company was founded in May 2008. It was formerly the designated magnetic material production enterprise of the Ministry of Electronic Industry in Aba Prefecture, Sichuan Province. After decades of accumulation in the magnetic materials industry, the company has developed into a national high-tech enterprise integrating the design, development, production and sales of permanent magnet ferrites. Our factory covers an area of 14,000 square meters, has an annual production capacity of 8,000 tons, and has more than 350 employees.
The company owns China's first independently developed servo fully automatic wet hydraulic press and China's first double-layer roller kiln.It has the ability to independently design, develop and process various types of tools and molds.
The company's main product is sintered ferrite permanent magnet. The product range covers automobile motors, motorcycle motors, universal mechanical motors, household appliance motors, household fan motors, variable inverter motors, water pump motors, etc. The products are widely used in automobiles and motorcycles, office equipment, electric tools, household appliances, fitness equipment and other fields.
The company's products are mainly sold to motor manufacturers in Europe, America, South Asia, Taiwan, southwest China, East China, and South China.
The company adheres to the business tenet of "quality assurance, professional service, and customer satisfaction". Its business philosophy is to improve the level of operation and management, to imporove the quality of employees, reduce production costs, and improve the market competitiveness of enterprises. It adheres to the development philosophy of putting people first, making high-quality products with heart, seeking development through innovation, and building brands with integrity. We are willing to create a win-win relationship and grow together with our customers!