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Ba0.9Ca0.1Ti0.9Zr0.1O3/Co0.8Ni0.1Zn0.1Fe2O4 layered magnetoelectric composite and preparation method thereof

A magnetoelectric composite material, cofe2o4 technology, applied in the field of material science, can solve the problems of multiferroic materials without clear determinism of ferroelectricity and ferromagnetism source, various properties of materials cannot be stably controlled, etc., to achieve excellent ferromagnetic properties, The preparation method is simple and feasible, and the effect of inhibiting mutual reaction

Inactive Publication Date: 2017-02-22
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are some problems in the research: firstly, the various properties of the material cannot be stably manipulated, and there is no definite theory about the source of ferroelectricity and ferromagnetism of multiferroic materials with different structures; secondly, the response of materials under electric and magnetic fields The behavior needs to be further stabilized and improved; finally, the research on multiferroic materials in the field of resistive random storage is still in its infancy, and the related effects and mechanism explanations still need a large number of experiments to verify

Method used

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  • Ba0.9Ca0.1Ti0.9Zr0.1O3/Co0.8Ni0.1Zn0.1Fe2O4 layered magnetoelectric composite and preparation method thereof
  • Ba0.9Ca0.1Ti0.9Zr0.1O3/Co0.8Ni0.1Zn0.1Fe2O4 layered magnetoelectric composite and preparation method thereof
  • Ba0.9Ca0.1Ti0.9Zr0.1O3/Co0.8Ni0.1Zn0.1Fe2O4 layered magnetoelectric composite and preparation method thereof

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preparation example Construction

[0037] a Ba 0.9 Ca 0.1 Ti 0.9 Zr 0.1 o 3 / Co 0.8 Ni 0.1 Zn 0.1 Fe 2 o 4 A method for preparing a layered magnetoelectric composite material, comprising the following steps:

[0038] (1) According to the chemical formula Ba 0.9 Ca 0.1 Ti 0.9 Zr 0.1 o 3 will analyze pure BaCO 3 , CaCO 3 , ZrO 2 and TiO 2 After preparation, it is mixed uniformly by ball milling for 4-5 hours, then dried, sieved, and briquetted, and then pre-fired at 1150-1200 ° C for 2-3 hours to obtain a blocky solid. After the blocky solid is crushed, add sintering aid Li 2 CO 3 , ball milling again for 4 to 5 hours to obtain the product, and then pass the product through a 120-mesh sieve to obtain Ba 0.9 Ca 0.1 Ti 0.9 Zr 0.1 o 3 powder; among them, Li 2 CO 3 for Ba 0.9 Ca 0.1 Ti 0.9 Zr 0.1 o 3 0.5wt% of powder mass;

[0039] (2) According to the chemical formula Co 0.8 Ni 0.1 Zn 0.1 Fe 2 o 4 will analyze pure Co 2 o 3 , NiO, ZnO and Fe 2 o 3 After preparation, mix evenly...

Embodiment 1

[0047] The chemical formula of layered magnetoelectric composite material is: (1-x)Ba 0.9 Ca 0.1 Ti 0.9 Zr 0.1 o 3 / xCo 0.8 Ni 0.1 Zn 0.1 Fe 2 o 4 , where x is Co 0.8 Ni 0.1 Zn 0.1 Fe 2 o 4 The mole percentage of , and x = 0.1.

[0048] The preparation method of the above-mentioned layered magnetoelectric composite material comprises the following steps:

[0049] (1) According to the chemical formula Ba 0.9 Ca 0.1 Ti 0.9 Zr 0.1 o 3 will analyze pure BaCO 3 , CaCO 3 ,TiO 2 , ZrO 2 After the preparation, it was mixed evenly by ball milling for 4 hours, then dried, sieved, briquetting, and then pre-fired at 1200°C for 2 hours to obtain a block product. After crushing the block powder, add Li 2 CO 3 As a sintering aid, carry out secondary ball milling to obtain the product, and then pass the product through a 120-mesh sieve to obtain Ba 0.9 Ca 0.1 Ti 0.9 Zr 0.1 o 3 powder; among them, Li 2 CO 3 Added to Ba as a sintering aid 0.9 Ca 0.1 Ti 0.9 Zr ...

