Preparation method of multiferroic bismuth ferrite cubic nanoparticles

A bismuth ferrite and multiferroic technology, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., to achieve the effects of easy control, easy promotion, and simple operation

Inactive Publication Date: 2015-02-04
XINJIANG UNIVERSITY
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Problems solved by technology

[0009] The object of the present invention is to provide a method for preparing pure phase cubic structure multiferroic nano-bismuth ferrite by hydrothermal method to solve the complex preparation process of the prior art and avoid two-phase or multi-phase coexistence phenomenon, and high cost issues

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  • Preparation method of multiferroic bismuth ferrite cubic nanoparticles
  • Preparation method of multiferroic bismuth ferrite cubic nanoparticles
  • Preparation method of multiferroic bismuth ferrite cubic nanoparticles

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[0021] Using high-purity Fe(NO 3 ) 3 9H 2 O, Bi(NO 3 ) 3 ·5H 2 O, respectively as Fe source, Bi source, according to 4.0 g Fe(NO 3 ) 3 9H 2 O , 4.85 g Bi(NO 3 ) 3 ·5H 2 The mass ratio of O was respectively configured into 20ml solutions, and the reaction solution was transferred to a hydrothermal reaction kettle with a polytetrafluoroethylene liner to fully dissolve the reactants under magnetic stirring conditions. Weigh 5.05 g of KOH mineralizer to prepare a 20mol solution. Slowly pour the configured potassium hydroxide solution into the stirring reaction kettle, and continue stirring for 30 min under magnetic stirring conditions. After the stirring, the reaction kettle was sealed, placed in a high-temperature drying oven at 200°C for 6 hours, taken out, and cooled to room temperature naturally. After cooling, take out the reaction kettle and pour the reacted solution into a clean beaker, rinse with deionized water, and ultrasonically oscillate for about one minut...

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Abstract

The invention discloses a preparation method of multiferroic bismuth ferrite cubic nanoparticles and belongs to the technical field of nano materials and preparation thereof. Multiferroic nano material bismuth ferrite powder is prepared by adopting a hydrothermal synthesis method. A high-purity bismuth nitrate pentahydrate, a high-purity iron nitrate nonahydrate and high-purity potassium hydroxide are respectively used as a Bi source and a Fe source. The preparation method comprises the following steps: respectively preparing the bismuth nitrate pentahydrate and the iron nitrate nonahydrate into solutions, fully dissolving and pouring into 4.5M of potassium hydroxide solution and uniformly stirring the mixture under a magnetic stirring condition; putting in a 200 DEG C high-temperature drying box which is modulated in advance and reacting for 6 hours, taking out and naturally cooling to room temperature; and finally, after adjusting the pH value of the solution by using alcohol, drying for 3 hours in the vacuum drying box under the condition that the vacuum degree is 9*10<-3>Pa and the drying temperature is 70 DEG C for 3 hours and taking out to obtain a sample. The preparation method provided by the invention is simple in process, low in cost, simple to operate and convenient for repeated test so as to explore better material performances. Meanwhile, the obtained product is good in uniformity, good in controllability, less in environmental damage and easy to popularize.

Description

technical field [0001] The invention belongs to the technical field of multiferroic nanometer materials and their preparation, and relates to the preparation of single-phase multiferroic materials with ferroelectricity and weak ferromagnetism, in particular to the preparation of nanometer materials with multiferroicity and special morphology of cubic structure. Background technique [0002] Bismuth ferrite is a typical multiferroic material, and it is one of the few single-phase multiferroic materials that have both ferroelectricity and weak ferromagnetism at room temperature, and the ferroelectric and ferromagnetic orders of this material can be A magnetoelectric coupling effect is generated. When an external magnetic field is applied, the material can be transformed into a motorized state, and under the action of an applied electric field, the material can be transformed into a magnetized state. Therefore, it has a wide range of applications in the fields of data storage ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00B82Y30/00B82Y40/00
Inventor 阿布都艾则孜·阿布来提许爱峰雷格冉从海
Owner XINJIANG UNIVERSITY
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