As the oldest commercially available permanent magnets, AlNiCo alloys are mainly composed of Al, Ni, Co and Fe. In addition, additive elements like Cu, Ti, and Nb can accelerate the growth of needle phase and hence enhance coercivity. Various grades of AlNiCo magnets are not merely having different composition, but also have its own specific heat treatment parameters. AlNiCo magnets can be further classified to isotropic magnet and anisotropic magnet according to whether apply magnetic field or not. The Curie temperature of AlNiCo alloy is up to 890 degrees Celsius. AlNiCo magnets naturally possess an excellent heat resistance, temperature stability, and anti-corrosion performance. AlNiCo magnets are still occupying a certain market share in high temperature applications even sintered Samarium Cobalt magnets and sintered Neodymium magnets successively greatly compressed its market share. AlNiCo micro magnet is also called AlNiCo micro precision magnets, AlNiCo miniature magnets, AlNiCo mini-sized magnets, or AlNiCo tiny magnets. AlNiCo magnets can be manufactured by either sintering process or casting process, and material of AlNiCo mini magnets is generally select cast AlNiCo magnets. AlNiCo micro magnet is offered in AlNiCo micro ring magnets, AlNiCo micro disc magnets, and AlNiCo special shaped magnets. AlNiCo micro magnets are popular and widely used in sensors, consumer electronics, meters, and many other applications.
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