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A kind of multiferroic liquid and preparation method thereof

A multiferroic, liquid technology, applied in magnetic liquids and other directions, can solve the problems of large coercive force, weak effect, insignificant changes, damage to multiferroic materials, etc., and achieve the effect of simple preparation

Active Publication Date: 2018-02-02
嘉兴鼎尚信息科技有限公司
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Problems solved by technology

Solid multiferroic materials have the following disadvantages: 1. The coercive force of solid multiferroic materials is relatively large. When using magnetic or electric fields to regulate magnetism or ferroelectricity, the required magnetic or electric fields are relatively large; 2. .When studying the magnetoelectric coupling effect, it is found that the effect is relatively weak and the change is not obvious; 3. The application of a large electric field is easy to damage the multiferroic material, resulting in material waste; 4. Once the multiferroic material is formed, it cannot be changed

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  • A kind of multiferroic liquid and preparation method thereof
  • A kind of multiferroic liquid and preparation method thereof
  • A kind of multiferroic liquid and preparation method thereof

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0035] A multiferroic liquid comprising multiferroic nanoparticles, a base fluid and a surfactant. The inside of the nanoparticle is a magnetic material that constitutes the core of the nanoparticle, and the magnetic material is preferably triiron tetroxide (Fe3O4), cobalt ferrite (CoFe 2 o 4 , abbreviated as CFO) or (γ-Fe 2 o 3(Those skilled in the art should know that other magnetic materials can also be used); the outer surface of the ferroelectric material is completely wrapped by the magnetic material to form the shell of the nanoparticle, and the ferroelectric material is preferably barium titanate (BTO) or zirconate titanate Lead (PZT) (one skilled in the art will know that other ferroelectric materials can also be used), multiferroic nanoparticles forming a magnetic-electric core-shell structure. The base liquid and the surfactant are unifor...

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Abstract

The invention discloses a multiferroic liquid and a preparation method thereof, and solves the problems that the solid multiferroic material has a large coercive force, cannot change its structure once formed, has a weak magnetoelectric coupling effect, and is easily broken down by voltage. The multiferroic liquid is a stable suspension formed by uniformly dispersing nano-particles of a magnetic-electric core-shell structure in which a magnetic material is inside and ferroelectric materials are wrapped on the outer surface of the magnetic material in a mixed liquid of a base liquid and a surfactant. The multiferroic liquid of the present invention not only has ferroelectricity and magnetism, but also has fluidity, and its coercive force is small. Different electric fields or magnetic fields can be applied to the multiferroic liquid to adjust the nanometer density in the multiferroic liquid. The length and thickness of the nanochains composed of particles can adjust the electrical, magnetic, hydrodynamic, optical and acoustic properties of the multiferroic liquid. The invention proposes the concept of multiferroic liquid for the first time, provides a preparation method, and opens up a new research direction for the research of multiferroic materials.

Description

technical field [0001] The invention belongs to the field of multiferroic materials, and in particular relates to a multiferroic liquid and a preparation method thereof. Background technique [0002] In 1994, Schmid in Switzerland clearly proposed the concept of multiferroic materials. Multiferroic materials (mutliferroic) refer to the basic properties of two or more types of iron in the same phase of the material. These basic properties of iron include iron Electricity (antiferroelectricity), ferromagnetism (antiferromagnetism, ferrimagnetism) and ferroelasticity. This kind of material has both spontaneous polarization order and spin order at a certain temperature. It is the magnetoelectric coupling effect caused by their simultaneous existence that makes multiferroics have some special physical properties and triggers several new , Significant physical phenomena, such as: generating electric polarization or inducing ferroelectric phase transition under the action of a mag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/44
Inventor 邓小玲高荣礼符春林蔡苇陈刚
Owner 嘉兴鼎尚信息科技有限公司
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