A polymer-based composite medium with ferromagnetic anisotropy and its preparation method

An anisotropic, composite medium technology, applied in the field of preparation of multiferroic composite medium, can solve problems such as difficult adjustment and control, harsh growth conditions, complex preparation process, etc., and achieve the effect of reducing leakage current

Active Publication Date: 2022-02-08
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, due to the complicated preparation process of this structure and the harsh growth conditions, it is difficult to adjust and control, which is greatly restricted in practical application.

Method used

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  • A polymer-based composite medium with ferromagnetic anisotropy and its preparation method
  • A polymer-based composite medium with ferromagnetic anisotropy and its preparation method
  • A polymer-based composite medium with ferromagnetic anisotropy and its preparation method

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specific Embodiment approach 1

[0048] A method for preparing a polymer-based composite medium with ferromagnetic anisotropy, comprising the steps of:

[0049] Step a, preparation of CoFe 2 o 4 Nanofibers;

[0050] Step b, preparation of core-shell structure CoFe 2 o 4 @BaTiO 3 Nanofibers;

[0051] Step c, preparation of CoFe 2 o 4 @BaTiO 3 -P(VDF-TrFE) based composite medium;

[0052] Step d, preparing a polymer-based composite medium with ferromagnetic anisotropy.

[0053] A method for preparing a polymer-based composite medium with ferromagnetic anisotropy described in this embodiment, in step a, CoFe 2 o 4 The preparation method of nanofiber comprises the steps:

[0054] Step a1, weighing cobalt hexahydrate, ferric nitrate nonahydrate, and citric acid of a certain quality respectively according to the ratio of the amount of substances, and set aside;

[0055] Step a2, adding cobalt pinate hexahydrate and ferric nitrate nonahydrate weighed in step a1 into the ethanol solution, stirring evenly...

specific Embodiment approach 2

[0079] A method for preparing a polymer-based composite medium with ferromagnetic anisotropy, comprising the steps of:

[0080] Step a, preparation of CoFe 2 o 4 Nanofibers;

[0081] Step b, preparation of core-shell structure CoFe 2 o 4 @BaTiO 3 Nanofibers;

[0082] Step c, preparation of CoFe 2 o 4 @BaTiO 3 -P(VDF-TrFE) based composite medium;

[0083] Step d, preparing a polymer-based composite medium with ferromagnetic anisotropy.

[0084] A method for preparing a polymer-based composite medium with ferromagnetic anisotropy described in this embodiment, in step a, CoFe 2 o 4 The preparation method of nanofiber comprises the steps:

[0085] Step a1, weighing cobalt hexahydrate, ferric nitrate nonahydrate, and citric acid of a certain quality respectively according to the ratio of the amount of substances, and set aside;

[0086] Step a2, adding cobalt pinate hexahydrate and ferric nitrate nonahydrate weighed in step a1 into the ethanol solution, stirring evenly...

specific Embodiment approach 3

[0107] A method for preparing a polymer-based composite medium with ferromagnetic anisotropy, comprising the steps of:

[0108] Step a, preparation of CoFe 2 o 4 Nanofibers;

[0109] Step b, preparation of core-shell structure CoFe 2 o 4 @BaTiO 3 Nanofibers;

[0110] Step c, preparation of CoFe 2 o 4 @BaTiO 3 -P(VDF-TrFE) based composite medium;

[0111] Step d, preparing a polymer-based composite medium with ferromagnetic anisotropy.

[0112] CoFe in step a of the preparation method of a polymer-based composite medium with ferromagnetic anisotropy described in this embodiment 2 o 4 The preparation method of nanofiber comprises the steps:

[0113] Step a1, weighing cobalt hexahydrate, ferric nitrate nonahydrate, and citric acid of a certain quality respectively according to the ratio of the amount of substances, and set aside;

[0114] Step a2, adding cobalt pinate hexahydrate and ferric nitrate nonahydrate weighed in step a1 into the ethanol solution, stirring ev...

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Abstract

A polymer-based composite medium with ferromagnetic anisotropy and a preparation method thereof belong to the technical field of preparation of multiferroic composite media. The technical problem to be solved by the present invention is that the preparation process of the material structure is complex and the growth conditions are harsh and difficult to adjust and control. The present invention first adopts sol-gel method and electrospinning technology to prepare inorganic fiber filling phase with large aspect ratio, then adopts hydrothermal synthesis method to coat it with barium titanate, and then compound it with P(VDF-TrFE) And carry out hot pressing treatment to obtain the one-dimensional core-shell structure nanofiber polyvinylidene fluoride flexible multiferroic composite medium with dense and high orientation. The present invention also observes that the composite medium has obvious magnetic anisotropy by applying magnetic fields in different directions in the plane of the composite medium. Compared with the direction perpendicular to the fiber, the direction along the fiber has a larger saturation magnetization and residual magnetization. This property makes composite media have more unique application potential.

Description

technical field [0001] The invention belongs to the technical field of preparation of multiferroic composite media; in particular, it relates to a polymer-based composite media with ferromagnetic anisotropy and a preparation method thereof. Background technique [0002] With the advent of the era of big data, the amount of continuously generated information has exploded, posing severe challenges to the storage capacity (capacity, speed) of data. Magnetic storage is the most important storage technology at present. Due to the principle of "magnetic writing and magnetic reading" and the limitation of microelectronic technology, its storage speed has approached the limit. How to improve the access speed is an important problem currently facing. Therefore, the research and development of new "reading and writing" technology has become an important trend of research at home and abroad. Among many reading and writing technologies, the magnetoelectric coupling effect of multiferroi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08K9/10C08K7/08D01F9/08D01F11/00H01F1/42
CPCC08K9/10C08K7/08D01F9/08D01F11/00H01F1/42C08K2201/011C08L27/16
Inventor 冯宇张煜迟庆国梁剑
Owner HARBIN UNIV OF SCI & TECH
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