In modern industry and technology, permanent magnet materials are used more and more widely, especially in motors, sensors, speakers and other electronic products. Among them, permanent magnet ferrite and NdFeb are two important permanent magnet materials, which each have different characteristics and application scenarios.
Permanent magnet ferrite:
The main components are iron, strontium, oxygen and other compounds. The chemical form ₉ is usually BaFe₁₂O₁₉ or SrFe₁₂O₁₉.
Magnetism comes from the crystal structure of ferrite and has strong anisotropy.
The preparation process is relatively simple, and the common methods include solid phase synthesis and gas phase deposition.
Ndfeb:
The main components consist of neodymium, iron, and boron. The chemical form is Nd₂Fe₁₄B.
It has a complex crystal structure, belongs to type 122 crystal structure, and is extremely powerful magnetic.
The production process usually involves high temperature melting and rapid cooling, and the production cost is high.
Permanent magnet ferrites perform well at high temperatures, often maintaining stable magnetism at temperatures of 200°C or more.
Ndfeb is easy to demagnetize at high temperatures, and the operating temperature is generally limited to between 80°C and 200°C, exceeding this range may lead to a decline in magnetic properties.
Permanent magnet ferrite:
Due to its low cost and high temperature resistance, ferrites are mainly used in inexpensive small motors, speakers, sensors, magnetic selective switches and other applications, suitable for mass production.
Ndfeb:
Due to its excellent magnetic properties, Ndfeb is widely used in high-performance motors, advanced audio, medical equipment, advanced sensors and other fields, especially in applications requiring small volume and high performance.
The production cost of permanent magnet ferrite is relatively low, not only rich in raw materials, but also simple production process, suitable for large-scale industrial applications.
The production cost of NdFeb is higher because the price of its rare elements (such as neodymium) is volatile and the production process is complex.
Ferrite is better in terms of environmental friendliness, while Ndfeb may have a certain impact on the environment during mining and refining, and neodymium-containing waste needs to be properly disposed of.
Permanent magnet ferrite and Ndfeb each have their own unique advantages and application scenarios. Permanent magnet ferrite is suitable for a wide range of industrial applications with its low price and high temperature stability, while NdFeb is used in high-tech fields where magnetic properties are extremely demanding due to its high magnetic energy product. According to the specific application requirements, the selection of the right permanent magnet material will be an important factor in achieving the best performance and cost effectiveness.
