1. Alnico alnico is made of aluminum to nickel-iron alloy development, the current model can be made of aluminum, nickel and cobalt alloys are mainly LNG34, LNG52, LNGJ32, LNGJ56 like. Since the main characteristic is the high Alnico Br, low Hc of permanent magnet material, the relative magnetic permeability of 3 or more magnets Hengli tool manufacturers, so in the specific application, the magnetic pole to be done to grow long rods or rod, to minimize the effect of demagnetizing field. Alnico magnet itself low coercivity, so in the course should be strictly prohibits any contact with Alnico magnet iron material, in order to avoid leaving permanent partial demagnetization magnetic circuit flux distribution is distorted. Advantages Alnico magnet temperature coefficient, and the permanent characteristic degradation due to temperature changes occur is small, but the material is hard and brittle magnet bridge tool manufacturers, processing difficulties. 2. Ferrite permanent magnetic materials ferrite permanent magnet materials is one of the widely used permanent magnet materials, its main ingredient is MoFe2O3. This has the advantage that: (1) a large coercive force Hc. Ferrite permanent magnet material coercive force Hc between alnico material and rare earth cobalt permanent magnet material. Due to its low residual magnetism, it is generally designed to fit flat shape; (2) Light weight, density (4.6 ~ 5.1) × 103 kg / m3; rich (3) sources of raw materials, cheap, resistant to oxidation and corrosion; (4) large crystal magnetic anisotropy constant; (5) the demagnetization curve is approximately linear. The disadvantage is a low remanence, temperature coefficient, friable. But to explain this permanent magnet produces a magnetic field and how to obtain a magnetic field interacting with the ability, you have to be a lot of 20th-century physics by means of the job. All of this comes from the behavior of electrons inside atoms in solids. The quantum theory and Einstein's theory of relativity guidelines apply these electrons, you will find that they behave like a small bar magnet that points either up or down, depending on the value of the electron spin. In most materials, the number of electrons in each point of each half, so overall not exhibit magnetic effect. But some elements, such as iron, and its neighbors in the periodic table - cobalt and nickel, if all the atoms in the outermost row of stone tools magnet factory, which is involved in chemical bond formation of electron spin directed parallel to each other, it will reduce the overall energy. As long as firmly fixed in one of these electrons are free to flip a solid lattice, then add a little field, solid these elements will be able to generate its own magnetic field, and keep it consistent. Thus, you get a permanent magnet. Bridge tool magnet manufacturers, new and Tong Xin magnetic tool magnet provided by the Dongguan City Tong Xin magnetic Limited. Dongguan City, Tong Xin magnetic Limited (www.dgxtxmagnet.com/) Dongguan, Guangdong, magnetic leader, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. New Tong Xin magnetic leadership with the staff warmly welcome all inquiries to discuss, with new magnetic Xin Tong better future.