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Layered magnetoelectric composite material and preparation method thereof

A magnetoelectric composite material and layered technology, applied in the field of material science, can solve the problems of reducing the performance of composite materials and high temperature, and achieve the effect of improving performance, good ferromagnetism and good ferroelectricity

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

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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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  • Layered magnetoelectric composite material and preparation method thereof
  • Layered magnetoelectric composite material and preparation method thereof
  • Layered magnetoelectric composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The chemical formula of layered magnetoelectric composite material is: xBiY 2 Fe 5 o 12 / (1-x)0.65BaTiO 3 -0.35 (Na 0.5 Bi 0.5 )TiO 3 , where x is BiY 2 Fe 5 o 12 The mass percentage of , and x = 0.1.

[0047] The preparation method of the above-mentioned layered magnetoelectric composite material comprises the following steps:

[0048] (1) According to the chemical formula 0.65BaTiO 3 -0.35 (Na 0.5 Bi 0.5 )TiO 3 will analyze pure BaCO 3 、TiO 2 、 Bi 2 o 3 、Na 2 CO 3 After preparation, it was mixed evenly by wet ball milling for 4 hours, then dried, sieved, briquetting, and then pre-fired at 880°C for 6 hours to obtain a block product, and then the block product was crushed and passed through a 120-mesh sieve to obtain 0.65BaTiO 3 -0.35 (Na 0.5 Bi 0.5 )TiO 3 Powder;

[0049] (2) According to the chemical formula BiY 2 Fe 5 o 12 Analytical pure Bi 2 o 3 , Y 2 o 3 , Fe 2 o 3 After preparation, it was mixed evenly by wet ball milling for 6 hour...

Embodiment 2

[0056] The chemical formula of layered magnetoelectric composite material is: xBiY 2 Fe 5 o 12 / (1-x)0.65BaTiO 3 -0.35 (Na 0.5 Bi 0.5 )TiO 3 , where x is BiY 2 Fe 5 o 12 The mass percentage of , and x = 0.2.

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

[0058] (1) According to the chemical formula 0.65BaTiO 3 -0.35 (Na 0.5 Bi 0.5 )TiO 3 will analyze pure BaCO 3 、TiO 2 、 Bi 2 o 3 、Na 2 CO 3 After preparation, it was mixed evenly by wet ball milling for 5 hours, then dried, sieved, briquetting, and then pre-fired at 920°C for 4 hours to obtain a block product, and then the block product was crushed and passed through a 120-mesh sieve to obtain 0.65BaTiO 3 -0.35 (Na 0.5 Bi 0.5 )TiO 3 Powder;

[0059] (2) According to the chemical formula BiY 2 Fe 5 o 12 Analytical pure Bi 2 o 3 , Y 2 o 3 , Fe 2 o 3 After preparation, it was mixed evenly by wet ball milling for 5 ho...

Embodiment 3

[0066] The chemical formula of layered magnetoelectric composite material is: xBiY 2 Fe 5 o 12 / (1-x)0.65BaTiO 3 -0.35 (Na 0.5 Bi 0.5 )TiO 3 , where x is BiY 2 Fe 5 o 12 The mass percentage of x=0.3.

[0067] The preparation method of the above-mentioned layered magnetoelectric composite material comprises the following steps:

[0068] (1) According to the chemical formula 0.65BaTiO 3 -0.35 (Na 0.5 Bi 0.5 )TiO 3 will analyze pure BaCO 3 、TiO 2 、 Bi 2 o 3 、Na 2 CO 3 After preparation, it was mixed evenly by wet ball milling for 6 hours, then dried, sieved, briquetting, and then pre-fired at 900°C for 5 hours to obtain a block product, and then the block product was crushed and passed through a 120-mesh sieve to obtain 0.65BaTiO 3 -0.35 (Na 0.5 Bi 0.5 )TiO 3 Powder;

[0069] (2) According to the chemical formula BiY 2 Fe 5 o 12 Analytical pure Bi 2 o 3 , Y 2 o 3 , Fe 2 o 3 After preparation, it was mixed evenly by wet ball milling for 4 hours, the...

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Abstract

The invention discloses a layered magnetoelectric composite material and a preparation method thereof. The preparation method comprises the following steps: granulating 0.65BaTiO3-0.35(Na0.5Bi0.5)TiO3 powder and BiY2Fe5O12 powder respectively, then carrying out compression moulding in a mould in a manner of 2-2 composite barrier layer superposition arrangement, then removing a PVA adhesive, and sintering at 1100-1150 DEG C to obtain the layered magnetoelectric composite material. According to the layered magnetoelectric composite material and the preparation method thereof disclosed by the invention, because the 0.65BaTiO3-0.35(Na0.5Bi0.5)TiO3 powder and the BiY2Fe5O12 powder are moulded in the manner of 2-2 composite barrier layer superposition arrangement to co-sinter a ferroelectric phase and a ferromagnetic phase in a layered composite manner, inter-reaction between the two phases can be effectively suppressed, thus keeping the respective characteristics, and enabling the layered magnetoelectric composite material to be good in both ferroelectricity and ferromagnetism.

Description

technical field [0001] The invention belongs to the field of material science and relates to a layered magnetoelectric composite material and a preparation method thereof. Background technique [0002] With the continuous development of information technology and the miniaturization and multifunctionalization of devices, people's research interest in multifunctional materials with both current collection and magnetism is constantly increasing. 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, and ferroelasticity), but also can produce some new functions through the coupling and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/40C04B35/622H10N30/853
Inventor 杨海波张戈林营朱建锋王芬
Owner SHAANXI UNIV OF SCI & TECH
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