Ca(Zn1/3Nb2/3)O3-based high-frequency layered magnetoelectric composite material and preparation method thereof

A magnetoelectric composite material, high-frequency technology, applied in the field of material science, can solve the problems of poor magnetoelectric properties, difficult sintering of two phases, uneven dispersion, etc., achieve excellent dielectric and magnetoelectric properties, simple and easy preparation method, Inhibition of reciprocal effects

Active Publication Date: 2015-05-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the problem of uneven dispersion of the piezoelectric phase (ferromagnetic phase) in the ferromagnetic (piezoelectric) matrix, the magnetoelectric voltage coefficient of this type of structure material is low
Due to the problems of thermal shrinkage and sintering temperature of the existing 2-2 type magnetoelectric composite materials, the two phases are not easy to sinter together, and are prone to delamination, warping, and fracture, resulting in poor magnetoelectric properties

Method used

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  • Ca(Zn1/3Nb2/3)O3-based high-frequency layered magnetoelectric composite material and preparation method thereof
  • Ca(Zn1/3Nb2/3)O3-based high-frequency layered magnetoelectric composite material and preparation method thereof
  • Ca(Zn1/3Nb2/3)O3-based high-frequency layered magnetoelectric composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Ca(Zn 1 / 3 Nb 2 / 3 )O 3 The chemical formula of the high-frequency layered magnetoelectric composite material is: (1-x)Ca(Zn 1 / 3 Nb 2 / 3 )O 3 / xNi 0.8 Zn 0.2 Fe2 o 4 , where x is Ni 0.8 Zn 0.2 Fe 2 o 4 The mass percentage of , and x = 0.1.

[0045] The above Ca(Zn 1 / 3 Nb 2 / 3 )O 3 A method for preparing a high-frequency layered magnetoelectric composite material, comprising the following steps:

[0046] (1) According to the chemical formula Ca(Zn 1 / 3 Nb 2 / 3 )O 3 will analyze pure CaCO 3 , ZnO, Nb 2 o 5 After preparation, it was mixed evenly by wet ball milling for 4 hours, then dried, sieved, briquetting, and then pre-fired at 1150°C for 6 hours to obtain a block product, and then the block product was crushed and passed through a 120-mesh sieve to obtain Ca(Zn 1 / 3 Nb 2 / 3 )O 3 Powder;

[0047] (2) According to the chemical formula Ni 0.8 Zn 0.2 Fe 2 o 4 Will analyze pure NiO, ZnO, Fe 2 o 3 After the preparation, it was mixed evenly by wet ball ...

Embodiment 2

[0055] Ca(Zn 1 / 3 Nb 2 / 3 )O 3 The chemical formula of the high-frequency layered magnetoelectric composite material is: (1-x)Ca(Zn 1 / 3 Nb 2 / 3 )O 3 / xNi 0.8 Zn 0.2 Fe 2 o 4 , where x is Ni 0.8 Zn 0.2 Fe 2 o 4 The mass percentage of , and x = 0.2.

[0056] The above Ca(Zn 1 / 3 Nb 2 / 3 )O 3 A method for preparing a high-frequency layered magnetoelectric composite material, comprising the following steps:

[0057] (1) According to the chemical formula Ca(Zn 1 / 3 Nb 2 / 3 )O 3 will analyze pure CaCO 3 , ZnO, Nb 2 o 5 After preparation, it was mixed evenly by wet ball milling for 5 hours, then dried, sieved, briquetting, and then pre-fired at 1200°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 Ca(Zn 1 / 3 Nb 2 / 3 )O 3 Powder;

[0058] (2) According to the chemical formula Ni 0.8 Zn 0.2 Fe 2 o 4 Will analyze pure NiO, ZnO, Fe 2 o 3 After preparation, it was mixed evenly by wet ball mi...

Embodiment 3

[0066] Ca(Zn 1 / 3 Nb 2 / 3 )O 3 The chemical formula of the high-frequency layered magnetoelectric composite material is: (1-x)Ca(Zn 1 / 3 Nb 2 / 3 )O 3 / xNi 0.8 Zn 0.2 Fe 2 o 4 , where x is Ni 0.8 Zn 0.2 Fe 2 o 4 The mass percentage of x=0.3.

[0067] The above Ca(Zn 1 / 3 Nb 2 / 3 )O 3 A method for preparing a high-frequency layered magnetoelectric composite material, comprising the following steps:

[0068] (1) According to the chemical formula Ca(Zn 1 / 3 Nb 2 / 3 )O 3 will analyze pure CaCO 3 , ZnO, Nb 2 o 5 After preparation, it was mixed evenly by wet ball milling for 4 hours, then dried, sieved, briquetting, and then pre-fired at 1200°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 the formula Ca( Zn 1 / 3 Nb 2 / 3 )O 3 Powder;

[0069] (2) According to the chemical formula Ni 0.8 Zn 0.2 Fe 2 o 4 Will analyze pure NiO, ZnO, Fe 2 o 3 After preparation, it was mixed evenly by wet b...

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Abstract

The invention discloses a Ca(Zn1/3Nb2/3)O3-based high-frequency layered magnetoelectric composite material and a preparation method thereof. The preparation method comprises the following steps: granulating Ca(Zn1/3Nb2/3)O3 powder and Ni0.8Zn0.2Fe2O4 powder, and pressing and molding the powder in a mold according to a 2-2 composite layered superposition arrangement mode; and discharging a PVA adhesive, and sintering at the temperature of 1250-1300 DEG C, thereby obtaining the Ca(Zn1/3Nb2/3)O3-based high-frequency layered magnetoelectric composite material. Because the Ca(Zn1/3Nb2/3)O3 powder and Ni0.8Zn0.2Fe2O4 powder can be arranged according to the 2-2 composite layered superposition arrangement mode, and a ferroelectric phase and a ferromagnetic phase are co-fired together by virtue of a layered compounding mode, mutual reaction between the two phases can be effectively inhibited, and the respective characteristics are maintained. Therefore, the composite material has high dielectric properties and also has good ferromagnetic properties.

Description

technical field [0001] The invention belongs to the field of material science and relates to a Ca(Zn 1 / 3 Nb 2 / 3 )O 3 High-frequency layered magnetoelectric composite material and its preparation method. Background technique [0002] With the continuous development of information technology and the miniaturization and multifunctionalization of devices, people's research interest in multifunctional materials with both current collection and magnetism is constantly increasing. Therefore, the miniaturization and miniaturization of components including ferroelectric dielectric materials and magnetic materials is an inevitable trend, and the magnetoelectric composite materials that integrate dielectric properties and ferromagnetism have the same volume but can be used on circuits Has more functions. [0003] Microwave dielectric ceramics have excellent dielectric properties (such as dielectric constant and dielectric loss) at high frequencies. Microwaves have high frequency, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622
Inventor 杨海波刘潇林营朱建锋王芬
Owner SHAANXI UNIV OF SCI & TECH
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