Alnico Ring Magnet
Alnico ring magnet is an alloy made of materials such as aluminum, nickel, cobalt, copper, iron, etc. According to different processing techniques, it is divided into two types: cast Alnico magnet and sintered Alnico. Widely used in aerospace, military, internal magnetic voltage and current meters, electronic energy meters, multimeters, flow meters, etc; Various magnetic sensors, polarization relays, temperature and pressure controllers; Mobile phone buzzer, hearing aid, receiver, miniature speaker; Car ignition starter, odometer for cars and motorcycles, etc.
Products Description
What Are Alnico Ring Magnets?
Alnico ring magnets are permanent magnets made from an alloy of aluminum (Al), nickel (Ni), and cobalt (Co), with additional elements like iron, copper, and titanium. These magnets are shaped into rings, featuring a central hole that allows for unique applications requiring a radial magnetic field or integration with other components. The ring shape makes them ideal for applications where a focused, directional magnetic field is needed.
About this product
|
Diameter |
0.312 in, 0.525 in |
|
Inside Diameter |
0.13 in, 0.25 in |
|
Thickness |
0.125 in, 0.15 in |
|
Wt. (lbs) |
0.032, 0.102 |
Alnico ring magnets have a circular shape and a hollow center, allowing them to be strung or threaded onto string, rod, or wire. Alnico ring magnets are desirable for their high residual induction, high energies, corrosion resistance, and for the fact that they have the widest temperature stability out of any standard magnetic material.
Alnico magnets have the best temperature coefficients of any magnet material.
Alnico magnets should be regarded as the best choice in extremely high temperature applications.
They can be produced by Casting or Sintering. Cast Alnico is the most common form of Alnico magnet. Casting is often used to get "near net shape" Alnico magnets. Casting Alnico is cost effective for both low and high volume, for small and very large magnets. Sintered Alnico magnets are not so commonly used due to lower magnetic performance and limitation to simpler shapes. Anisotropic magnets have the direction of magnetisation (DoM) permanently within the structure and give the maximum performance.
Applications of Alnico Ring Magnets
Alnico ring magnets are widely used across various industries due to their unique shape and exceptional performance. Some of their most common applications include:
Industrial Equipment: They are used in motors, generators, sensors, and magnetic couplings due to their strength and reliability.
Consumer Electronics: Alnico ring magnets are found in speakers, microphones, and other audio devices, where they deliver high-quality sound reproduction.
Medical Devices: Their stability and precision make them suitable for medical equipment like MRI machines and surgical tools.
Scientific Research: Alnico ring magnets are used in laboratory experiments, magnetic separators, and precision instruments.
Automotive Industry: They are used in sensors, actuators, and other components requiring a reliable magnetic field.
Hobby and DIY Projects: Their unique shape and strong magnetic field make them popular for crafting, modeling, and educational purposes.
What are the types of aluminum nickel cobalt permanent magnets?
It can be mainly divided into two categories: cast aluminum nickel cobalt and sintered aluminum nickel cobalt. The shape of cast aluminum nickel cobalt magnets can be diversified and complex. The mechanical dimensional tolerances of sintered aluminum nickel cobalt can be controlled more accurately.
What are the applications of aluminum nickel cobalt magnets?
Cast aluminum nickel cobalt products are mainly used in automotive parts, instruments and meters, acoustics, motors, education, aerospace and military fields. Sintered aluminum nickel cobalt is widely used in motors (now gradually being replaced), instruments and meters, communications, magneto electric switches, and various sensors
What shapes can aluminum nickel cobalt magnets be processed into?
The shapes that can be produced include cylindrical, circular, rectangular, flat, tile shaped, and horseshoe shaped.
How are aluminum nickel cobalt permanent magnet materials generally processed and produced?
Aluminum nickel cobalt permanent magnet materials have low mechanical strength, high hardness, brittleness, and poor machinability. During processing, only a small amount of grinding or electrical discharge machining can be performed, and forging and other mechanical processing cannot be used.
FAQ:
What are Alnico Magnets drawbacks?
The intrinsic coercivity of Alnico is very low, usually less than 160kA/m. Its demagnetization curve is a nonlinear change, and the recovery line of aluminum nickel cobalt permanent magnet does not coincide with the demagnetization curve. Therefore, special attention should be paid to its particularity in the design and manufacturing of device magnetic circuits, and the permanent magnet must be stabilized in advance. Based on the low coercivity of aluminum nickel cobalt permanent magnet materials, it is strictly prohibited to come into contact with any ferromagnetic material during use to avoid local irreversible demagnetization or distortion of magnetic flux density distribution. In addition, in order to enhance its anti demagnetization ability, the aluminum nickel cobalt permanent magnet pole surface is often designed in the form of long columns or rods
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