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A micron-scale regular square bar bi 2 fe 4 o 9 Preparation method, product and application of multiferroic material

A bi2fe4o9, multi-ferrous 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 synthesis process, low equipment requirements, and regular morphology.

Active Publication Date: 2022-06-28
ZHEJIANG SCI-TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A micron-scale regular square bar bi <sub>2</sub> fe <sub>4</sub> o <sub>9</sub> Preparation method, product and application of multiferroic material
  • A micron-scale regular square bar bi <sub>2</sub> fe <sub>4</sub> o <sub>9</sub> Preparation method, product and application of multiferroic material
  • A micron-scale regular square bar bi <sub>2</sub> fe <sub>4</sub> o <sub>9</sub> Preparation method, product and application of multiferroic material

Examples

Experimental program
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Effect test

Embodiment 1

[0037] (1) Add 1 mmol of Bi(NO) to 40 mL of deionized water under stirring 3 ) 3 ·5H 2 O, continue to stir for 30min, then add 1.5mmol of Fe(NO 3 ) 3 ·9H 2 O, continue to stir for 30min to obtain Bi 3+ with Fe 3+ The molar ratio of the mixed solution is 1:1.5;

[0038] (2) adding 16g of NaOH to the above-mentioned mixed solution, making the NaOH concentration in the mixed solution 10mol / L, and continuing to stir for 2h to obtain a precursor suspension, which was transferred to a 50mL reactor liner;

[0039] (3) The above-mentioned reaction kettle liner containing the precursor solution was sealed in the reaction kettle, and after 12 hours of reaction at 180 ° C, it was naturally cooled to room temperature in the air, the reaction product was taken out, filtered, and washed with deionized water and absolute ethanol respectively. , drying to obtain micron-scale regular square Bi 2 Fe 4 O 9 Multiferroic material.

Embodiment 2

[0041] (1) Add 1 mmol of Bi(NO) to 40 mL of deionized water under stirring 3 ) 3 ·5H 2 O, continue to stir for 30min, then add 2mmol of Fe(NO 3 ) 3 ·9H 2 O, continue to stir for 30min to obtain Bi 3+ with Fe 3+ The molar ratio of the mixed solution is 1:2;

[0042] (2) 14.4g of NaOH was added to the above mixed solution, so that the NaOH concentration in the mixed solution was 9mol / L, and the stirring was continued for 2h to obtain a precursor suspension, which was transferred to the 50mL reactor liner;

[0043] (3) The above-mentioned reaction kettle liner containing the precursor solution was sealed in the reaction kettle, and after 12 hours of reaction at 180 ° C, it was naturally cooled to room temperature in the air, the reaction product was taken out, filtered, and washed with deionized water and absolute ethanol respectively. , drying to obtain micron-scale regular square Bi 2 Fe 4 O 9 Multiferroic material.

Embodiment 3

[0045] (1) Add 1 mmol of Bi(NO) to 40 mL of deionized water under stirring 3 ) 3 ·5H 2 O, continue to stir for 30min, then add 2mmol of Fe(NO 3 ) 3 ·9H 2 O, continue to stir for 30min to obtain Bi 3+ with Fe 3+ The molar ratio of the mixed solution is 1:2;

[0046] (2) adding 16g of NaOH to the above-mentioned mixed solution, making the NaOH concentration in the mixed solution 10mol / L, and continuing to stir for 2h to obtain a precursor suspension, which was transferred to a 50mL reactor liner;

[0047] (3) The above-mentioned reaction kettle liner containing the precursor solution was sealed in the reaction kettle, and after 12 hours of reaction at 180 ° C, it was naturally cooled to room temperature in the air, the reaction product was taken out, filtered, and washed with deionized water and absolute ethanol respectively. , drying to obtain micron-scale regular square Bi 2 Fe 4 O 9 Multiferroic material.

[0048] Micron-scale regular square bar Bi 2 Fe 4 O 9 Th...

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Abstract

The invention discloses a micron-scale regular square strip-shaped Bi 2 Fe 4 o 9 The preparation method of multiferroic material, with Bi(NO 3 ) 3 ·5H 2 O is the bismuth source, Fe(NO 3 ) 3 9H 2 O is the iron source, using deionized water as the solvent, by adjusting the Bi 3+ with Fe 3+ The molar ratio and the concentration of the mineralizer NaOH, control the hydrothermal time, wet chemical method to synthesize regular shape, high purity, good uniformity, high crystallinity micron-scale regular square Bi 2 Fe 4 o 9 Multiferroic materials. The preparation method has simple steps, low equipment requirements, no need for auxiliary effects of organic solvents and surfactants, and is environmentally friendly. The micron-sized regular square bar-shaped Bi 2 Fe 4 o 9 The square section of multiferroic materials has a side length of 1.5-2.5 μm and an axial length of 10-14 μm, and has a 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, and in particular relates to a micron-level regular square-shaped Bi 2 Fe 4 O 9 Preparation method, product and application of multiferroic material. 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, etc. , ferroelectric ultrafast optoelectronic devices and other fields are widely used. Multiferroic bismuth ferrite has multiple ferrous properties at the same time, and the various ferrous properties can be coupled and synergized with each other to realize the adjustment of order parameters in more dimensions, and the electrode can be adjusted by changing the magnitude of the external magnetic field. It also has broad application prospects in the fields of information storage devices...

Claims

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Application Information

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Patent Type & Authority Patents(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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