Alnico magnet

basic information

1. Alnico magnets, which have a long history, are metal magnets with relatively high Br. They are primarily composed of aluminum, nickel, cobalt, and iron, and are manufactured through casting or sintering. Most materials have a Br that exceeds 10,000 (G). 2. Resistant to temperature changes. The temperature coefficient of Br is -0.02%/℃, which is the smallest, making it a magnet with minimal reversible temperature changes. The temperature coefficient of Hcj is nearly zero up to around 600℃, allowing for high-temperature use. 3. Prone to demagnetization from external magnetic fields and mechanical shocks. Due to the small value of Hcj, caution is needed as it is easily demagnetized by external reverse magnetic fields. Mechanical shocks can easily lower Hcj, so care must be taken with mechanical vibrations and impacts. 4. There are limitations on shape. Because of the small value of Hcj, it is necessary to have a larger height dimension in the magnetization direction. Depending on the shape, there may be restrictions due to casting molds or dies, but dimensional accuracy can be finished to a high level through polishing.

Price range

P1

Delivery Time

P4

※Sintered Alnico takes about 25 days, while cast Alnico magnets take about 45 to 60 days.

Applications/Examples of results

The stability against temperature is exceptionally good, and there is a strong demand, especially for measuring instruments. For example, this magnet is used in the electric meters found in many households.

Detailed information

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  Alnico Magnet Bar Type A circular type of alnico magnet made from aluminum, nickel, and cobalt, produced through casting or sintering. 【Features】 - Although it has the disadvantage of being prone to demagnetization, it is strong against high temperatures (Curie point 850°C) and has excellent mechanical strength, making it less likely to break. 【Applications】 - It has a strong popularity in various meters and the communications field, as well as in devices such as energy meters and security equipment.

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  Alnico Magnet Ring Type 【Features】 - Alnico magnets are made by casting, which gives them excellent properties against temperature changes. They are often used in applications where stability and precision are required, but they have the disadvantage of being prone to demagnetization.