Embodiment 2

[0059] The chemical formula of layered magnetoelectric composite material is: (1-x)Ba 0.9 Ca 0.1 Ti 0.9 Zr 0.1 o 3 / xCo 0.8 Ni 0.1 Zn 0.1 Fe 2 o 4 , where x is Co 0.8 Ni 0.1 Zn 0.1 Fe 2 o 4 The mole percentage, and x = 0.2.

[0060] The preparation method of the above-mentioned layered magnetoelectric composite material comprises the following steps:

[0061] (1) According to the chemical formula Ba 0.9 Ca 0.1 Ti 0.9 Zr 0.1 o 3 will analyze pure BaCO 3 , CaCO 3 ,TiO 2 , ZrO 2 After the preparation, it was mixed evenly by ball milling for 5 hours, then dried, sieved, briquetting, and then pre-fired at 1150°C for 3 hours to obtain a block product. After crushing the block powder, add Li 2 CO 3 As a sintering aid, carry out secondary ball milling to obtain the product, and then pass the product through a 120-mesh sieve to obtain Ba 0.9 Ca 0.1 Ti 0.9 Zr 0.1 o 3 powder; among them, Li 2 CO 3 Added to Ba as a sintering aid 0.9 Ca 0.1 Ti 0.9 Zr 0.1 ...

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Abstract

The invention discloses a Ba0.9Ca0.1Ti0.9Zr0.1O3 / Co0.8Ni0.1Zn0.1Fe2O4 layered magnetoelectric composite and a preparation method thereof. After Ba0.9Ca0.1Ti0.9Zr0.1O3 powder and Co0.8Ni0.1Zn0.1Fe2O4 powder are granulated, the Ba0.9Ca0.1Ti0.9Zr0.1O3 powder and the Co0.8Ni0.1Zn0.1Fe2O4 powder are pressed and formed in a mold in a 2-2 compounding layered superimposing arrangement manner, then, a PVA adhesive is discharged, the mixture is sintered at the temperature of 1,100-1,150 DEG C, and the layered magnetoelectric composite is obtained. The Ba0.9Ca0.1Ti0.9Zr0.1O3 powder and the Co0.8Ni0.1Zn0.1Fe2O4 powder are prepared in a 2-2 compounding manner, two phases are sintered in the absence of organic adhesives, the layered composite with the two phases better combined is finally obtained, the reaction between the two phases and mutual dispersion of elements are effectively controlled, and the composite not only has ferroelectric properties and ferromagnetic properties, but also has high magnetoelectric coupling coefficients.

Description

technical field [0001] The invention belongs to the field of material science, in particular to a Ba 0.9 Ca 0.1 Ti 0.9 Zr 0.1 o 3 / Co 0.8 Ni 0.1 Zn 0.1 Fe 2 o 4 Layered magnetoelectric composite material and its preparation method. Background technique [0002] It can be seen from the development history of magnetoelectric materials that according to the different phase composition, magnetoelectric materials can be divided into two categories: single-phase magnetoelectric materials and magnetoelectric composite materials. Although the current BiFeO 3 The research boom of single-phase multiferroic magnetoelectric materials, represented by , has formed, but there are still many challenges in finding single-phase magnetoelectric materials with large magnetoelectric coupling effects above room temperature. [0003] Magnetoelectric composite materials use the product effect of the magnetostrictive effect of the ferromagnetic phase and the piezoelectric effect of the fe...

Claims

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Application Information

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IPC IPC(8): C04B35/49C04B35/34C04B35/622C04B35/64B32B9/00B32B5/16B32B9/04B32B5/30B32B7/08B32B33/00B32B37/10B32B37/06H01F1/01
CPCC04B35/49B32B5/16B32B5/30B32B7/08B32B33/00B32B37/06B32B37/10B32B2264/10B32B2264/12B32B2307/20B32B2307/204B32B2307/208C04B35/265C04B35/622C04B35/64C04B2235/3208C04B2235/3215C04B2235/3232C04B2235/3244C04B2235/3272C04B2235/3275C04B2235/3279C04B2235/3284C04B2235/602H01F1/01
Inventor 蒲永平王亚茹师裕
Owner SHAANXI UNIV OF SCI & TECH
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