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SrTiO3-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, and the preparation method is simple and easy to implement, The effect of suppressing the interaction

Active Publication Date: 2015-04-29
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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  • SrTiO3-based high-frequency layered magnetoelectric composite material and preparation method thereof
  • SrTiO3-based high-frequency layered magnetoelectric composite material and preparation method thereof
  • SrTiO3-based high-frequency layered magnetoelectric composite material and preparation method thereof

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Effect test

Embodiment 1

[0044] SrTiO 3 The chemical formula of the base high-frequency layered magnetoelectric composite material is: (1-x)SrTiO 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 = 0.1.

[0045] The above SrTiO 3 A method for preparing a high-frequency layered magnetoelectric composite material, comprising the following steps:

[0046] (1) According to the chemical formula SrTiO 3 will analyze pure SrCO 3 、TiO 2 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 6 hours to obtain a block product, and then the block product was crushed and passed through a 120-mesh sieve to obtain SrTiO 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 preparation, it was mixed evenly by wet ball milling for 6 hours, then dried, sieved, briquetting, and then pre-fired at 1150°C for ...

Embodiment 2

[0055] SrTiO 3 The chemical formula of the base high-frequency layered magnetoelectric composite material is: (1-x)SrTiO 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 SrTiO 3 A method for preparing a high-frequency layered magnetoelectric composite material, comprising the following steps:

[0057] (1) According to the chemical formula SrTiO 3 will analyze pure SrCO 3 、TiO 2 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 SrTiO 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 milling for 5 hours, then dried, sieved, briquetting, and then pre-calcined at 1150°C f...

Embodiment 3

[0066] SrTiO 3 The chemical formula of the base high-frequency layered magnetoelectric composite material is: (1-x)SrTiO 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 SrTiO 3 A method for preparing a high-frequency layered magnetoelectric composite material, comprising the following steps:

[0068] (1) According to the chemical formula SrTiO 3 will analyze pure SrCO 3 、TiO 2 After the 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 SrTiO 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 ball milling for 4 hours, then dried, sieved, briquetting, and then pre-fired at 115...

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Abstract

The invention discloses a SrTiO3-based high-frequency layered magnetoelectric composite material and a preparation method thereof. The preparation method comprises the following steps: granulating SrTiO3 powder and Ni0.8Zn0.2Fe2O4 powder, pressing and molding the powder in a mold according to a 2-2 composite base superposition arrangement mode, discharging a PVA adhesive, sintering at the temperature of 1250 to 1300 DEG C, thereby obtaining the SrTiO3-based high-frequency layered magnetoelectric composite material. Because the SrTiO3 powder and Ni0.8Zn0.2Fe2O4 powder is molded according to the 2-2 composite base superposition arrangement mode, a ferroelectric phase and a ferrimagnetic phase are cofired together in a layered compounding mode, and the mutual reaction between the two phases can be effectively inhibited so as to remain the respective characteristics. Therefore, the composite material has excellent dielectricity and ferromagnetic property.

Description

technical field [0001] The invention belongs to the field of material science and relates to a SrTiO 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 ferroelectricity and ferromagnetism have the same volume but can be used on circuits Has more functions. [0003] Multiferroic materials not only possess a variety of single ferroic properties (such as ferroelectricity, ferromagnetism, and ferroelasticity), but also can produce some new functions through ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/47C04B35/622H10N30/853
Inventor 杨海波刘潇林营朱建锋王芬
Owner SHAANXI UNIV OF SCI & TECH
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