Layered magnetoelectric composite material with high Curie temperature and high magnetoelectric coupling performance and preparation method of layered magnetoelectric composite material

A magnetoelectric composite material and electric coupling technology, applied in the field of material science, can solve the problems of low magnetoelectric voltage coefficient and uneven dispersion

Inactive Publication Date: 2016-11-23
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the uneven dispersion of the ferroelectric phase (ferromagnetic phase) in the ferromagnetic (ferroelectric) matrix, the magnetoelectric voltage coefficient of this type of structure is low

Method used

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  • Layered magnetoelectric composite material with high Curie temperature and high magnetoelectric coupling performance and preparation method of layered magnetoelectric composite material
  • Layered magnetoelectric composite material with high Curie temperature and high magnetoelectric coupling performance and preparation method of layered magnetoelectric composite material
  • Layered magnetoelectric composite material with high Curie temperature and high magnetoelectric coupling performance and preparation method of layered magnetoelectric composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The chemical formula of layered magnetoelectric composites is: (1-x)Li 0.058 (Na 0.535 K 0.48 ) 0.942 NbO 3 / xCo 0.6 Zn 0.4 Fe 1.7 mn 0.3 o 4 , where x is Co 0.6 Zn 0.4 Fe 1.7 mn 0.3 o 4 The mass percentage of , and x = 0.1.

[0051] The preparation method of the above-mentioned layered magnetoelectric composite material comprises the following steps:

[0052] (1) According to the chemical formula Li 0.058 (Na 0.535 K 0.48 ) 0.942 NbO 3 Analytical pure K 2 CO 3 、Na 2 CO 3 , Li 2 CO 3 and Nb 2 o 5 After the preparation, it was mixed uniformly by ball milling for 20 hours, then dried, sieved, and briquetted, and then pre-fired at 840°C for 3 hours to obtain a block product, and then the block product was crushed and passed through a 120-mesh sieve to obtain Li 0.058 (Na 0.535 K 0.48 ) 0.942 NbO 3 Powder;

[0053] (2) According to the chemical formula Co 0.6 Zn0.4 Fe 1.7 mn 0.3 o 4 will analyze pure Co 3 o 4 , ZnO, MnO 2 and Fe 2 o ...

Embodiment 2

[0065] The chemical formula of layered magnetoelectric composites is: (1-x)Li 0.058 (Na 0.535 K 0.48 ) 0.942 NbO 3 / xCo 0.6 Zn 0.4 Fe 1.7 mn 0.3 o 4 , where x is Co 0.6 Zn 0.4 Fe 1.7 mn 0.3 o 4 The mass percentage of , and x = 0.2.

[0066] The preparation method of the above-mentioned layered magnetoelectric composite material comprises the following steps:

[0067] (1) According to the chemical formula Li 0.058 (Na 0.535 K 0.48 ) 0.942 NbO 3 Analytical pure K 2 CO 3 、Na 2 CO 3 , Li 2 CO 3 and Nb 2 o 5 After the preparation, it was mixed evenly by ball milling for 21 hours, then dried, sieved, briquetting, and then pre-fired at 845°C for 3.5 hours to obtain a block product, and then the block product was crushed and passed through a 120-mesh sieve to obtain Li 0.058 (Na 0.535 K 0.48 ) 0.942 NbO 3 Powder;

[0068] (2) According to the chemical formula Co 0.6 Zn 0.4 Fe 1.7 mn 0.3 o 4 will analyze pure Co 3 o 4 , ZnO, MnO 2 and Fe 2 o 3 ...

Embodiment 3

[0080] The chemical formula of layered magnetoelectric composites is: (1-x)Li 0.058 (Na 0.535 K 0.48 ) 0.942 NbO 3 / xCo 0.6 Zn 0.4 Fe 1.7 mn 0.3 o 4 , where x is Co 0.6 Zn 0.4 Fe 1.7 mn 0.3 o 4 The mass percentage of x=0.3.

[0081] The preparation method of the above-mentioned layered magnetoelectric composite material comprises the following steps:

[0082] (1) According to the chemical formula Li 0.058 (Na 0.535 K 0.48 ) 0.942 NbO 3 Analytical pure K 2 CO 3 、Na 2 CO 3 , Li 2 CO 3 and Nb 2 o 5 After preparation, it was mixed uniformly by ball milling for 22 hours, then dried, sieved, briquetting, and then pre-fired at 850°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 Li 0.058 (Na 0.535 K 0.48 ) 0.942 NbO 3 Powder;

[0083] (2) According to the chemical formula Co 0.6 Zn 0.4 Fe 1.7 mn 0.3 o 4 will analyze pure Co 3 o 4 , ZnO, MnO 2 and Fe 2 o 3 After the p...

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Abstract

A layered magnetoelectric composite material with high Curie temperature and high magnetoelectric coupling performance and its preparation method, comprising Li 0.058 (Na 0.535 K 0.48 ) 0.942 NbO 3 Powder, Co 0.6 Zn 0.4 Fe 1.7 mn 0.3 o 4 After the powder is granulated, it is pressed and formed in a mold according to the stacked arrangement of 2-2 composite barrier layers, and then the PVA binder is discharged, and sintered at 1020-1040°C to obtain a layered magnetoelectric composite material. In the present invention, since Li 0.058 (Na 0.535 K 0.48 ) 0.942 NbO 3 Powder, Co 0.6 Zn 0.4 Fe 1.7 mn 0.3 o 4 The powder is superimposed and arranged in a 2-2 composite barrier layer, and the ferroelectric phase and the ferromagnetic phase are co-fired together in a layered composite manner, so that it has a higher Curie temperature, better ferroelectric properties and magnetic properties. electric effect.

Description

technical field [0001] The invention belongs to the field of material science, and relates to a layered magnetoelectric composite material with high Curie temperature and high magnetoelectric coupling performance and a preparation method thereof. Background technique [0002] With the rapid development of mobile communication and computer technology, various electronic devices have become more highly integrated, multi-functional, miniaturized and responsive. Since the miniaturization and miniaturization of electronic equipment is an inevitable trend, there is an urgent need for a material to have two or more properties at the same time, so as to reduce the consumption of limited space on the circuit board and further realize miniaturization. Based on this, magnetoelectric materials with both ferroelectricity and ferromagnetism came into being. [0003] Magnetoelectric composite materials are composed of two single-phase materials (ferroelectric phase and ferromagnetic phase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622
CPCC04B35/495C04B35/622C04B2235/3201C04B2235/3203C04B2235/3267C04B2235/3274C04B2235/3277C04B2235/3284C04B2235/785C04B2235/96
Inventor 杨海波张锦涛林营朱建锋王芬
Owner SHAANXI UNIV OF SCI & TECH
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