Square Ferrite Magnet

Ferrite magnet is a permanent ferrite magnet mainly made of SrO or BaO and Fe2O3. Compared with other permanent magnets, ferrite magnets are hard and brittle with low magnetic energy, but they are not easy to demagnetize. It is not easy to corrode, the production process is simple and the price is low. Therefore, the output of ferrite magnets in the entire magnet industry is high and they are widely used in industrial production.

Ferrite magnets are sintered permanent magnet materials, composed of barium and strontium ferrite. In addition to strong anti-demagnetization properties, this ferrite permanent magnet material also has the advantage of low cost. Permanent ferrite magnets are hard and brittle and require special machining processes. The magnets of the opposite sex must be magnetized in the direction because they are oriented along the manufacturing direction, while the magnets of the same sex can be magnetized in any direction because they are not oriented, although a slightly stronger magnetic induction will be found on the pressure-bearing surface, which is often the smaller side. . The magnetic energy product range is between 1.1MGOe and 4.0MGOe. Due to their low cost, ferrite magnets have a wide range of applications, ranging from motors and speakers to toys and handicrafts. Therefore, they are currently the most widely used permanent magnet material.

Ferrite magnet material characteristics
Permanent ferrite magnets are produced using powder metallurgy methods and have low residual magnetism and low recovery magnetic permeability. It has large coercive force and strong resistance to demagnetization, and is particularly suitable for use as a magnetic circuit structure under dynamic working conditions. The material is hard and brittle and can be used for cutting with emery tools. Ferrite permanent magnet material is an oxide, so it is not easy to corrode. Working temperature: -40℃ to +200℃.
Ferrite magnets are divided into anisotropy (isotropy) and isotropy (isotropy). The isotropic sintered ferrite permanent magnet material has weak magnetic properties, but can be magnetized in different directions of the magnet; the anisotropic sintered ferrite permanent magnet material has strong magnetic properties, but can only be magnetized along the direction of the magnet. Predetermined magnetizing direction magnetization

Ferrite magnet physical properties
In the actual production of permanent ferrite magnets, raw materials with good chemical composition sometimes may not be able to obtain permanent ferrite magnets with good performance and microstructure. The reason is the influence of physical properties. The listed physical properties of iron oxide include average particle size APS, specific surface area SSA and bulk density BD. Since iron oxide accounts for about 70% of the formula of manganese-zinc ferrite magnets, its APS value has a great influence on the APS value of ferrite magnet powder. Generally speaking, the APS value of iron oxide is small, and the APS value of permanent ferrite magnet powder is also small, which is beneficial to speeding up the chemical reaction. However, considering that too fine powder particles are not conducive to easy crystallization in subsequent pressing and sintering, the APS value should not be too small. Obviously, when the APS value of iron oxide is too large, during pre-sintering, due to the large particle size, only the diffusion reaction of the spinel phase can be carried out, and the grain growth process cannot be further carried out. This will inevitably lead to an increase in the activation energy required during sintering, which is not conducive to solid-phase reactions.

Our advantage
1. Rich experience: We are a ferrite magnet manufacturer that has been engaged in ferrite permanent magnet materials for many years and can provide you with one-stop customized solutions for powerful magnets.
2. Quality assurance: There are many magnet brands, models and specifications; through strict production technology, we are equipped with complete assays, analysis, testing and testing to ensure that we meet customer needs.
3. Rapid delivery: We have multiple production equipment to meet customers' production requirements for permanent magnet materials; we can ensure product quality, ship on time, and provide customized processing services.
4. Intimate after-sales service: The professional after-sales team and logistics distribution system provide you with one-on-one and considerate services in processing and delivery.