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KNN-based layered magnetoelectric composite and preparation method thereof

A magnetoelectric composite material and base-layer technology, applied in the field of material science, can solve problems such as uneven dispersion and low magnetoelectric voltage coefficient, and achieve the effects of improved performance, excellent ferroelectric and magnetoelectric properties, and simple and easy preparation methods

Inactive Publication Date: 2017-01-04
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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  • KNN-based layered magnetoelectric composite and preparation method thereof
  • KNN-based layered magnetoelectric composite and preparation method thereof
  • KNN-based layered magnetoelectric composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The chemical formula of layered magnetoelectric composite material is: (1-x)(K 0.45 Na 0.55 ) 0.98 Li 0.02 (Nb 0.77 Ta 0.18 Sb 0.05 )O 3 / xNi 0.37 Cu 0.20 Zn 0.43 Fe 1.92 o 3.88 , where x is Ni 0.37 Cu 0.20 Zn 0.43 Fe 1.92 o 3.88 The mass percentage of , and x = 0.1.

[0041] The preparation method of the above-mentioned layered magnetoelectric composite material comprises the following steps:

[0042] (1) According to the chemical formula (K 0.45 Na 0.55 ) 0.98 Li 0.02 (Nb 0.77 Ta 0.18 Sb 0.05 )O 3 Analytical pure K 2 CO 3 、Na 2 CO 3 , Li 2 CO 3 , Nb 2 o 5 , Sb 2 o 5 and Ta 2 o 5 After preparation, it was mixed uniformly by ball milling for 21 hours, then dried, sieved, briquetting, and then pre-fired at 910°C for 2 hours to obtain a block product, and then the block product was crushed and passed through a 120-mesh sieve to obtain (K 0.45 Na 0.55 ) 0.98 Li 0.02 (Nb 0.77 Ta 0.18 Sb 0.05 )O 3 Powder;

[0043] (2) According to...

Embodiment 2

[0054] The chemical formula of layered magnetoelectric composite material is: (1-x)(K 0.45 Na 0.55 ) 0.98 Li 0.02 (Nb 0.77 Ta 0.18 Sb 0.05 )O 3 / xNi 0.37 Cu 0.20 Zn 0.43 Fe 1.92 o 3.88 , where x is Ni 0.37 Cu 0.20 Zn 0.43 Fe 1.92 o 3.88 The mass percentage of , and x = 0.2.

[0055] The preparation method of the above-mentioned layered magnetoelectric composite material comprises the following steps:

[0056] (1) According to the chemical formula (K 0.45 Na 0.55 ) 0.98 Li 0.02 (Nb 0.77 Ta 0.18 Sb 0.05 )O 3 Analytical pure K 2 CO 3 、Na 2 CO 3 , Li 2 CO 3 , Nb 2 o 5 , Sb 2 o 5 and Ta 2 o 5 After preparation, it was mixed uniformly by ball milling for 22 hours, then dried, sieved, briquetting, and then pre-fired at 920°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 (K 0.45 Na 0.55 ) 0.98 Li 0.02 (Nb 0.77 Ta 0.18 Sb 0.05 )O 3 Powder;

[0057] (2) According to...

Embodiment 3

[0068] The chemical formula of layered magnetoelectric composite material is: (1-x)(K 0.45 Na 0.55 ) 0.98 Li 0.02 (Nb 0.77 Ta 0.18 Sb 0.05 )O 3 / xNi 0.37 Cu 0.20 Zn 0.43 Fe 1.92 o 3.88 , where x is Ni 0.37 Cu 0.20 Zn 0.43 Fe 1.92 o 3.88 The mass percentage of x=0.3.

[0069] The preparation method of the above-mentioned layered magnetoelectric composite material comprises the following steps:

[0070] (1) According to the chemical formula (K 0.45 Na 0.55 ) 0.98 Li 0.02 (Nb 0.77 Ta 0.18 Sb 0.05 )O 3 Analytical pure K 2 CO 3 、Na 2 CO 3 , Li 2 CO 3 , Nb 2 o 5 , Sb 2 o 5 and Ta 2 o 5 After preparation, it was mixed uniformly by ball milling for 23 hours, then dried, sieved, briquetting, and then pre-fired at 930°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 (K 0.45 Na 0.55 ) 0.98 Li 0.02 (Nb 0.77 Ta 0.18 Sb 0.05 )O 3 Powder;

[0071] (2) According to the che...

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Abstract

The invention discloses a KNN-based layered magnetoelectric composite and a preparation method thereof. The preparation method includes the steps that (K0.45Na0.55)0.98Li0.02(Nb0.77Ta0.18Sb0.05)O3 powder and Ni0.37Cu0.20Zn0.43Fe1.92O3.88 powder are subjected to granulation and then subjected to compression moulding in a mould in a 2-2 composite layer piling and overlying arrangement mode, then a PVA adhesive is discharged, sintering is carried out at 1060-1090 DEG C, and the layered magnetoelectric composite can be obtained. According to the KNN-based layered magnetoelectric composite and the preparation method thereof, a ferroelectric phase and a ferromagnetic phase are co-sintered in a layered composite mode by adopting the 2-2 composite layer piling and overlying arrangement mode for the two kinds of powder, interreaction between the two phases can be effectively inhibited, and accordingly the characteristics of the two phases can be kept, so that the KNN-based layered magnetoelectric composite has a high Curie temperature and good ferroelectricity and ferromagnetism.

Description

technical field [0001] The invention belongs to the field of material science, and relates to a KNN-based magnetoelectric composite material with high Curie temperature, high ferroelectricity and ferromagnetic properties 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 ferromagnet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622H01F1/36H01F41/02
CPCC04B35/495C04B35/622C04B2235/3201C04B2235/3203C04B2235/3251C04B2235/3272C04B2235/3279C04B2235/3281C04B2235/3284C04B2235/3294C04B2235/725H01F1/344H01F1/36H01F41/0246
Inventor 杨海波张锦涛林营朱建锋王芬
Owner SHAANXI UNIV OF SCI & TECH
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