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Low-frequency multiferroic particle magnetic-electric composite material and preparation method thereof

A magnetoelectric composite material and composite material technology are applied in the field of low-frequency multiferroic nanoparticle magnetoelectric composite materials and their preparation, which can solve the problems of easy shedding and aging, environmental pollution, and difficulty in long-term preservation and use, and achieve practicality. The effect of strong, low bias magnetic field and large magnetoelectric coupling

Inactive Publication Date: 2010-12-15
SHANGHAI UNIV
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Problems solved by technology

However, layered composite materials often use resin glue to bond the ferroelectric phase and ferromagnetic phase together in the compounding process, so it is easy to fall off and age, and it is not easy to store and use for a long time, which is often limited in actual use.
In addition, the piezoelectric phase materials used in most composite materials contain lead, which will bring great pollution to the environment

Method used

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  • Low-frequency multiferroic particle magnetic-electric composite material and preparation method thereof
  • Low-frequency multiferroic particle magnetic-electric composite material and preparation method thereof
  • Low-frequency multiferroic particle magnetic-electric composite material and preparation method thereof

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Embodiment Construction

[0018] The following description is a specific description of the present invention, and should not be regarded as a limitation of the present invention.

[0019] The molecular formula of the multiphase nanoparticle composite material with magnetoelectric coupling effect of the present invention is xCoFe 2 o 4 -(1-x)[0.948(K 0.5 Na 0.5 )NbO 3 -0.052LiSbO 3 ], where x=0.3 mol. The main phase of the composite nanoparticle mixed multiferroic material is 0.948 (K 0.5 Na 0.5 )NbO 3 -0.052LiSbO 3 , the doped phase is CoFe 2 o 4 . The multiphase nanoparticle mixed multiferroic material is made of raw materials of metal elements, and the raw materials are oxides and inorganic salts containing K, Na, Nb, Li, Sb, Co and Fe metal elements. The production process of the multiphase nanoparticle mixed multiferroic material includes selecting components, preparing the main phase component and the mixed component respectively, and finally mixing, grinding and firing the main phase...

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Abstract

The invention relates to a lead-free nontoxic low-frequency multiferroic nanoparticle magnetic-electric composite material and a preparation method thereof. The low-frequency multiferroic nanoparticle magnetic-electric composite material has magnetic-electric coupling effect. The low-frequency multiferroic nanoparticle magnetic-electric composite material has a chemical formula of xCoFe2O4-(1-x)[0.948(K0.5Na0.5)NbO3-0.052LiSbO3], wherein the optimal mol doping quantity x is 0.2-0.4mol. The parent phase of the composite particle material is 0.948(K0.5Na0.5)NbO3-0.052LiSbO3 with ferroelectricity, which is prepared by using a traditional solid phase method, and the doping phase thereof is a nanoparticle CoFe2O4 with ferroelectricity, which is prepared by using a sol-gel method. The multiferroic particle magnetic-electric composite material has the characteristics of better magnetic-electric coupling property, higher hardness, durability, and the like compared with the similar lead-free particle composite materials; and the preparation method is simple, low in the requirement on production equipment, and easy to massive production. The multiferroic particle magnetic-electric composite material has better ferroelectricity and stronger ferromagnetism and magnetic-electric coupling property, obtains wide application prospect in the fields of a sensor, a capacitor, a magnetic-electric storage, and the like, and achieves important function on the aspect of basic physics research.

Description

technical field [0001] The invention relates to a lead-free and non-toxic low-frequency multiferroic nano particle magnetoelectric composite material with magnetoelectric coupling effect and a preparation method thereof. Background technique [0002] In modern life and production with device miniaturization and diversified demands, there is an increasingly urgent need for multifunctional materials, and multiferroic materials are a typical representative of them. Multiferroic materials have multiple magnetisms such as ferroelectricity and ferromagnetism at the same time, and due to the coupling effect between different ferrotypes, they have new properties such as magnetoelectric effect, which greatly expands the application range of ferromagnetic materials. The magnetoelectric effect refers to the effect that the application of a magnetic field causes a change in electrical polarization, or the effect that an application of an electric field causes a change in magnetic polari...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622
Inventor 周云姚雪灿李同伟张金仓
Owner SHANGHAI UNIV
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