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Multiferroic liquid and preparation method thereof

A multiferroic and liquid technology, applied in the direction of magnetic liquid, etc., can solve the problems of material waste, weak effect, no obvious change, multiferroic material damage, etc.

Inactive Publication Date: 2015-11-04
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 multiferroic material is easily damaged when the electric field is too large, resulting in material waste; 4. Once the multiferroic material is formed, its structure cannot be changed

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  • Multiferroic liquid and preparation method thereof

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with drawings and embodiments.

[0034]A multiferroic liquid, comprising magnetic nanoparticles, ferroelectric nanoparticles, a base liquid, and a surfactant, wherein the base liquid and the surfactant are uniformly mixed into a mixed liquid, the magnetic nanoparticles, The ferroelectric nanoparticles are uniformly dispersed in the mixed liquid to form a stable suspension. The ferroelectric nanoparticles are barium titanate (BTO), lead zirconate titanate (PZT) or ferric oxide (Fe 3 o 4 ), the magnetic nanoparticles are cobalt ferrite (CoFe 2 o 4 , abbreviated as CFO) or γ-Fe 2 o 3 (Those skilled in the art should know that other ferroelectric materials and magnetic materials can also be selected as required). The nanoparticles are ferroelectric (or magnetic) nanoparticles or nanowires. The particle size of the magnetic nanoparticles is≦20nm. The particle size of the ferroelectric nanoparticles ...

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Abstract

The invention discloses a multiferroic liquid and a preparation method of the multiferroic liquid. The multiferroic liquid of the invention is obtained via the following steps: uniformly mixing a base fluid and a surface active agent as a mixed liquid; then adding ferroelectric nano-particles and magnetic nano-particles in the mixed liquid, shaking the mixture and putting the mixture in a sealed container, and putting the container in a shaking table to shake for more than half an hour to make nano-particles evenly dispersed in the mixed liquid, thereby obtaining a stable suspension liquid, namely the multiferroic liquid. The multiferroic liquid of the invention not only has magnetism and ferroelectricity, but also has fluidity, and is very sensitive to a magnetic field and an electric field. Compared with solid ferroelectric material, the multiferroic liquid of the invention has smaller coercive force, and the particles are easy to rotate under the electric field or the magnetic field. The multiferroic liquid of the invention also has a magneto-optic effect and a refraction effect, which are not possessed by the solid multiferroic material. The invention presents the multiferroic liquid and the preparation method of the multiferroic liquid for the first time so as to develop a new direction for researching the multiferroic material.

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 Applications(China)
IPC IPC(8): H01F1/44
Inventor 蔡苇高荣礼符春林陈刚邓小玲
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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