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Ferrite Magnets High Permeability
Oct 25, 2017

Ferrite Magnets High permeability

Frequently Asked Questions about Ferrite Magnets

1. Question: What is ferrite (pottery)?

A: ferrite magnets, also known as ceramic, is a mainly composed of hematite (Fe2)

2. Question: how to shield the magnet (ferrite / ceramic) magnetic field?

A: In general, we use iron pieces to shield the magnet's magnetic field (magnetism). The magnetrons need to be made of high permeability materials, and iron-nickel alloys can meet this requirement. When we need to shield the magnetic field is very strong, a single magnet block can not meet the requirements of magnetic isolation. In this case, we mainly use two methods to solve the problem. One method is to increase the thickness of the magnetically spaced iron plate; another more effective method is to use a shielding device, the specific method is between the two pieces of magnet pieces filled with aluminum and other high permeability materials. The use of shielding devices to achieve the magnetic isolation effect is much better than the use of separate magnetic discs, etc., magnetic isolation device can be magnet magnetic field to almost zero state.

3. Question: What do you need to pay attention to when storing and transporting ferrite (ceramic)?

A: ferrite (ceramic) must be stored in a dry, ventilated environment, otherwise the humid environment will quickly rust it.

At the same time, the ferrite storage environment temperature can not exceed the maximum operating temperature of ferrite, otherwise it will lead to product demagnetization.

Ferrite is generally not coated, in order to prevent it rust, we can put a layer of anti-rust oil on the surface of the magnet. After the magnetization of the ferrite must be away from the disk, magnetic cards, tapes, computer screens, watches and clocks and other objects susceptible to magnetic impact.

4. Question: What do you need to pay attention to when dealing with ferrite (ceramic)

A: When dealing with ferrite, first of all to ensure that the workplace clean, because the ferrite is easy to attract iron and other small objects, and these things will affect the use of magnets. When handling magnets with smaller magnets, be careful not to knock the damaged parts and cracks. When handling magnets with larger magnets, pay special attention to protect their own safety and avoid the two limbs attracting fingers and other limb parts due to suction.

5. Question: how to judge the ferrite (magnet) grades?

A: In general, we mainly through three parameters to determine the ferrite (magnet) grades. One of the parameters is remanence, in Gaussian units. Remanence is the magnet magnetization, the magnetic field in the case of disappearance of the magnetic induction strength. According to the remanence, we can determine the strength of the magnetic field. The second of the parameters is the coercivity, in units of Oster or Ann / m. The coercive force refers to the strength of the magnetic field that must be applied when the magnetic induction of the magnet which has been magnetized is reduced to zero. The coercive force represents the demagnetizing ability of the magnet. The third parameter is the maximum magnetic energy product, in kilojoules / cubic meters or megao as the unit. The maximum energy product is the maximum parameter of the total stored energy in the magnetic field generated by the ferrite (magnet) per unit volume. The larger the magnetic energy product is, the less magnetic material is required to produce the same effect.

6. Question: What is TDK ferrite (ceramic)?

A: TDK ferrite (ceramic) is a ferrite series, its grades range from the same personality to the FB1 to the anisotropic FB9. TDK ferrite (ceramic) has a wide range of applications, grades FB3 ferrite (dry anisotropic material) has the highest cost-effective, and can produce a variety of complex shapes, this ferrite is widely used in micro Motor. The ferrite (wet anisotropic material), grades FB4 ~ FB9, is mainly used for machining magnets with high remanence and high coercivity.

7. Question: What are the characteristics and applications of ferrite (ceramic)?

A: ferrite (ceramic) is a magnetic metal oxide. In terms of electrical performance, the ferrite has greater electrical resistance than metal and alloy materials, and it has high insulation properties. In high frequency applications, ferrite (ceramic) has a high permeability. Therefore, the ferrite / ceramic magnets have become widely used in the field of high-frequency weak non-metallic magnetic materials.


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