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Cobalt material doping with ferrous acid bismuth multi-iron and preparation method thereof

A technology of multiferroic materials and bismuth ferrite, which is applied in the direction of magnetism of inorganic materials, can solve the problems of no major improvement, difficult saturation polarization of ferroelectricity, and limited application, and achieve low cost, stable crystal quality, and equipment simple effect

Inactive Publication Date: 2010-08-25
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] As early as 1960, BiFeO was discovered 3 Coexisting ferroelectricity and magnetism, but due to the large leakage conduction, it is difficult to saturate and polarize the ferroelectricity at room temperature, which greatly limits its application
With the maturity of pulsed laser deposition method, BiFeO 3 The problem of large leakage conductance has been basically solved, but its weak magnetic properties at room temperature have not been greatly improved, and there is still a gap from application

Method used

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  • Cobalt material doping with ferrous acid bismuth multi-iron and preparation method thereof
  • Cobalt material doping with ferrous acid bismuth multi-iron and preparation method thereof
  • Cobalt material doping with ferrous acid bismuth multi-iron and preparation method thereof

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Effect test

Embodiment 1

[0019] 1) According to the chemical formula BiCo of the cobalt-doped bismuth ferrite to be synthesized x Fe 1-x o 3 , x=0.05, measure and weigh bismuth nitrate, iron nitrate and cobalt nitrate, be dissolved in dilute nitric acid aqueous solution together, form the aqueous solution that contains bismuth nitrate, iron nitrate and cobalt nitrate, and the concentration of metal ion in the adjustment solution is 0.05mol / L ;

[0020] 2) Under stirring, add excess potassium hydroxide aqueous solution to the aqueous solution containing bismuth nitrate, iron nitrate and cobalt nitrate prepared in step 1), filter and wash the precipitate obtained to obtain the oxyhydroxide of bismuth, iron and cobalt precipitation;

[0021] 3) Add the oxyhydroxide precipitation of bismuth, iron and cobalt and potassium hydroxide into the inner tank of the reactor with an inner tank volume of 60mL, and adjust the volume of the reaction materials in the inner tank of the reactor with deionized water to...

Embodiment 2

[0024] 1) According to the chemical formula BiCo of the cobalt-doped bismuth ferrite to be synthesized x Fe 1-x o 3 , x=0.03, measure and weigh bismuth nitrate, iron nitrate and cobalt nitrate, be dissolved in dilute nitric acid aqueous solution together, form the aqueous solution that contains bismuth nitrate, iron nitrate and cobalt nitrate, and the concentration of metal ion in the adjustment solution is 0.3mol / L ;

[0025] 2) Under stirring, add excess potassium hydroxide aqueous solution to the aqueous solution containing bismuth nitrate, iron nitrate and cobalt nitrate prepared in step 1), filter and wash the precipitate obtained to obtain the oxyhydroxide of bismuth, iron and cobalt precipitation;

[0026] 3) Add the oxyhydroxide precipitation of bismuth, iron and cobalt and potassium hydroxide into the inner tank of the reactor with an inner tank volume of 60mL, and adjust the volume of the reaction materials in the inner tank of the reactor with deionized water to ...

Embodiment 3

[0029] 1) According to the chemical formula BiCo of the cobalt-doped bismuth ferrite to be synthesized x Fe 1-x o 3 , x=0.07, measure and weigh bismuth nitrate, iron nitrate and cobalt nitrate, be dissolved in dilute nitric acid aqueous solution together, form the aqueous solution that contains bismuth nitrate, iron nitrate and cobalt nitrate, and the concentration of metal ion in the adjustment solution is 0.40mol / L ;

[0030] 2) Under stirring, add excess potassium hydroxide aqueous solution to the aqueous solution containing bismuth nitrate, iron nitrate and cobalt nitrate prepared in step 1), filter and wash the precipitate obtained to obtain the oxyhydroxide of bismuth, iron and cobalt precipitation;

[0031] 3) Add the oxyhydroxide precipitation of bismuth, iron and cobalt and potassium hydroxide into the inner tank of the reactor with an inner tank volume of 60mL, and adjust the volume of the reaction materials in the inner tank of the reactor with deionized water to...

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Abstract

The invention discloses cobalt doping bismuth ferric material, the chemical formula of which is BicoxFe1-xO3; x is not more than 0.07 while is more than 0. The preparation method is that: oxyhydroxide precipitation of iron, bismuth and cobalt is made as the reaction material; potassium hydroxide with suitable concentration is added to promote crystallization; cobalt doping bismuth ferric powder is then obtained by hydrothermal reaction under the temperature of 120 degrees to 200 degrees. The invention dramatically enhances the magnetism of the bismuth ferric by doping cobalt; furthermore, theinvention has simple technique, has no pollution, low cost and is suitable for mass production. The cobalt doping bismuth ferric material of the invention has stable crystallization quality and has wide application prospect in the fields such as information storage, satellite communication, precise control, circuit measurement of high voltage transmission lines and magnetoelectric sensors.

Description

technical field [0001] The invention relates to a cobalt-doped bismuth ferrite multiferroic material and a preparation method thereof, belonging to the field of inorganic non-metallic materials. Background technique [0002] The development of magnetic materials and electronic materials permeates all fields of modern technology, and people's research interest in multiferroic materials that collect electricity and magnetism is increasing day by day. BiFeO 3 With a perovskite structure, it has ferroelectricity (Curie temperature 810°C) and weak antiferromagnetism (Niell temperature 380°C) at room temperature. Multiferroic materials exist and have magnetoelectric coupling properties. The multifunctionality of bismuth ferrite increases the freedom of device design, and it has broad application prospects in information storage, satellite communication, precision control, circuit measurement of high-voltage transmission lines, and magnetoelectric sensors. [0003] As early as 1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/10C04B35/26
Inventor 韩高荣王永刚徐刚杨琳琳翁文剑杜丕一赵高凌张溪文沈鸽
Owner ZHEJIANG UNIV
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