Time:12/13/2018 12:46:02 PMauthor:source:
Bonded NdFeB permanent magnet material strong permanent magnet high temperature resistant without demagnetization
The production and application of bonded NdFeB permanent magnet materials are late, the application is not wide, and the dosage is small. It is mainly used in office automation equipment, Denso machinery, audio-visual equipment, instrumentation, small motors and metering machinery. In recent years, the application ratio of bonded NdFeB permanent magnet materials in China is 62% for computers, 7% for electronics industry, 8% for office automation equipment, 7% for automobiles, 7% for appliances, and 9% for others.
NdFeB magnets can be widely used in electric motors, engines, voice coil motors, magnetic resonance imagers, communications, control instruments, audio equipment and so on. Its main application area is VCM (voice coil motor), and about half of the sintered NdFeB magnets produced abroad are currently used for VCM. In addition to VCM, the most used fields are electric motors and generators. With the development of the automotive industry, the demand for NdFeB magnets in this field will increase significantly in the future. The rare earth permanent magnet motor has great market potential and is a huge field that has not been fully developed in China. At present, the rare earth permanent magnet motor has about 2 million kW, which is equivalent to 0.5% of the total capacity of various types of motors of 400 million kW. If a rare earth high-efficiency motor is used to replace 50% of the old J-JO and J2-JO2 series motors, that is, 100 million kW, about 50,000 tons of high-performance sintered NdFeB magnets are required. The rare earth permanent magnet high-efficiency motor can save 15% to 20% energy and reduce the weight of the motor by more than 20%. The rare earth permanent magnet high efficiency motor has been listed as a key project of the "Rare Earth Application Engineering" of the Ministry of Science and Technology.
The high-temperature demagnetization problem of NdFeB magnets is well known to us, combining the cost and performance of NdFeB magnets, making them a popular choice for the use of traditional magnets and creating new product applications, in the case of a sharp increase in existing strength Allows the use of a smaller magnet that is beneficial for most designs.
The handling procedure of NdFeB magnets at high temperatures requires care because NdFeB magnets tend to demagnetize at high temperatures. Below we will work with you to understand the high temperature demagnetization of neodymium iron boron magnets.
Since NdFeB magnets have a high content of barium iron, they are also susceptible to oxidation. Therefore, various coatings satisfying these conditions depend on the operating environment of NdFeB magnets.
Standard configuration: In general, NdFeB magnets are divided into two main column lists: discs and blocks.
The strength of these magnets requires careful handling. Small magnets attract, from a distance and large magnets, can cause pain and even break when damaged.
The new disc cylinder is called the "disc" and is generally marked by a height magnet with a diameter of the first cylinder, usually a tall cylindrical diameter. The new straight line is called a rectangular or square section with a variety of thickness options. Rare earth lanthanum cobalt bismuth (NdFeB) is an alternative, as samarium cobalt magnets can withstand higher temperatures, more corrosion resistant, and 钕Iron and boron are comparable. Strontium cobalt is more expensive than NdFeB, which is more sensitive to market prices. Samarium cobalt is used in computer disk drives, sensors, traveling wave tubes, linear actuators, satellite systems and some motors.
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