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Preparation method of bismuth ferrite BiFeO3 monocrystal micrometer sheet

A technology of micron flakes and bismuth ferrite, which is applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the problems of low product purity, difficulty in controlling particle size and shape, poor controllability of reaction, etc., and achieve The process is simple, the feasibility and controllability are good, and the cost is low

Active Publication Date: 2013-01-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the methods for preparing bismuth-iron compounds mainly use high-temperature solid-phase method and sol-gel method, which have poor reaction controllability and low product purity.
Due to the high temperature calcination process, the particle agglomeration is very serious, and the size and shape of the particles are difficult to control

Method used

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  • Preparation method of bismuth ferrite BiFeO3 monocrystal micrometer sheet
  • Preparation method of bismuth ferrite BiFeO3 monocrystal micrometer sheet

Examples

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example 1

[0021] 1) Weigh ferric nitrate and bismuth ammonium citrate at a molar ratio of 1:1, add deionized water and stir thoroughly to form a suspension containing bismuth ammonium citrate and ferric nitrate;

[0022] 2) Under stirring, add an aqueous potassium hydroxide solution to the suspension containing bismuth ammonium citrate and ferric nitrate prepared in step 1), to obtain a suspension containing bismuth and iron oxyhydroxide precipitates;

[0023] 3) Transfer the obtained suspension of oxyhydroxide precipitation containing bismuth and iron to the inner tank of the reactor, adjust the volume of the reaction material in the inner tank of the reactor with deionized water to reach 90% of the volume of the inner tank of the reactor, and stir In 10 minutes, in the reaction mass, the molar concentration of ferric nitrate and bismuth amine citrate was 0.05mol / L, and the molar concentration of potassium hydroxide was 0.6 mol / L, and the volume base of molar concentration was all intro...

example 2

[0026] 1) Weigh ferric nitrate and bismuth ammonium citrate at a molar ratio of 1:1, add deionized water and stir thoroughly to form a suspension containing bismuth ammonium citrate and ferric nitrate;

[0027] 2) Under stirring, add an aqueous potassium hydroxide solution to the suspension containing bismuth ammonium citrate and ferric nitrate prepared in step 1), to obtain a suspension containing bismuth and iron oxyhydroxide precipitates;

[0028] 3) Transfer the obtained suspension of oxyhydroxide precipitation containing bismuth and iron to the inner tank of the reactor, adjust the volume of the reaction material in the inner tank of the reactor with deionized water to reach 90% of the volume of the inner tank of the reactor, and stir In 10 minutes, in the reaction mass, the molar concentration of ferric nitrate and bismuth amine citrate was 0.05mol / L, and the molar concentration of potassium hydroxide was 0.4 mol / L, and the volume base of molar concentration was all intro...

example 3

[0031] 1) Weigh ferric nitrate and bismuth ammonium citrate at a molar ratio of 1:1, add deionized water and stir thoroughly to form a suspension containing bismuth ammonium citrate and ferric nitrate;

[0032] 2) Under stirring, add an aqueous potassium hydroxide solution to the suspension containing bismuth ammonium citrate and ferric nitrate prepared in step 1), to obtain a suspension containing bismuth and iron oxyhydroxide precipitates;

[0033] 3) Transfer the obtained suspension of oxyhydroxide precipitation containing bismuth and iron to the inner tank of the reactor, adjust the volume of the reaction material in the inner tank of the reactor with deionized water to reach 90% of the volume of the inner tank of the reactor, and stir In 10 minutes, in the reaction mass, the molar concentration of ferric nitrate and bismuth ammonium citrate was 0.05mol / L, and the molar concentration of potassium hydroxide was 0.8 mol / L, and the volume base of molar concentration was all in...

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Abstract

The invention discloses a preparation method of a bismuth ferrite BiFeO3 monocrystal micrometer sheet, which comprises the steps of: with ferric nitrate and ammonium bismuth citrate as raw materials, adding deionized water and adding quantitative potassium hydroxide for promoting crystallization, and carrying out a hydrothermal reaction at a temperature of 160-240 DEG C to prepare the bismuth ferrite BiFeO3 monocrystal micrometer sheet. The preparation method has the advantages of simple process, easy control, no pollution, low cost, and easy mass production. The prepared bismuth ferrite BiFeO3 monocrystal micrometer sheet is stable in crystallization quality, and has a wide potential application prospect in fields such as a transducer, a sensor, a storage and photocatalysis.

Description

technical field [0001] The invention relates to a bismuth ferrite BiFeO 3 The invention discloses a method for preparing single-crystal microsheets, which belongs to the field of inorganic non-metallic materials. Background technique [0002] The performance of functional materials depends largely on their morphology, size and crystallinity, and the control of microscopic morphology is of great value to the application of materials. The advancement of science and technology and the miniaturization of electronic devices have also put forward more and more requirements for the size of materials. Therefore, the preparation of controlled material morphology has become a focus of attention and research in materials science in recent years. [0003] With the development of the information industry, in line with the pursuit of better performance such as high speed, large capacity, and low loss, people have put forward higher and higher requirements for the integration and miniatu...

Claims

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Application Information

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IPC IPC(8): C30B29/22C30B7/10
Inventor 韩高荣杨鑫徐刚任召辉魏晓刘涌沈鸽
Owner ZHEJIANG UNIV
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