Bismuth ferrite/polyvinylidene fluoride-trifluoroethylene multilayer composite film and preparation method thereof

A polyvinylidene fluoride and trifluoroethylene technology, applied in semiconductor/solid-state device manufacturing, coating, electric solid-state devices, etc., can solve the problems of high remanent polarization, high coercive field, large leakage current, etc. Achieve the effect of solving large leakage current, simple preparation method and easy operation
CN111662469AActive Publication Date: 2020-09-15HUBEI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUBEI UNIV
Publication Date
2020-09-15

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Abstract

The invention belongs to the technical field of multiferroic films, and concretely relates to a bismuth ferrite / polyvinylidene fluoride-trifluoroethylene multilayer composite film. The multilayer composite film comprises a PVDF-TrFE thin film and at least one layer of BFO / PVDF-TrFE composite film, and the PVDF-TrFE film is attached to the uppermost BFO / PVDF-TrFE composite film. A preparation method of the multilayer composite film comprises the following steps: dissolving PVDF-TrFE powder to obtain a solution A, and adding BFO nanoscale powder into the solution A to obtain a mixed solution B;taking FTO conductive glass as a substrate, spin-coating the FTO conductive glass with the mixed solution B to prepare a BFO / PVDF-TrFE composite film, drying, and spin-coating the BFO / PVDF-TrFE composite film with the solution A to prepare a PVDF-TrFE film; and then annealing the wet film to obtain a cobalt ferrite / polyvinylidene fluoride-trifluoroethylene multilayer composite film, and finally plating a platinum point electrode on the cobalt ferrite / polyvinylidene fluoride-trifluoroethylene multilayer composite film. The bismuth ferrite / polyvinylidene fluoride-trifluoroethylene multilayer composite film disclosed by the invention not only has low leakage current, but also has relatively high remnant polarization intensity, and is low in process equipment cost, simple in process and high in controllability.
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Description

technical field

[0001] The invention relates to a multiferroic composite film and a preparation method thereof, in particular to a bismuth ferrite / polyvinylidene fluoride-trifluoroethylene multilayer composite film and a preparation method thereof, belonging to the technical field of multiferroic films. Background technique

[0002] In recent years, multiferroic composites formed of ceramics and polymers have attracted extensive attention and research due to their great application potential in multiferroic devices, such as sensors, actuators, and energy harvesters. Combination of polymers and ceramic particles can use traditional technology to prepare body materials and thin films, which has good process stability and is easy to implement. For example, the composite of traditional lead zirconate titanate, lead titanate or ferromagnetic materials such as cobalt ferrite and copolymer PVDF-TrFE can easily realize the dispersion of ceramic powder in the copolymer to form variou...

Claims

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