Two-layer textured vectolite-lead zirconate titanate multiferroic composite film material and preparation method thereof

A technology of cobalt ferrite and lead zirconate titanate, which is applied in the field of composite magnetoelectric multiferroic materials, can solve the problems of large leakage current, small effective coupling area of ​​ferroelectric/ferromagnetic phase, etc., and improve the magnetoelectric coupling effect , The effect of simple process

Inactive Publication Date: 2014-09-10
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Composite materials generally have the following three forms: 1-3 columnar structure, 0-3 granular composite structure and 2-2 laminated structure. Due to the barrier of the ferrodielectric layer, the 2-2 type composite material can fundamentally eliminate multiferroic properties. The problem of large leakage current in composite materials, but the effective coupling area of ​​the ferroelectric / ferromagnetic phase is relatively small, so it is necessary to explore a large magnetoelectric coupling coefficient

Method used

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  • Two-layer textured vectolite-lead zirconate titanate multiferroic composite film material and preparation method thereof
  • Two-layer textured vectolite-lead zirconate titanate multiferroic composite film material and preparation method thereof
  • Two-layer textured vectolite-lead zirconate titanate multiferroic composite film material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] When x=0.52, double-layer CoFe is obtained 2 o 4 -Pb(Zr 0.52 Ti 0.48 )O 3 Textured composite multiferroic film

[0036] 1) Slurry configuration:

[0037] Weigh CoFe 2 o 4 Powder, adding organic solvent, dispersant and defoamer, planetary ball milling for 4 hours, adding binder to it, and secondary ball milling for 3 hours to obtain CoFe 2 o 4 Casting precursor slurry, solid content is 45wt%; Adding molar ratio to it is 5% CoFe 2 o 4 Rod-shaped crystals, stirred by magnetic force for 0.5h, and left to defoam for 0.5h to obtain CoFe 2 o 4 Ferromagnetic phase mixed slurry;

[0038] Weigh Pb(Zr 0.52 Ti 0.48 )O 3 Powder, adding organic solvent, dispersant and defoamer, planetary ball milling for 4 hours, adding binder to it, and secondary ball milling for 3 hours to obtain Pb(Zr x Ti 1-x )O 3 Casting precursor slurry with a solid content of 65wt%; adding a molar ratio of 5% flake SrTiO 3 single crystal, magnetically stirred for 0.5h, and left to defoam for...

Embodiment 2

[0043] When x=0, a double-layer CoFe is obtained 2 o 4 -PbTiO 3 Textured composite multiferroic film

[0044] 1) Slurry configuration:

[0045] Weigh CoFe 2 o 4 Powder, adding organic solvent, dispersant and defoamer, planetary ball milling for 5 hours, adding binder to it, and secondary ball milling for 4 hours to obtain CoFe 2 o 4 Casting precursor slurry, the solid content is 40wt%, and the molar ratio of 8% CoFe is added thereto 2 o 4 Rod-shaped crystals, stirred by magnetic force for 0.5h, and left to defoam for 0.5h to obtain CoFe 2 o 4 Ferromagnetic phase mixed slurry;

[0046] Weigh PbTiO 3 Powder, adding organic solvent, dispersant and defoamer, planetary ball milling for 5 hours, adding binder to it, and secondary ball milling for 4 hours to obtain PbTiO 3 Casting precursor slurry with a solid content of 70wt%, to which flaky SrTiO was added with a molar ratio of 8% 3 Single crystal, magnetic stirring for 0.5h, standing still for degassing for 0.5h, to o...

Embodiment 3

[0049] When x=0.3, double-layer CoFe is obtained 2 o 4 -PbZr 0.3 Ti 0.7 o 3 Textured composite multiferroic film

[0050] 1) Slurry configuration:

[0051] Weigh CoFe 2 o 4 Powder, add organic solvent, dispersant and defoamer, planetary ball mill for 4.5h, add binder to it, and ball mill for 3.5h twice to obtain precursor slurry with a solid content of 42wt%, adding a molar ratio of 7 %CoFe 2 o 4 Rod-shaped crystals, stirred by magnetic force for 0.5h, and left to defoam for 0.5h to obtain CoFe 2 o 4 Mix slurry.

[0052] Weigh Pb(Zr 0.3 Ti 0.7 )O 3 Powder, add organic solvent, dispersant and defoamer, planetary ball mill for 4.5 hours, add binder to it, and ball mill for 3.5 hours twice to obtain precursor slurry with a solid content of 68wt%, and add a molar ratio of 7 % flake SrTiO 3 single crystal, magnetically stirred for 0.5h, and left to defoam for 0.5h to obtain Pb(Zr 0.3 Ti 0.7 )O 3 Mix slurry.

[0053] 2) Using the oriented grain growth technology,...

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Abstract

The invention relates to a two-layer textured vectolite-lead zirconate titanate multiferroic composite film material which comprises a textured CoFe2O4 film layer and a textured Pb(ZrxTi1-x)O3 film layer, wherein x is larger than or equal to 0 and less than or equal to 0.52. The preparation method comprises the following steps: with CoFe2O4 powder and PbZrxTi1-xO3 powder as raw materials, preparing CoFe2O4 casting precursor slurry and Pb(ZrxTi1-x)O3 casting precursor slurry; adding rod-shaped CoFe2O4 monocrystal into the CoFe2O4 casting precursor slurry so as to obtain ferromagnetic phase mixing slurry; adding sheet SrTiO3 monocrystal into the Pb(ZrxTi1-x)O3 casting precursor slurry to obtain ferroelectric phase mixing slurry; and respectively prepare a CoFe2O4 blank body and a Pb(ZrxTi1-x)O3 blank body by a tape casting forming process, and laminating the two blank bodies, followed by tabletting, binder removal and cofiring, so as to obtain the textured two-layer CoFe2O4-Pb(ZrxTi1-x)O3 multiferroic composite film material. The preparation method is simpler in process, and the obtained ferromagnetic / ferroelectric two-layer textured structure can increase the macroscopic performance of the material and improve the interface characteristic of the material.

Description

technical field [0001] The invention belongs to the field of composite magnetoelectric multiferroic materials, and specifically provides a double-layer textured cobalt ferrite-lead zirconate titanate (CoFe 2 o 4 -Pb(Zr x Ti 1-x )O 3 ) Multiferroic composite membrane material and preparation method. Background technique [0002] Magnetoelectric multiferroic materials not only have ferroelectricity and ferromagnetism, but also exhibit the coupling between the two, that is, the magnetic field can induce electrical polarization, and at the same time, the electric field can also cause changes in the magnetic signal. Due to their special properties, magnetoelectric multiferroic materials have extremely great application prospects in the field of future storage devices, such as electrical writing, magnetic reading storage materials, and multi-state storage. [0003] Single-phase magnetoelectric materials that exist in nature such as Cr 2 o 3 、BiFeO 3 , YMnO 3 etc., but mos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/49C04B35/622
Inventor 简刚邵辉胡庆贤芦笙
Owner JIANGSU UNIV OF SCI & TECH
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