Intelligent nano powder demagnetizing device and demagnetizing method

Abstract

The invention discloses an intelligent nano powder demagnetizing device. The intelligent nano powder demagnetizing device comprises a control module, an amplitude amplification module, a power amplification module and a demagnetization coil; the signal output end of the control module is connected with the signal input end of the amplitude amplification module; the signal output end of the amplitude amplification module is connected with the signal input end of the power amplification module; and the power amplification module is electrically connected with the demagnetization coil. The invention further discloses a demagnetizing method; and the control module generates a sine wave signal according to an input control command, amplitude amplification and power amplification are carried outon the sine wave signal, and then the processed sine wave signal is input into the demagnetization coil to generate a demagnetization magnetic field. The device and the method have the advantages that the frequency, the demagnetization time, the demagnetization times, the strength of the demagnetization magnetic field and the like of the demagnetization current can be accurately controlled, different demagnetization schemes can be formulated according to different demagnetization objects, and the method is especially suitable for nano-scale powder demagnetization.

Description

technical field [0001] The invention relates to the field of degaussers, in particular to an intelligent nano powder degausser and a degaussing method. Background technique [0002] Most of the degaussers in the prior art use low frequency and high current to generate an alternating magnetic field that decreases gradually according to the law of the index, so as to achieve the purpose of degaussing. When the size of the object to be degaussed is relatively large, the degausser in the prior art can achieve a better degaussing effect. However, in actual use, it is often necessary to demagnetize nano-scale substances with extremely small sizes. For example, when doing transmission electron microscopy, it is necessary to oxidize nano-scale metals and their oxidized powders, otherwise the problem of powder agglomeration will easily occur. However, when the degausser in the prior art demagnetizes the powder with a diameter below 100nm, because the size of the degaussing magnetic...

AI Technical Summary

Problems solved by technology

However, when the degausser in the prior art demagnetizes the powder with a diameter below 100nm, because the size of the degaussing magnetic field is not easy to control, when the degaussing magnetic field is too large, the powder will have a thermal effect during degaussing and sinter into a lump

That is, the degausser in the prior art will destroy the self-morphology of the degaussed object when degaussing the nano powder

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