Permanent ferrite magnet industry overview
1. Comparison of rare earth permanent magnet materials
Permanent ferrite magnet , also known as hard ferrite, is a new type of non-metallic magnetic material, which can generate a stable magnetic field with only one external supply of magnetizing energy, thereby continuously providing magnetic energy to the outside. Permanent magnet ferrite has rich sources of raw materials, low price, simple production conditions, controllable process and strong corrosion resistance of the product. In addition, the permanent magnet ferrite material is only doped with a small amount of Co, Ni and expensive rare earth elements during the ion substitution process, so the cost is greatly reduced compared with the former; and the price per unit magnetic energy product is low, and it is corrosion-resistant and suitable for Harsh working environment and other advantages. For this reason, permanent magnet ferrite is currently the most widely used permanent magnet material, and has occupied a dominant position in production and application. Widely used in various fields such as electronics, electricity, machinery, transportation, medical treatment and daily necessities.
Comparison of permanent ferrite and rare earth permanent magnet materials
2. Industrial mass production process
The solid phase method, also known as the ceramic method, is the most important method for mass production of ferrite materials in industry. The principle of sample preparation by this method is to use molecules, atoms and ions in powder ingredients to realize a series of physical and chemical reactions between different substances through thermal diffusion, thermal decomposition and recrystallization. The appearance of samples prepared by this method is similar to pottery materials, so it is also called ceramic method. The solid-phase method refers to the method of mixing the materials according to the molar ratio, and preparing ferrite through a series of processes such as ball milling (according to the performance requirements of the sample, it can be divided into dry milling and wet milling), pre-calcination, crushing and sieving.
2. Policies related to magnetic materials
In 2010, the State Council’s “Decision on Accelerating the Cultivation and Development of Strategic Emerging Industries” listed energy conservation and environmental protection, new generation information technology, biology, high-end equipment manufacturing, new energy, new materials, new energy vehicles and other industries as strategic emerging industries , Accelerate the cultivation to become a leading industry and a pillar industry. During the “14th Five-Year Plan” period, it is necessary to strictly control the excessive growth of the total production capacity of magnetic materials,
To avoid market supply and demand imbalance and vicious competition caused by excessive production capacity growth, focus on structural reforms on the supply side of the industry, continuously optimize industry production capacity and product structure, and increase effective supply. In recent years, the main policies of my country’s magnetic materials include:
3. Industrial chain of ferrite permanent magnet industry
The upstream of permanent magnet ferrite is mainly steel plants, iron red materials and pre-fired materials, and the main downstream products are shaded pole motors, synchronous motors, cooling valve actuators and AC blowers, etc., which are mainly used in automobiles, home appliances and other industries.
Ferrite permanent magnet materials are the earliest industrialized permanent magnet products in China. They are mainly used in fields such as motors, acoustic wave equipment, and consumer electronics. The demand accounts for 25%, 20.4%, and 17.2% respectively.
Downstream demand structure of permanent magnet ferrite
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