Introduction to ndfeb permanent magnet material in the application of electronic technology
Guangdong magnet - ndfeb (ndfeb) belongs to the third generation of rare earth permanent magnet materials, has small volume, light weight and the style of the strong magnetic,'s function is the best magnet, so far in the magnetic field is known as the king of magnetic. The advantages of high energy density of nd-fe-b materials in modern industry and widely used in electronic technology.
In everyone's life at ordinary times, small to watches, mobile phones, cameras, telephones, tape recorder, accounting machine drives, cd-rom drives, big to cars, generators, medical equipment, aviation spacecraft, such as permanent magnet materials are everywhere. Just because of the widespread adoption of the rare earth permanent magnet materials, the scale of the many electronic products to further reduce, function improved significantly. Thus accustomed to the modern electronic products light, thin, small development trend. Nowadays, the fruit of the rare earth permanent magnet materials and application, has become to measure a nation's comprehensive national strength and national economy development level important symbol.
Has a broad market in China bicycle as an example, the bicycle is the traditional pillar industry in China, electric bicycles development beginning in 1998, annual output of only 54000 cars at that time, and to 2004 annual output 5 million units, 0.3 kg per bike uniform demand of sintered ndfeb accounting, need 1500 tons of magnets, or blank is 2500 tons.
The car industry is one of the category of nd-fe-b use more. In every car, generally speaking, there are 30 parts by using permanent magnet. The number of foreign luxury cars, it is said, in the use of micromotor is as high as 70, to end all kinds of control action on the car. Now all the annual output of 55 million cars, according to each use uniform motor number from the original 20, to add to the 30, 2005, demand of motor number add only from 800 million to 1.6 billion. With the car towards miniaturization, lightweight and high functionality, using magnet function request in car is also more and more high, this will accelerate nd-fe-b, especially the development of the bonded ndfeb permanent magnet. If bonded ndfeb magnets in cars add 50%, 102 g, every car demand by the global annual production capacity of 55 million cars above calculation, demand of about 5600 tons of anisotropic ndfeb magnet.
Profession, especially the motor with high function of permanent magnets, is bound to lead to motor professional endless changes. Estimate whether it is a dc motor is still communication, eventually will transition to the rare earth permanent magnet motor. Authoritative experts predict, rare earth permanent magnet materials in this century, to the use of motor and plays the role of revolutionary. All sorts of use of rare earth permanent magnet motor will enter a new development stage.
With the advent of the information age, the accounting machine into the family is now constitute a boom. According to the market survey, in 2000 the international household PCS total sales of 40 million units, 2005 about 2005 units. Accounting machine to carry out the led on supporting the development of the components, the hard, floppy disk, CD drive head is using ndfeb more one aspect, a year of ndfeb magnet is used for accounting machine drives about 4000 tons, accounting for 50% of the sales of the summary. In 1999, the global output of HDD for 165.7 million, 16% more than in 1998. Now the HDD is large capacity, high speed data transmission and save space development direction.
Rare earth ndfeb new increasing point in constantly emerging, because our country has rich rare earth capital, 70% of the world's rare earth spread in our country, baiyun obo, shanxi and jiangxi gannan region of Inner Mongolia, for our country to develop rare earth permanent magnet industry laid a solid foundation. Now, our country is now constitute its ndfeb industry system, relying on capital and capital advantage, professional to develop rapidly, especially in the 21st century, in the future career in magnetic data in China increase rate is over 20%. Estimate the next five to ten years, our country will become the international first-class rare earth permanent magnet materials supply base.
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