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Preparation method of micron-sized regular square-strip-shaped Bi2Fe4O9 multiferroic material, product and application thereof

A bi2fe4o9, multiferroic material technology, applied in the field of material science, can solve the problems of difficult synthesis of pure phase, incomplete reaction, poor repeatability, etc., and achieve the effect of green environmental protection, low equipment requirements and regular morphology in the synthesis process

Active Publication Date: 2021-09-03
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Bi 2 Fe 4 o 9 It is a room temperature multiferroic ceramic material with broad application prospects, but the volatilization of reactants during the synthesis process easily leads to incomplete reaction, not only is it difficult to synthesize pure phase Bi 2 Fe 4 o 9 , and the reproducibility of uniform morphology is poor. In addition, the existing preparation methods usually require multi-step reactions at high temperatures or the auxiliary effects of surfactants or organic solvents.

Method used

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  • Preparation method of micron-sized regular square-strip-shaped Bi2Fe4O9 multiferroic material, product and application thereof
  • Preparation method of micron-sized regular square-strip-shaped Bi2Fe4O9 multiferroic material, product and application thereof
  • Preparation method of micron-sized regular square-strip-shaped Bi2Fe4O9 multiferroic material, product and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Add 1 mmol of Bi(NO 3 ) 3 ·5H 2 O, keep stirring for 30min, then add 1.5mmol of Fe(NO 3 ) 3 9H 2 O, continue stirring for 30min to obtain Bi 3+ with Fe 3+ The mol ratio is a mixed solution of 1:1.5;

[0038] (2) Add 16g of NaOH to the above mixed solution, so that the NaOH concentration in the mixed solution is 10mol / L, continue to stir for 2h, obtain the precursor suspension, and transfer it to a 50mL reactor liner;

[0039] (3) Seal the inner liner of the above-mentioned reaction kettle containing the precursor solution in the reaction kettle, react at 180°C for 12 hours, then cool naturally in the air to room temperature, take out the reaction product, filter, and wash with deionized water and absolute ethanol respectively , dried to obtain micron-scale regular square bars Bi 2 Fe 4 o 9 Multiferroic materials.

Embodiment 2

[0041] (1) Add 1 mmol of Bi(NO 3 ) 3 ·5H 2 O, keep stirring for 30min, then add 2mmol of Fe(NO 3 ) 3 9H 2 O, continue stirring for 30min to obtain Bi 3+ with Fe 3+ The mol ratio is a mixed solution of 1:2;

[0042] (2) Add 14.4 g of NaOH to the above mixed solution, so that the NaOH concentration in the mixed solution is 9mol / L, and continue to stir for 2 hours to obtain a precursor suspension, which is transferred to a 50mL reactor liner;

[0043] (3) Seal the inner liner of the above-mentioned reaction kettle containing the precursor solution in the reaction kettle, react at 180°C for 12 hours, then cool naturally in the air to room temperature, take out the reaction product, filter, and wash with deionized water and absolute ethanol respectively , dried to obtain micron-scale regular square bars Bi 2 Fe 4 o 9 Multiferroic materials.

Embodiment 3

[0045] (1) Add 1 mmol of Bi(NO 3 ) 3 ·5H 2 O, keep stirring for 30min, then add 2mmol of Fe(NO 3 ) 3 9H 2 O, continue stirring for 30min to obtain Bi 3+ with Fe 3+ The mol ratio is a mixed solution of 1:2;

[0046] (2) Add 16g of NaOH to the above mixed solution, so that the NaOH concentration in the mixed solution is 10mol / L, continue to stir for 2h, obtain the precursor suspension, and transfer it to a 50mL reactor liner;

[0047] (3) Seal the inner liner of the above-mentioned reaction kettle containing the precursor solution in the reaction kettle, react at 180°C for 12 hours, then cool naturally in the air to room temperature, take out the reaction product, filter, and wash with deionized water and absolute ethanol respectively , dried to obtain micron-scale regular square bars Bi 2 Fe 4 o 9 Multiferroic materials.

[0048] Micron-scale regular square bar Bi 2 Fe 4 o 9 The XRD patterns of multiferroic materials are as follows figure 1 As shown, all the dete...

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Abstract

The invention discloses a preparation method of a micron-sized regular square-strip-shaped Bi2Fe4O9 multiferroic material. By taking Bi (NO3)3.5H2O as a bismuth source, Fe(NO3)3.9H2O as an iron source and deionized water as a solvent, the hydrothermal time is controlled by adjusting the molar ratio of Bi<3+> to Fe<3+> and the concentration of a mineralizer NaOH; the micron-sized regular square-strip-shaped Bi2Fe4O9 multiferroic material which is regular in morphology, high in purity, good in uniformity and high in crystallinity is synthesized through a wet chemical method. The preparation method is simple in step, low in equipment requirement, free of auxiliary effects of an organic solvent, a surfactant and the like and environmentally friendly, the side length of the square section of the multiferroic material is 1.5-2.5 microns, the axial length of the multiferroic material is 10-14 microns, and the multiferroic material has certain visible light absorption capacity and room-temperature ferromagnetism and has a wide application prospect in the field of electronic ceramics.

Description

technical field [0001] The invention belongs to the field of material science, in particular to a micron-order regular square bar-shaped Bi 2 Fe 4 o 9 Preparation methods, products and applications of multiferroic materials. Background technique [0002] As a promising perovskite phase ternary metal oxide, multiferroic bismuth ferrite has attracted extensive attention due to its unique physical and chemical properties, and has been widely used in ceramic capacitors, detectors, sensors , ferroelectric ultrafast optoelectronic devices and other fields are widely used. Multiferroic bismuth ferrite has a variety of ferrites at the same time, and the various ferrites can be coupled and synergized to realize the adjustment of order parameters in more dimensions, and the electrode can be adjusted by changing the size of the external magnetic field Polarization, or adjusting the magnetic polarization by changing the magnitude of the external electric field, also has broad applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00C04B35/453
CPCC01G49/0018C04B35/453C01P2002/72C01P2002/80C01P2004/03C01P2004/04C01P2006/42
Inventor 尹思敏李文强许铭冬刘顺朱敏袁永锋郭绍义
Owner ZHEJIANG SCI-TECH UNIV
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