China Neodymium And Ferrite Magnets Manufacturer & Supplier 
There are so many questions about magnets that I have brought them together in the Magnet FAQ section, and this page lists 10 common questions about magnet applications.
1、Which magnet should I choose?
If you need the highest performance magnet, of course it is not NdFeB. However, there are many comprehensive factors to be considered for the application of magnetic materials. Therefore, it is not simple to choose the highest performance on everything, it is recommended that you provide your application to the manufacturer, so that manufacturers to provide reasonable advice (however, the domestic application of magnets for the study is very little, many manufacturers can not give customers a reasonable proposal, which, compared with Europe and the United States lagged behind a lot, which restricts the application of magnetic materials in the field of product development)
2、How high is the working temperature of magnet?
Different types of magnets, the working temperature varies greatly. The same material, different performance levels are not the same. Take NdFeB as an example, the highest working temperature: about 80-220℃.
3、What are the fixing methods for magnets?
Generally the way of bonding is used. Nowadays, the performance of adhesive is very good, and if the process is reasonable, there is basically no need to worry about the magnet falling off. Welding is not possible. At least I haven't seen a successful precedent. Certain magnets, can be punched, etc., so they can be fixed mechanically, such as NdFeB.
4, Relationship between the strength and hardness of the magnet?
Strength is related to magnetic properties, including flux density, coercivity and maximum magnetic energy product. The hardness is related to the mechanical properties of the material, which indicates its ability to resist deformation and wear. The Vickers and Mohs hardness of samarium cobalt magnets are higher than that of NdFeB.
5、Magnet processing performance
Magnets have high hardness and are difficult to be processed by cold cutting. Common processing methods are diamond blade cutting, wire cutting, grinding, etc.
6、What are the advantages of using permanent magnet materials
Many occasions of electromagnetic applications, can be used to replace the permanent magnet. Somewhat such as: no power consumption, no heat (this is very important), do not have to worry about power outages and so on. Such as, electromagnetic suction cup has a big problem, is the power failure protection. So electromagnetic lifting generally need uninterruptible power supply, resulting in increased costs. The use of permanent magnetic suction cups, there is no such worries.
7, How long is the life of the magnet?
There are two main factors affecting its life: corrosion and demagnetization.
Easy to corrode the magnet, plating or the material itself is not good, it may not be used for a year on the powder off, such as neodymium iron boron. Powder metallurgy products, unlike casting products, are loosely bonded internally. There is high internal stress inside the magnet. Therefore the microscopic particles always tend to go apart. With oxidation, they may soon become powder.
Another point is demagnetization. Demagnetized magnets, especially high-temperature demagnetization, the internal phase transition, even if re-magnetization, can not restore the original performance.
8、Can a magnet be re-magnetized?
Permanent magnets can be re-magnetized by a strong external magnetic field, especially if their original magnetism is weakened. However, not all types of magnets are suitable for remagnetization, depending on the material and structure of the magnet.
9. Why do some magnets have many poles?
Yes, this is mainly to meet the performance requirements in specific applications, such as motors, sensors, encoders, can be single-sided or double-sided multi-pole, need to be magnetized fixture to achieve.
10, What can magnets be made into?
In fact, the application is really wide: permanent magnet motors, magnetic cranes, magnetic suction cups, magnetic actuators (synchronous drive, hysteresis drive, eddy current drive), magnetic springs (when attracted to each other, the curve is opposite to the shape of the tension spring), safety sensors, sensors, iron removers, mineral separators, daily necessities, toys, tools and so on.
The website has been posted with related magnet application questions;