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Polymer-based composite medium with ferromagnetic anisotropy and preparation method thereof

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, restrictions, etc., and achieve the effect of reducing leakage current

Active Publication Date: 2020-11-27
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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  • Polymer-based composite medium with ferromagnetic anisotropy and preparation method thereof
  • Polymer-based composite medium with ferromagnetic anisotropy and preparation method thereof
  • Polymer-based composite medium with ferromagnetic anisotropy and preparation method thereof

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specific Embodiment approach 1

[0049] A method for preparing a polymer-based composite medium with ferromagnetic anisotropy, comprising the steps of:

[0050] Step a, preparation of CoFe 2 o 4 Nanofibers;

[0051] Step b, preparation of core-shell structure CoFe 2 o 4 @BaTiO 3 Nanofibers;

[0052] Step c, preparation of CoFe 2 o 4 @BaTiO 3 -P(VDF-TrFE) based composite medium;

[0053] Step d, preparing a polymer-based composite medium with ferromagnetic anisotropy.

[0054] 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:

[0055] 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;

[0056] Step a2, adding cobalt pinate hexahydrate and ferric nitrate nonahydrate weighed in step a1 into the ethanol solution, stirring evenly...

specific Embodiment approach 2

[0081] A method for preparing a polymer-based composite medium with ferromagnetic anisotropy, comprising the steps of:

[0082] Step a, preparation of CoFe 2 o 4 Nanofibers;

[0083] Step b, preparation of core-shell structure CoFe 2 o 4 @BaTiO 3 Nanofibers;

[0084] Step c, preparation of CoFe 2 o 4 @BaTiO 3 -P(VDF-TrFE) based composite medium;

[0085] Step d, preparing a polymer-based composite medium with ferromagnetic anisotropy.

[0086] 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:

[0087] 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;

[0088] Step a2, adding cobalt pinate hexahydrate and ferric nitrate nonahydrate weighed in step a1 into the ethanol solution, stirring evenly...

specific Embodiment approach 3

[0110] A method for preparing a polymer-based composite medium with ferromagnetic anisotropy, comprising the steps of:

[0111] Step a, preparation of CoFe 2 o 4 Nanofibers;

[0112] Step b, preparation of core-shell structure CoFe 2 o 4 @BaTiO 3 Nanofibers;

[0113] Step c, preparation of CoFe 2 o 4 @BaTiO 3 -P(VDF-TrFE) based composite medium;

[0114] Step d, preparing a polymer-based composite medium with ferromagnetic anisotropy.

[0115] 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:

[0116] 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;

[0117] 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

The invention discloses a polymer-based composite medium with ferromagnetic anisotropy and a preparation method thereof, and belongs to the technical field of preparation of multiferroic composite media. The invention aims to solve the technical problems that the preparation process of the material structure is complex and the growth condition is harsh and difficult to adjust and control. The preparation method comprises the following steps of: firstly, preparing an inorganic fiber filling phase with a large length-diameter ratio by adopting a sol-gel method and an electrostatic spinning technology; then coating the inorganic fiber filling phase with barium titanate by adopting a hydrothermal synthesis method; and compounding the inorganic fiber filling phas with P(VDF-TrFE), and carryingout hot-pressing treatment so as to obtain the compact high-orientation nanofiber polyvinylidene fluoride flexible multiferroic composite medium with a one-dimensional core-shell structure. Magnetic fields in different directions are applied to the surface of the composite medium, obvious magnetic anisotropy of the composite medium is observed, and the composite medium has higher saturation magnetization intensity and residual magnetization intensity in the fiber direction compared with the direction perpendicular to the fiber direction in the surface. Due to the property, the composite mediumhas a 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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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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