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: 2015-10-28
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 studyin

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  • Multiferroic liquid and preparation method thereof
  • Multiferroic liquid and preparation method thereof
  • 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, for solving the defects that a solid-state multiferroic material is large in coercive force, cannot be structurally changed once being formed, is low in magneto-electric coupling effect and is easily broken down by voltages. The multiferroic liquid is internally provided with a magnetic material, the outer surface of the magnetic material is wrapped by a ferroelectric material, nanometer particles with magneto-electric core shell structures are uniformly dispersed in a mixed liquid of a base solution and a surfactant, and a stable suspending liquid is formed in such a way. The multiferroic liquid has ferroelectricity and magnetism, also has fluidity and is quite small in coercive force. The length and the thickness of a nanometer chain composed of the nanometer particles in the multiferroic liquid can be adjsuted by applying different electric fields or magnetic fields to the multiferroic liquid according to needs, and accordingly, the electrical property, the magnetic property, the hydrodynamic property, the optical property and the acoustic property of the multiferroic liquid are adjusted. The invention brings forward the concept of the multiferroic liquid for the first time ever, and also provides the preparation method, expanding a new research direction for research on a 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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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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