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Ferrite series
Authors：handler Time：2017-07-10 11-10-35
Permanent magnet ferrite is to SRO and Bao and Fe2O3 as raw material, made by ceramic technology (calcining, crushing, milling, pressing forming, sintering and grinding) manufacturing and has wide hysteresis loop, high coercivity and high remanence, the magnetization that is able to maintain a constant magnetic functional materials. According to different production technology, the permanent magnet ferrite is divided into two kinds of sintering and bonding. The sintering is divided into dry pressing and wet compression molding. Soft, elastic, and twisted magnets made of bonded ferrite powder and synthetic rubber are also known as rubber magnets. According to whether the external magnetic field is divided into isotropic permanent magnet and anisotropic permanent magnet.
The current era is the era of electronics, there is no permanent magnet oxygen body there is no electronic industry, permanent magnet ferrite as a basic functional material of the electronics industry, has penetrated into all fields of human production and life. Widely used in automobiles, motorcycles, televisions, stereos, computers, communication terminal, medical equipment and other aspects, it is an important aspect of energy development. From the point of view of resources, or from the perspective of energy and applications, the prospects for the development of permanent magnet ferrite are very broad, and the need to increase the amount of. Our 1995 permanent magnetic ferrite demand 4.5 million tons (pre sintered 5 million tons or so), 1997 demand 6-7 million tons (pre sintered 7-8 million tons), 15 million tons of demand in 2000 (pre sintered 18 million tons) "the Eighth Five Year Plan" period, China permanent ferrite total production has been gradually replaced "permanent magnetic kingdom" Japan, ranking first.
Preparation method of permanent magnet ferrite powder
At present, permanent ferrite prepared in various ways, but there are several methods are as follows: (1) chemical co precipitation method, (2) molten salt method, (3) glass crystallization method, (4) hydrothermal synthesis method, (5) sol gel method, (6) spray pyrolysis method, (7) with organic resin method, (8) self propagating high-temperature synthesis method.
New technology and new technology of permanent magnet ferrite
The way to improve the performance of the permanent magnet ferrite (1) to improve the orientation degree. (2) increasing sintering density. (3) improving the Kl Mn of the ferrite M phase. (4) to refine the grain size and improve the existence rate (5) of single domain particles ().
Permanent magnet ferrite is one of the biggest production of permanent magnetic materials. Since the permanent magnetic ferrite material since the advent of, and continuously improve the performance of technology, increasing product variety, manufacturing process of continuous improvement, constantly updated to use the equipment, expanding the scope of application, so social benefit and economic benefit are growing. In foreign countries due to the lack of raw materials, labor and the environment and other aspects of the restrictions, has no longer produce raw materials for such products, which are transferred to the third world. At present, in some of China's large and medium-sized factories using the strong capital and technological advantages, from abroad to buy key production equipment and domestic version of equipment and domestic auxiliary equipment itself to form a complete set of advanced production lines. Some township enterprises and individual enterprises use large and medium-sized enterprise technical force and science and technology, the use of traditional equipment and cheap human resources and management of variety and flexibility advantages, and the yield increased sharply, is expected to in the next few years will also have a further rise in the trend.
The current era is the era of electronics, there is no permanent magnet oxygen body there is no electronic industry, permanent magnet ferrite as a basic functional material of the electronics industry, has penetrated into all fields of human production and life. Widely used in automobiles, motorcycles, televisions, stereos, computers, communication terminal, medical equipment and other aspects, it is an important aspect of energy development. From the point of view of resources, or from the perspective of energy and applications, the prospects for the development of permanent magnet ferrite are very broad, and the need to increase the amount of. Our 1995 permanent magnetic ferrite demand 4.5 million tons (pre sintered 5 million tons or so), 1997 demand 6-7 million tons (pre sintered 7-8 million tons), 15 million tons of demand in 2000 (pre sintered 18 million tons) "the Eighth Five Year Plan" period, China permanent ferrite total production has been gradually replaced "permanent magnetic kingdom" Japan, ranking first.
Preparation method of permanent magnet ferrite powder
At present, permanent ferrite prepared in various ways, but there are several methods are as follows: (1) chemical co precipitation method, (2) molten salt method, (3) glass crystallization method, (4) hydrothermal synthesis method, (5) sol gel method, (6) spray pyrolysis method, (7) with organic resin method, (8) self propagating high-temperature synthesis method.
New technology and new technology of permanent magnet ferrite
The way to improve the performance of the permanent magnet ferrite (1) to improve the orientation degree. (2) increasing sintering density. (3) improving the Kl Mn of the ferrite M phase. (4) to refine the grain size and improve the existence rate (5) of single domain particles ().
Permanent magnet ferrite is one of the biggest production of permanent magnetic materials. Since the permanent magnetic ferrite material since the advent of, and continuously improve the performance of technology, increasing product variety, manufacturing process of continuous improvement, constantly updated to use the equipment, expanding the scope of application, so social benefit and economic benefit are growing. In foreign countries due to the lack of raw materials, labor and the environment and other aspects of the restrictions, has no longer produce raw materials for such products, which are transferred to the third world. At present, in some of China's large and medium-sized factories using the strong capital and technological advantages, from abroad to buy key production equipment and domestic version of equipment and domestic auxiliary equipment itself to form a complete set of advanced production lines. Some township enterprises and individual enterprises use large and medium-sized enterprise technical force and science and technology, the use of traditional equipment and cheap human resources and management of variety and flexibility advantages, and the yield increased sharply, is expected to in the next few years will also have a further rise in the trend.
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