Ba0.9Ca0.1Ti0.9Zr0.1O3/CoFe2O4 layered magnetoelectric composite and preparation method thereof

A technology of magnetoelectric composite materials and layered composite materials, applied in the field of material science, can solve problems such as interface separation, increase the difficulty of production technology, and differences, and achieve the effects of improved performance, simple and easy preparation method, and excellent ferroelectricity

Inactive Publication Date: 2017-03-08
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, in the layered composite materials that use inorganic materials as ferroelectric phase and ferromagnetic phase respectively, often due to the different sintering temperatures between the two phases, different shrinkage rates will occur when they are co-fired at a certain temperature, resulting in a gap between the interface of the product. Separation between them increases the difficulty of the production process

Method used

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  • Ba0.9Ca0.1Ti0.9Zr0.1O3/CoFe2O4 layered magnetoelectric composite and preparation method thereof
  • Ba0.9Ca0.1Ti0.9Zr0.1O3/CoFe2O4 layered magnetoelectric composite and preparation method thereof
  • Ba0.9Ca0.1Ti0.9Zr0.1O3/CoFe2O4 layered magnetoelectric composite and preparation method thereof

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preparation example Construction

[0041] a Ba 0.9 Ca 0.1 Ti 0.9 Zr 0.1 o 3 / CoFe 2 o 4 A method for preparing a layered magnetoelectric composite material, comprising the following steps:

[0042] (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 preparation, mix evenly by ball milling for 4-5 hours, then dry, sieve, briquette, and then pre-fire at 1100°C-1200°C for 1-3 hours to obtain blocky solids, crush the blocky solids and add sintering aids Li 2 CO 3 , again ball milled 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; wherein the sintering aid is Ba 0.9 Ca 0.1 Ti 0.9 Zr 0.1 o 3 0.5wt% of powder mass;

[0043] (2) According to the chemical formula CoFe 2 o 4 will analyze pure Co 2 o 3 and Fe 2 o 3 After preparation, it is mixed evenly by ball milling, then dried, sieved, and briquetting, and then pre-fired at...

Embodiment 1

[0051] 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 / xCoFe 2 o 4 , where x is CoFe 2 o 4 The mole percentage of , and x = 0.1.

[0052] The preparation method of the above-mentioned layered magnetoelectric composite material comprises the following steps:

[0053] (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 1150°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 0.1 o 3 In, the mass is Ba 0.9 Ca 0.1 Ti ...

Embodiment 2

[0065] 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 / xCoFe 2 o 4 , where x is CoFe 2 o 4 The mole percentage, 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 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 1100°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 o 3 In, the mass is Ba 0.9 Ca 0.1 Ti 0.9...

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Abstract

The invention discloses a Ba0.9Ca0.1Ti0.9Zr0.1O3 / CoFe2O4 layered magnetoelectric composite and a preparation method thereof. The method comprises the following steps: preparing BaCO3, CaCO3, TiO2 and ZrO2 taken as raw materials respectively into precursor powder Ba0.9Ca0.1Ti0.9Zr0.1O3 and Co2O3, and preparing Fe2O3 as a raw material into precursor powder CoFe2O4; adding the two kinds of powder into a polyvinyl alcohol (PVA) aqueous solution, pelleting respectively, and pressing the two kinds of materials into a sandwich-shaped green body, wherein an upper layer and a lower layer are made from Ba0.9Ca0.1Ti0.9Zr0.1O3, and a middle layer is made from CoFe2O4; sintering the prepared green body at the temperature of 1,100 DEG C to obtain the layered magnetoelectric composite. The prepared Ba0.9Ca0.1Ti0.9Zr0.1O3 / CoFe2O4 layered magnetic composite has the advantages of simple preparation process, low cost, high dielectric performance, high ferroelectric performance, high magnetic performance and high magnetoelectric coupling performance.

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 / CoFe 2 o 4 Layered magnetoelectric composite material and its preparation method. Background technique [0002] With the rapid development of information and electronic technology, electronic devices are miniaturized and multi-functional, and functional composite materials have become more and more research hotspots in the field of material science. Because of its ferroelectricity and ferromagnetism at the same time, magnetoelectric composite materials can also respond to electric fields and magnetic fields, and achieve mutual conversion between electric field signals and magnetic field signals, making them suitable for high-precision magnetic field or electric field sensors, magnetoelectric transformers and microwave devices. And other fields have very attractive application prospects, and are currently mainly used as magnetoelectric sens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/26
CPCC04B35/49C04B35/2666C04B2235/3208C04B2235/3215C04B2235/3275
Inventor 蒲永平师裕彭鑫田一冲
Owner SHAANXI UNIV OF SCI & TECH
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