Alnico magnet

The nature and effect of the magnet: 1. magnet has two poles N, S are still poles N, S pole after a single cut can not exist 2. permanent magnetic field lines describe the magnetic field can be used to put a piece of paper on the magnet, sprinkle with.... iron tap, you can see both ends of the magnetic field lines geometric curve most dense, magnetic strongest, called N-pole magnetic pole magnetic field lines out into the S pole (external);. The interior is between N pole 3. S extreme poles. Interactions: magnetic repulsion of the same name; synonym poles attract 4. magnet attracts iron, cobalt, nickel magnetic substance 5. magnets are: bar, hoofed, needle-shaped magnet 6. directivity: Indicates the north-south direction. 7. carrying conductor in the magnetic field, and subjected to a magnetic force, the occurrence of movement, the left hand can be used is determined by the direction of the force. According to this case can be made motors, instrumentation table top. 8. The closing part of the circuit conductor in motion in the magnetic field generating induced current, called electromagnetic induction. induced current directions available right-hand rule to determine. According to this reasoning can be made generators. 9. Electrical and magnetic system through a variety of means can be converted to each other, energizing solenoid can be made a magnet, such as electromagnetic cranes. ferrite magnet material (Ferrite) 1. NdFeB magnets which is found in the commercialization of the highest performance magnets, known as magnetic king, have extremely high magnetic its biggest energy product (BHmax) higher than the ferrite (Ferrite) more than 10 times. Machining performance itself is also very good. Operating temperature up to 200 degrees Celsius. And its hard, stable performance, good price, so its application is extremely broad. But because of its chemical activity is very strong, it must deal with its surface coating. (E.g. plating Zn, Ni, electrophoresis, passivation, etc.). 2. It is the main raw materials include ferrite magnets BaFe12O19 and SrFe12O19. Manufacturing method made by ceramic technology, texture rather hard, is a brittle material, since the ferrite magnets have good temperature resistance, low cost, moderate performance, has become the most widely used permanent magnets. 3. Alnico magnet is an alloy of aluminum, nickel, cobalt, iron and other trace metal elements. Casting process can be processed into different sizes and shapes, very good processability. Cast aluminum nickel and cobalt permanent magnet has a low reversible temperature coefficient, working temperature up to 600 degrees Celsius. Alnico magnet products are widely used in various instruments and other applications. 4. Samarium cobalt (SmCo) on the basis of different components into SmCo5 and Sm2Co17. Because of its materials are expensive and their development is limited. Samarium cobalt (SmCo) as a rare earth permanent magnet, not only has a higher energy product (14-28MGOe), reliable coercive force and excellent temperature characteristics. Compared with NdFeB magnets, SmCo magnet is more suitable for working in high temperature environments.