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CoFe2O4/BaTiO3 layered magnetoelectric composite material and preparation method thereof

A magnetoelectric composite material and composite material technology, applied in the field of CoFe2O4/BaTiO3 layered magnetoelectric composite material and its preparation, can solve the problems of high temperature and lower composite material performance, and achieve good compactness, good interface coupling, and preparation The effect of simple method

Active Publication Date: 2015-04-29
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature of this method is too high, it is easy to produce some unpredictable phases, and reduce the performance of the composite material

Method used

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  • CoFe2O4/BaTiO3 layered magnetoelectric composite material and preparation method thereof
  • CoFe2O4/BaTiO3 layered magnetoelectric composite material and preparation method thereof
  • CoFe2O4/BaTiO3 layered magnetoelectric composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] a CoFe 2 o 4 / BaTiO 3 Layered magnetoelectric composite material, the chemical expression of the composite material is xCoFe 2 o 4 / (1-x)BaTiO 3 , where x is CoFe 2 o 4 The mass percentage, and 11.1%.

[0044] The preparation method of above-mentioned composite material, comprises the following steps:

[0045] (1) According to the general chemical formula BaTiO 3 will analyze pure BaCO 3 and TiO 2 Mix and wet ball mill for 4 hours, dry, sieve, briquette, and then pre-fire at 880°C for 6 hours to obtain a block product, then crush the block product and pass through a 120-mesh sieve to obtain BaTiO 3 Powder;

[0046] (2) According to the general chemical formula CoFe 2 o 4 will analyze pure Co 3 o 4 , Fe 2 o 3 Mix and wet ball mill for 6 hours, dry, sieve, briquette, pre-fire at 1020°C for 4 hours to obtain a block product, then crush the block product and pass through a 120-mesh sieve to obtain CoFe 2 o 4 Powder;

[0047] (3) to BaTiO 3 Add Li to the...

Embodiment 2

[0056] a CoFe 2 o 4 / BaTiO 3 Layered magnetoelectric composite material, the chemical expression of the composite material is xCoFe 2 o 4 / (1-x)BaTiO 3 , where x is CoFe 2 o 4 The mass percentage, and 22.2%.

[0057] The preparation method of above-mentioned composite material, comprises the following steps:

[0058] (1) According to the general chemical formula BaTiO 3 will analyze pure BaCO 3 and TiO 2 Mix and wet ball mill for 5 hours, then dry, sieve, briquette, and pre-fire at 920°C for 4 hours to obtain a block product, then crush the block product and pass through a 120-mesh sieve to obtain BaTiO 3 Powder;

[0059] (2) According to the general chemical formula CoFe 2 o 4 will analyze pure Co 3 o 4 , Fe 2 o 3 Mix and wet ball mill for 5 hours, dry, sieve, briquette, and pre-calcine at 1000°C for 6 hours to obtain a block product, then crush the block product and pass through a 120-mesh sieve to obtain CoFe 2 o 4 Powder;

[0060] (3) to BaTiO 3 Add Li t...

Embodiment 3

[0069] a CoFe 2 o 4 / BaTiO 3 Layered magnetoelectric composite material, the chemical expression of the composite material is xCoFe 2 o 4 / (1-x)BaTiO 3 , where x is CoFe 2 o 4 The mass percentage, and 33.3%.

[0070] The preparation method of above-mentioned composite material, comprises the following steps:

[0071] (1) According to the general chemical formula BaTiO 3 will analyze pure BaCO 3 and TiO 2 Mix and wet ball mill for 6 hours, dry, sieve, briquette, and pre-fire at 900°C for 5 hours to obtain a block product, then crush the block product and pass through a 120-mesh sieve to obtain BaTiO 3 Powder;

[0072] (2) According to the general chemical formula CoFe 2 o 4 will analyze pure Co 3 o 4 , Fe 2 o 3 Mix and wet ball mill for 4 hours, dry, sieve, briquette, and pre-fire at 1010°C for 5 hours to obtain a block product, then crush the block product and pass through a 120-mesh sieve to obtain CoFe 2 o 4 Powder;

[0073] (3) to BaTiO 3 Add Li to the ...

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Abstract

The invention discloses a CoFe2O4 / BaTiO3 layered magnetoelectric composite material and a preparation method thereof. The preparation method comprises the following steps: sintering BaTiO3 powder and CoFe2O4 powder at the temperature of 1000 to 1050 DEG C in a 2-2 composite base superposition arrangement mode, thereby obtaining the CoFe2O4 / BaTiO3 layered magnetoelectric composite material. With the adoption of the 2-2 composite base superposition arrangement mode, mutual reaction between two phases can be effectively inhibited so as to maintain the respective characteristics, so that the prepared composite material has high ferroelectricity and high ferromagnetic property. The electric constant reaches 1900-4500, and the dielectric loss is 0.19-1.50. The saturated polarization Ps is 14.8-18.7mu C / cm<2>, the coercive field Ec is 8.6-14.6kV / cm, and the saturation magnetization Ms is 3.4-20.9emu / g.

Description

technical field [0001] The invention belongs to the field of material science and relates to a CoFe 2 o 4 / BaTiO 3 Layered magnetoelectric composite material and its preparation method. Background technique [0002] In recent years, the rapid development of information, communication and Internet technology requires the transmission of high-speed data and high current density, and electronic circuits are increasingly developing in the direction of miniaturization and integration. , lightweight and multi-functional requirements. Therefore, the miniaturization and miniaturization of components including ferroelectric dielectric materials and magnetic materials is an inevitable trend, and the magnetoelectric composite materials that integrate ferroelectricity and ferromagnetism have the same volume but can be used on circuits Has more functions. [0003] Multiferroic materials not only possess a variety of single ferroic properties (such as ferroelectricity, ferromagnetism...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/622
Inventor 杨海波张戈林营朱建锋王芬
Owner SHAANXI UNIV OF SCI & TECH
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