Sandwich structure giant magneto-impedance effect composite material and preparation method
A technology of giant magneto-impedance and composite materials, applied in the field of magnetic sensitive components, can solve the problems such as the inability of the giant magneto-impedance value to be significantly improved and the magnetic flux path to be unable to be well closed, to enhance the GMI effect, suitable for mass production, The effect of increasing sensitivity
Active Publication Date: 2021-02-09
EAST CHINA NORMAL UNIVERSITY
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The invention discloses a sandwich structure giant magneto-impedance effect composite material and a preparation method. According to the preparation method, a reduced graphene oxide (rGO) inner layeris synthesized on a nanocrystalline Fe73.5. 5Cu1Nb3Si13B9.5 strip of a sensitive element of a giant magneto-impedance sensor through one-step chemical plating, a FeCo outer layer is obtained througha magnetron sputtering method, and the giant magneto-impedance (GMI) effect composite of the FeCo/rGO/FINEMET/rGO/FeCo sandwich structure is obtained. The invention has the beneficial effects that onone hand, the reduced graphene oxide layer is used as a high-conductivity layer, a channel beneficial to high-frequency current flowing is provided, and the skin effect is greatly reduced; on the other hand, the FeCo layer increases the magnetic conductivity, and a closed magnetic circuit is provided. Finally, the giant magneto-impedance (GMI) effect composite material with the FeCo/rGO/FINEMET/rGO/FeCo sandwich structure obtains a remarkably enhanced GMI effect, the sensitivity of the GMI sensor is also improved, the process is simple, and the giant magneto-impedance composite material is suitable for mass production.
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Property | Measurement | Unit |
Concentration | 10.0 ~ 100.0 | mg/l |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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