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Bismuth ferrite nano-cylinder and preparation method thereof

A technology of bismuth ferrite and cylinders, which is applied in the field of bismuth ferrite nano cylinders and its preparation, can solve the problems of powder particle agglomeration and impurity, and achieve the effects of low cost, low requirements for experimental equipment, and simple production process

Inactive Publication Date: 2014-05-07
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] BiFeO 3 The common preparation methods of powder mainly include solid phase sintering method, sol-gel method, co-precipitation method, etc., but these methods require high-temperature heat treatment in the later stage, which will lead to the agglomeration of powder particles and the generation of impurity phases

Method used

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  • Bismuth ferrite nano-cylinder and preparation method thereof
  • Bismuth ferrite nano-cylinder and preparation method thereof
  • Bismuth ferrite nano-cylinder and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] 1) According to the chemical formula of bismuth ferrite BiFeO 3 Measure and weigh bismuth nitrate and ferric nitrate, then add them to the liner of the polytetrafluoroethylene reactor, add deionized water according to the filling degree of 50%-80%, the molar volume fraction of bismuth ferrite is 0.02mol / L, magnetically stir 0.5-1 hour;

[0027] 2) Slowly add sodium hydroxide into the polytetrafluoroethylene reactor liner in step 1) while stirring, the molar volume fraction of sodium hydroxide is 1mol / L, and magnetically stir for 10-30 minutes;

[0028] 3) Seal the liner of the polytetrafluoroethylene reactor in a stainless steel reactor, conduct a hydrothermal reaction at 130°C, keep it warm for 24 hours, cool it down to room temperature naturally, take out the reaction product, and alternately ultrasonicate it with deionized water and absolute ethanol After cleaning for several times, it is dried in an oven at 60-100° C. to obtain bismuth ferrite nano cylinders.

Embodiment 2

[0030] 1) According to the chemical formula of bismuth ferrite BiFeO 3 Measure and weigh bismuth nitrate and ferric nitrate, then add them to the liner of the polytetrafluoroethylene reactor, add deionized water according to the filling degree of 50%-80%, the molar volume fraction of bismuth ferrite is 0.1mol / L, magnetically stir 0.5-1 hour;

[0031] 2) Slowly add sodium hydroxide into the polytetrafluoroethylene reactor liner in step 1) while stirring, the molar volume fraction of sodium hydroxide is 5mol / L, and magnetically stir for 10-30 minutes;

[0032] 3) Seal the liner of the polytetrafluoroethylene reactor in a stainless steel reactor, conduct a hydrothermal reaction at 180°C, keep it warm for 48 hours, cool it down to room temperature naturally, take out the reaction product, and alternately ultrasonicate it with deionized water and absolute ethanol After cleaning for several times, it is dried in an oven at 60-100° C. to obtain bismuth ferrite nano cylinders.

Embodiment 3

[0034] 1) According to the chemical formula of bismuth ferrite BiFeO 3 Measure and weigh bismuth nitrate and ferric nitrate, then add them to the liner of the polytetrafluoroethylene reactor, add deionized water according to the filling degree of 50%-80%, the molar volume fraction of bismuth ferrite is 0.03mol / L, magnetically stir 0.5-1 hour;

[0035] 2) Slowly add sodium hydroxide into the polytetrafluoroethylene reactor liner in step 1) while stirring, the molar volume fraction of sodium hydroxide is 2mol / L, and magnetically stir for 10-30 minutes;

[0036] 3) Seal the liner of the polytetrafluoroethylene reactor in a stainless steel reactor, conduct a hydrothermal reaction at 150°C, keep it warm for 36 hours, cool it down to room temperature naturally, take out the reaction product, and alternately ultrasonicate it with deionized water and absolute ethanol After cleaning for several times, it is dried in an oven at 60-100° C. to obtain bismuth ferrite nano cylinders.

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Abstract

The invention provides a bismuth ferrite nano-cylinder and a preparation method thereof. Bismuth nitrate and ferric nitrate are taken as raw materials, and the shape of the prepared bismuth ferrite nano-cylinder is controlled by regulating hydrothermal conditions such as key parameters of sodium hydroxide concentration, reaction temperature and time through a hydrothermal method. The bismuth ferrite nano-cylinder prepared through the simple hydrothermal method is 400-800 nanometers in diameter, and 100-400 nanometers in thickness. Compared with the prior art, the preparation method of the bismuth ferrite nano-cylinder provided by the invention is free from pollution, low in cost, simple in production process and easy for industrial production. The synthesized bismuth ferrite nano-cylinder has wide application prospects in the fields of information storage, sensors and microelectronics.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic materials and their preparation, in particular to a bismuth ferrite nano cylinder and a preparation method thereof. Background technique [0002] Multiferroic material is a new type of multifunctional material that has two or more ferrotypes such as ferromagnetism, ferroelectricity and ferroelasticity at the same time, and due to the coupling between various ferrotypes, it will also produce piezomagnetic effect, The magnetoelectric effect and magnetron polarization reversal effects have broad application prospects in the fields of data storage, spintronics, and microelectronics, and have attracted widespread attention. Currently, bismuth ferrite BiFeO 3 As a single-phase multiferroic material, it has a trigonal perovskite structure (belonging to the R3c space group), and is one of the few materials that have both ferroelectricity and ferromagnetism at room temperature, and its ferr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00B82Y40/00B82Y30/00
Inventor 王大伟王美丽崔岩刘峰斌屈敏焦志伟
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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