A comprehensive guide to Ferrite Magnet

Views: 23     Author: Site Editor     Publish Time: 2024-05-07      Origin: Site

Ferrite magnet, also known as ceramic magnets, are a type of permanent magnet made from iron oxide and strontium carbonate. They were first developed in the 1950s by Japanese company, Honesun, and have since become widely used in various electronic and engineering applications. In this article, we will explore the different aspects of ferrite magnets, including their composition, properties, and applications.


Properties of Ferrite Magnets


  1. Magnetic strength: It has a high magnetic strength, typically between 1,500 to 4,000 gauss.

  2. Corrosion resistance: They have excellent resistance to corrosion, making them suitable for use in harsh environments.

  3. High coercivity: This means that they are difficult to demagnetize and can retain their magnetic strength for a long time.

  4. Low Curie temperature: The Curie temperature is the temperature at which a material loses its magnetic properties. It has a low Curie temperature, usually around 450 °C, which makes them unsuitable for high-temperature applications.

  5. Brittle: Ferrite magnets are brittle and can easily break or chip if mishandled.

  6. Low density: They have a low density, making them lightweight and ideal for applications where weight is a concern.


Applications of Ferrite Magnets


  • Speakers and headphones: They are commonly used in speakers and headphones due to their high magnetic strength and low cost.

  • Motors and generators: Their ability to retain their magnetic strength even in high-temperature environments makes them suitable for use in motors and generators.

  • Magnetic separators: They are popular in magnetic separators used in industries such as food processing, ceramics, and pharmaceuticals.

  • Magnetic therapy: Due to their low cost, they are also used in magnetic therapy to help with muscle and joint pain.

  • Magnetic door latches: The high coercivity of it makes them ideal for use in magnetic door latches.

  • Craft and hobby applications: Their low cost and availability in various shapes and sizes make it popular for use in craft and hobby applications.

Honesun focuses on designing, researching, developing, manufacturing and selling Magnets and Magnetic Assemblies. Through 15 years' continuous research and development, we have become one of the leading manufacturers of ferrite magnets, providing high-quality products to industries all over the world.


Related models:

Y40 Ferrite Magnetic

C8 Y30BH Ferrite Magnets

Y35 Disc Ferrite Magnet


Let's learn more about Ferrite Core,Anisotropic Magnet,Cation Substitution,Demagnetization Curve,Remanence:


PartⅠ-Ferrite Core


Ferrite magnets are primarily used in the form of ferrite cores, which are widely employed in electronic devices such as transformers, inductors, and electric motors. These cores are made by compressing and firing powdered ferrite material in a magnetic field. Ferrite cores are known for their high permeability and low eddy current losses, making them ideal for applications that require high-frequency operation.


PartⅡ-Anisotropic Magnet


It can be made either isotropic or anisotropic, with the latter being the more powerful and expensive option. Anisotropic magnets are formed by heating isotropic magnets at high temperatures in a magnetic field, which aligns the particles in a preferred direction. This alignment results in a stronger magnetic field and higher energy product, making anisotropic ferrite magnets the choice for high-performance applications.


PartⅢ-Cation Substitution


The magnetic and physical properties of it can be altered by substituting different cations, such as manganese, cobalt, or nickel, into the crystal lattice structure. This process, known as cation substitution, allows for customization of ferrite magnets for specific applications. For example, adding cobalt can increase the coercivity of a ferrite magnet, making it useful for applications that require higher magnetic field strengths.

PartⅣ-Demagnetization Curve


The magnetic properties of they are characterized by a demagnetization curve, which shows the relationship between the applied magnetic field and the resulting magnetic flux density. This curve is S-shaped, with a steep slope in the initial region, indicating a high coercivity. Understanding the demagnetization curve is essential in designing it for specific applications.


PartⅤ-Remanence


Remanence is the measure of the strength of the magnetic field that is still present in a material after the external magnetic field is removed. For them, remanence is typically about 25% of the saturation magnetization. This property is crucial in determining the performance of a magnet, as it indicates the level of residual magnetism that can be used in subsequent magnetization.


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