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New prepn process of ferroelectric-ferromagnetic functional complex in three-layer perovskite-like structure

A technology of perovskite structure and composite is applied in the field of new preparation of three-layer perovskite-like structure ferroelectric-ferromagnetic functional composite, which can solve the problem of failure to meet practical application requirements, deterioration of composite performance, and magnetoelectric coefficient. lower problem

Inactive Publication Date: 2005-11-02
WUHAN UNIV OF TECH
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Problems solved by technology

This will cause the possibility of two-phase reaction, and both can only realize the recombination of ferroelectric and ferromagnet on the micron scale, and it is impossible to realize the complete product coupling between ferroelectric and ferromagnetic phase grains, and the composite is inevitable. Defects exist, which lead to deterioration of some properties of the complex
The magnetoelectric coefficient of the complex is still low, which does not meet the requirements of practical applications

Method used

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  • New prepn process of ferroelectric-ferromagnetic functional complex in three-layer perovskite-like structure

Examples

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Embodiment Construction

[0027] example:

[0028] 1.AB 2 m 3 o 10 (A=K, Na, Li, Rb, Cs and their compound ions; B=Ba, Sr, Ca, Pb and their compound ions; M=Nb, Ta and their compound ions) synthesis:

[0029] The raw material BCO 3 , A 2 CO 3 ,M 2 o 5 Massive BCO 3 :A 2 CO 3 : M 2 o 5 = 4:1:3 ingredients, considering A 2 CO 3 For volatility at high temperature, there should be a surplus of 5% in ingredients. After the three raw materials are evenly mixed and fully ground, they are fired at 800-1650°C and kept for 2-48 hours to obtain AB 2 m 3 o 10 .

[0030] Such as KSr 2 Nb 3 o 10 Synthesis of SrCO 3 , K 2 CO 3 with Nb 2 o 5 According to the molar ratio of 4:1:3 ingredients, then add an excess of 5% K 2 CO 3 , mixed evenly, placed in a Pt crucible, heated to 1300-1500°C, kept for 5 hours, cooled to room temperature and taken out to obtain KSr 2 Nb 3 o 10 .

[0031] 2. Acid treatment

[0032] As will be prepared KSr 2 Nb 3 o 10 Soak in excess 5mol / L hydrochloric acid f...

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Abstract

The three-layer ferroelectric and ferromagnetic functional complex in perovskite-like structure is prepared through chemical reaction to synthesize three-layer perovskite-like niobate or tantalite AB2M3O10, where A=K, Na, Li, Rb, Cs and their composite ion, B=Sr, Ba, Ca, Pb and their composite ion, and M=Nb, Ta and their composite iron; acid treatment; inserting organic amine layer; precipitation process to form interlayer ferrite MFe3O4. The three-layer ferroelectric and ferromagnetic functional complex has alternately arranged ferroelectric layer and ferrite layer.

Description

1. Technical field: [0001] The invention belongs to the category of ferroelectric-ferromagnetic functional complexes and provides a new preparation method for a three-layer perovskite-like structure ferroelectric-ferromagnetic functional complexes. 2. Background technology: [0002] Because magnetoelectric materials have good magnetoelectric effects, they have broad application prospects in the microwave field, current measurement of high-voltage transmission lines, broadband magnetic detection, and magnetic field sensors. [0003] Since the 1960s, the international research on magnetoelectric materials has made great progress, and Cr 2 o 3 and other single-phase magnetoelectric materials, but the Neil temperature or Curie temperature of most of these materials is much lower than room temperature, and the magnetoelectric coefficient is small, making it difficult to meet practical requirements. [0004] The current research has designed and prepared a ferroelectric-ferromag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/495
Inventor 张辉方亮袁润章杨卫明鄢俊兵程海斌安继明刘韩星
Owner WUHAN UNIV OF TECH