Other ancient literature such as "Shan Hai Jing" also has a similar record. Magnetic properties of iron absorption was found very early, "Lu" chapter nine volumes have proficient: "chee move iron, or lead it too." At the time called the "magnetic" to "chee" They put a magnet to attract Iron seen as mother to attract children. And said: "Stone is the mother of iron magnets, but 石有慈 two and has not been kind, loving stone to attract his children, has not been kind of stone can not be attracted." Chinese people before the magnet is written 'chee stone "low price supply toys with magnets, is the meaning of love stone. North also three hundred and twenty years, Hill said irrigation problems of its multi ailanthus Zhe, under which more than quicksand, multi-Tobe. There are animal behavior, its like a cow and a white tail, it sounds like Jiao, the name that the Father. Yan Jiang million bags bird magnet, its like a female pheasant and faces of the people, to see people you jump, the name startled Adams tool magnet Which is good, since the Ming call also. Carpenter Han water out of Yan, while the West streamer in Ao Chak, where more magnet. Notes ③ magnet: Also as "chee Stone", a natural mineral, has attracted iron, nickel, cobalt and other metal material properties. Commonly known as a magnet, now known as magnetite. Compass, one of the four ancient Chinese invention, the system is the use of magnets made. Highest performance NdFeB magnetic one is soft, Mgnet magnet now two main categories. A magnet is hard magnetic. The concept includes soft silicon and which, soft core; hard magnetic including aluminum, nickel and cobalt samarium cobalt ferrite and NdFeB. The most expensive samarium cobalt magnet highest performance NdFeB magnets, ferrite magnets cheapest. However, the temperature coefficient of performance Alnico best and most stable. The user can select a different hard magnetic products according to different needs. Said magnet means are permanent magnet generally magnet. Permanent magnet is divided into two large magnets classification. The first category includes metal alloys NdFeB magnets NdFeB magnets SmCo magnets Alnico magnets Sm LNi second highest performance category ferrite magnets NdFeB magnetic material Ferrit. NdFeB magnets found in the commercialization of the highest performance magnets. Magnetic energy has a high maximum energy product BHmx than Ferrit times higher than the ferrite. Machining performance itself is also very stable, currently known as Magneto. The so its application is extremely broad. But because of its chemical activity is very strong, good. Operating temperature up to degrees Celsius. And its texture. There is a very good price. So essential to its texture rather hard, is a brittle material, from the appearance of the highest performance NdFeB magnet magnetic tool Which New Tong Xin _ _ magnet magnetic provided by the Dongguan City, Tong Xin magnetic Limited. Xin Tong, Dongguan City, the new magnetic Limited (www.dgxtxmagnet.com/) strong, credible, in Dongguan, Guangdong magnetic materials industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the new Tong Xin magnetic and you hand into the brilliant, for a better future!