China Sichuan Xinheng Magnetic Materials Co., Ltd Company News

Rare earth refers to the lanthanide elements in the periodic table-lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium ( Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), and two closely related elements of the lanthanide series There are 17 elements-scandium (Sc) and yttrium (Y). Rare earth permanent magnetic materials refer to magnetic materials made of alloys formed by rare earth metals and transition metals through a certain process. They are widely used in computers, automobiles, instruments, meters, household appliances, petrochemicals, medical care, aerospace and other industries. All kinds of special motors, nuclear magnetic resonance equipment, electrical devices, magnetic separation equipment, magnetic machinery, magnetic therapy equipment and other components that need to generate a strong gap magnetic field. 　　NdFeB permanent magnet material is a rare earth iron permanent magnet material represented by neodymium iron boron (Nd-Fe-B). Depending on the production process, NdFeB permanent magnet materials can be divided into two types: sintering and bonding. The sintered NdFeB permanent magnet adopts powder metallurgy technology. The smelted alloy is made into powder and pressed into a compact in a magnetic field. The compact is sintered in inert gas or vacuum to achieve densification, and in order to improve the coercivity of the magnet , Usually requires aging heat treatment. The bonded NdFeB permanent magnet material is a mixture of NdFeB permanent magnet powder and resin, and pressed into a shape in a magnetic field.

1. Samarium cobalt permanent magnet has high magnetic energy product and high coercivity, its magnetic performance is better than alnico permanent magnet, ferrite permanent magnet, the maximum energy product can reach 239kj/m3 (30mgoe), it is alnico8 permanent magnet 3 times that of ferrite permanent magnets (y40), 8 times that of ferrite permanent magnets (y40). Therefore, permanent magnet components made of smco permanent magnets are small in size, light in weight and stable in performance. They can be used in electro-acoustic telecommunication devices, motors, measuring instruments, gyroscopes, and electronics. Clocks, microwave devices, magnetic machinery, sensors and other static or dynamic magnetic circuits. 　　2. The samarium cobalt permanent magnet has a high Curie temperature and a small temperature coefficient, so it can be used at a high temperature of 300℃. 　　 3. Samarium-cobalt permanent magnets have high hardness, high brittleness, low bending strength, tensile strength and compressive strength, and should not be used as structural parts. 　　4. The main component of samarium cobalt permanent magnet is metallic cobalt (co≥99.95%), so the price is more expensive.

  The periodicity of the high-performance NdFeB permanent magnet material industry fluctuates with the fluctuation of the downstream industry. Although the development cycle of the downstream industry is not the same, it generally fluctuates with the fluctuation of the economic cycle. As the downstream new energy and energy conservation and environmental protection sectors belong to the industries encouraged and supported by my country's industrial policies, they will maintain rapid development for a long time in the future. Therefore, the high-performance NdFeB permanent magnet material industry is not significantly affected by economic cycle fluctuations.

  A. Current status of the magnetic material industry 　　 1. Product output and output value do not fit 　　 my country's magnetic material industry has begun to take shape in terms of output, but it has not yet formed strong international competitiveness in high-end products. 　　2, the performance of magnetic products is low The production performance of 　　 neodymium iron boron magnets is generally around N35 (the magnetic energy product is 35MGOE), N40 or higher and the high coercivity grade N38H. Only a few companies can produce N32SH. The new grades introduced abroad have reached N50 and N48H.       3. The production process and equipment are relatively backward 　　 The total sales of special equipment for magnetic materials in my country has reached 143 million yuan, which can provide complete sets of production equipment. Therefore, domestic companies should try to use continuous production lines with a high degree of automation to reduce the influence of human factors and ensure product consistency.   B.  Development direction Soft ferrite At present, the most widely used soft ferrites can be divided into: manganese-zinc power ferrite materials, communication and electromagnetic compatibility (EMC) manganese-zinc high permeability ferrite materials, and manganese-zinc ferrite materials for deflection coils. It is divided into four categories: ferrite materials, radio frequency broadband and electronic interference (EMI) suppression nickel-zinc ferrite materials. Materials are further developed towards high frequency, high permeability and low loss, that is, two highs and one low. Devices are developing in the direction of miniaturization, chip and surface mount.   Permanent ferrite material 　　 Due to the increasing demand for high-end magnets for automobiles and computers, the proportion of high-end permanent ferrites in China will rise rapidly. It is expected that the proportion of Y30H-1 series of high-end products during the "Tenth Five-Year Plan" period will increase from about 40% in 2000 to more than 60% in 2005 (about 126,000 tons). The output of Y30H-2 and above series of high-end products can reach 10 % (Approximately 21,300 tons), the overall export proportion increased to more than 50%.