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A CoFe 2 o 4 /BaTiO 3 Layered magnetoelectric composite material and its preparation method

A magnetoelectric composite material and technology of the composite material are applied in the field of CoFe2O4/BaTiO3 layered magnetoelectric composite material and its preparation, which can solve the problems of high temperature and reduce the performance of the composite material, and achieve good compactness, good interface coupling, suppression of effect of interaction

Active Publication Date: 2016-08-24
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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  • A CoFe <sub>2</sub> o <sub>4</sub> /BaTiO <sub>3</sub> Layered magnetoelectric composite material and its preparation method
  • A CoFe <sub>2</sub> o <sub>4</sub> /BaTiO <sub>3</sub> Layered magnetoelectric composite material and its preparation method
  • A CoFe <sub>2</sub> o <sub>4</sub> /BaTiO <sub>3</sub> Layered magnetoelectric composite material and its preparation method

Examples

Experimental program
Comparison scheme
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-fire 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 to 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

A CoFe2O4 / BaTiO3 layered magnetoelectric composite material and its preparation method. BaTiO3 powder and CoFe2O4 powder are sintered at 1000-1050°C in a 2-2 composite barrier layer stacking arrangement to prepare CoFe2O4 / BaTiO3 layered magnetoelectric composite material. Composite materials, due to the 2-2 composite barrier layer stacking arrangement, can effectively suppress the mutual reaction between the two phases and maintain their respective characteristics, so that the prepared composite materials have both good ferroelectricity and Better ferromagnetism. The electrical constant reaches 1900~4500, and the dielectric loss is 0.19~1.50. The saturation polarization intensity Ps is 14.8~18.7μC / cm2, 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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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/187C04B35/468C04B35/622H10N30/853
Inventor 杨海波张戈林营朱建锋王芬
Owner SHAANXI UNIV OF SCI & TECH
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