Box-shaped magnet

Magnet magnet known, refers to the presence of objects or materials in a magnetic field around and within itself, is divided into two major categories of natural and man-made. Artificial magnets usually made of metal alloys having a ferromagnetic. It can be divided into a "permanent magnet" and "non-permanent magnet," or "hard magnetic" and "soft." Natural magnet main ingredients: iron oxide, the chemical formula Fe3O4, often referred to as "the magnetic iron oxide." Magnetic black crystals. Compound ferrous oxide and iron oxide can be seen as. Because the iron oxide crystals in the presence of two different valence states of ions, a third of Fe2 +, two-thirds of Fe3 +, is a complex compound. It is insoluble in water, it can not react with water. And an acid, alkali-insoluble. The main system for primer and topcoat, magnetic materials for the electronics industry, but also for anti-rust agent construction industry. Ferrite permanent 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.