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Sintered AlNiCo Magnets
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Sintered AlNiCo Magnets,Alnico Magnets |
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| Young Magnet offer many grades of Alnico magnets. Alnico is an acronym[1] referring to a family of iron alloys which in addition to iron are composed primarily of aluminium (Al), nickel (Ni) and cobalt (Co), hence al-ni-co. They also include copper, and sometimes titanium. Alnico alloys are ferromagnetic, with a high coercivity (resistance to loss of magnetism) and are used to make permanent magnets. Before the development of rare earth magnets in the 1970s, they were the strongest type of magnet. Other trade names for alloys in this family are: Alni, Alcomax, Hycomax, Columax, and Ticonal.The composition of alnico alloys is typically 8�2% Al, 15�6% Ni, 5�4% Co, up to 6% Cu, up to 1% Ti, and the balance is Fe. The development of alnico began in 1931, when T. Mishima in Japan discovered that an alloy of iron, nickel, and aluminum had a coercivity of 400 oersted (Oe; 32 kA/m), double that of the best magnet steels of the time.Magnetic Properties of Sintered Alnico MagnetAlnico alloys make strong permanent magnets, and can be magnetized to produce strong magnetic fields. Of the more commonly available magnets, only rare-earth magnets such as neodymium and samarium-cobalt are stronger. Alnico magnets produce magnetic field strength at their poles as high as 1500 gauss (0.15 tesla), or about 3000 times the strength of Earth's magnetic field. Some brands of alnico are isotropic and can be efficiently magnetized in any direction. Other types, such as alnico 5 and alnico 8, are anisotropic, with each having a preferred direction of magnetization, or orientation. Anisotropic alloys generally have greater magnetic capacity in a preferred orientation than isotropic types. Alnico's remanence (Br) may exceed 12,000 G (1.2 T), its coercivity (Hc) can be up to 1000 oersted (80 kA/m), its energy product ((BH)max) can be up to 5.5 MG·Oe (44 T·A/m). This means alnico can produce a strong magnetic flux in closed magnetic circuit, but has relatively small resistance against demagnetization.Alnico alloys have some of the |
| Company: |
Shanghai Young Magnet Co.,Ltd
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| Contact: |
Ms. Wong Evening |
| Address: |
No.147,Zhou Kang Rd.,Lane869,Pu Dong New Dist.,Shanghai,China |
| Postcode: |
201318 |
| Tel: |
86-021-28901397 |
| Fax: |
86-021-20943039 |
| E-mail: |
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