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Bismuth ferrite doped single-phase multiferroic material and preparation method thereof

A multiferroic, bismuth ferrite technology, applied in chemical instruments and methods, iron compounds, inorganic chemistry, etc., can solve the problem of magnetoelectric coupling performance that no one cares about, and achieve the effect of improving ferromagnetism and ferroelectricity

Inactive Publication Date: 2016-11-09
苏州市奎克力电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are many articles pointing out that BiFeO 3 A-site doping in can suppress BiFeO 3 The helical magnetic structure in BiFeO, which enhances its ferromagnetism, 3 The B-site doping in can reduce the BiFeO 3 The leakage current improves its ferroelectric performance, but its magnetoelectric coupling performance has not been paid attention to so far.

Method used

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preparation example Construction

[0024] The present invention also provides a method for preparing the above-mentioned doped bismuth ferrite single-phase multiferroic material, comprising the following steps:

[0025] (1) Bi(NO 3 ) 3 • 5H 2 O, Ba(NO 3 ) 2 • 5H 2 O, Fe(NO 3 ) 3 •9H 2 O and MnO 2 Weigh and dissolve in deionized water according to the molar ratio of 0.79~0.89:0.25~0.15:0.95:0.05, and stir;

[0026] (2) Tartaric acid (C 6 h 8 o 7 •H 2 O) Add it to the mixed solution in a ratio of 1:1 to the metal cation, and continue to stir, and the solution is milky yellow at this time;

[0027] (3) Add HNO dropwise to the mixed solution 3 solution until the mixed solution turns from milky yellow to tea and then to orange;

[0028] (4) Heat the mixed solution, stir while heating, and keep the heating temperature at about 150°C. As the liquid evaporates, the color of the solution becomes darker, gradually changing from orange to brown, and when most of the liquid evaporates, a sticky brown pasty ...

Embodiment 1

[0034] The preparation chemical composition is Bi 1.04-x Ba x Fe 0.95 mn 0.05 o 3 doped bismuth ferrite single-phase multiferroic material, where x=0.15, and its molecular formula is Bi 0.89 Ba 0.15 Fe 0.95 mn 0.05 o 3 . First, weigh the preparation raw materials: 0.0089mol Bi(NO 3 ) 3 • 5H 2 O, 0.0015molBa(NO 3 ) 2 • 5H 2O, 0.0095mol Fe(NO 3 ) 3 •9H 2 O, 0.00005molMnO 2 and 0.0204mol tartaric acid, the above are all analytically pure raw materials.

[0035] Concrete preparation process is as follows:

[0036] (1) 0.0089mol Bi(NO 3 ) 3 • 5H 2 O, 0.0015molBa(NO 3 ) 2 • 5H 2 O, 0.095mol Fe(NO 3 ) 3 •9H 2 O and 0.00005mol MnO 2 Dissolve in a beaker with 40ml deionized water, and stir the solution with a magnetic stirrer. At this time, the nitrates of iron, bismuth and barium will not completely dissolve in the dilute nitric acid solution, because Bi(NO 3 ) 3 • 5H 2 O and Ba(NO 3 ) 2 • 5H 2 O is insoluble in water;

[0037] (2) Add 0.0204mol ta...

Embodiment 2

[0044] The preparation chemical composition is Bi 1.04-x Ba x Fe 0.95 mn 0.05 o 3 Doped bismuth ferrite single-phase multiferroic material, where, x=0.2, its molecular formula is Bi 0.89 Ba 0.15 Fe 0.95 mn 0.05 o 3 . Firstly weigh the preparation raw material: 0.0084mol Bi(NO 3 ) 3 • 5H 2 O, 0.002molBa(NO 3 ) 2 • 5H 2 O, 0.0095mol Fe(NO 3 ) 3 •9H 2 O, 0.00005molMnO 2 and 0.0204mol tartaric acid, the above raw materials are all analytically pure.

[0045] Concrete preparation process is as follows:

[0046] (1) 0.0084mol Bi(NO 3 ) 3 • 5H 2 O, 0.0095mol Fe(NO 3 ) 3 •9H 2 O, 0.002molBa(NO 3 )2•5H 2 O and 0.00005molMnO 2 Dissolve in a beaker with 40ml deionized water, and stir the solution with a magnetic stirrer. At this time, the nitrates of iron, bismuth and barium will not completely dissolve in the dilute nitric acid solution, because Bi(NO 3 ) 3 • 5H 2 O and Ba(NO 3 ) 2 • 5H 2 O is insoluble in water;

[0047] (2) Add 0.0204mol tartaric a...

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Abstract

The present invention relates to a bismuth ferrite doped single-phase multiferroic material with the chemical composition of Bi1.04-xBaxFe0.95Mn0.05O3, wherein x satisfies the relation of 0.15<= x<= 0.25, and the lattice structure is coexistence of trilateral phase and tetragonal phase. By barium doping at site A and Mn doping at site B, and control of doping amount of the barium element, a crystal lattice structure with the coexistence of trilateral phase and tetragonal phase is realized; the structure not only can significantly improve the ferromagnetism and ferroelectricity of the bismuth ferrite bulk, but also is observed with obvious magnetoelectric coupling phenomenon, wherein the magnetoelectric coefficient alpha of mu0delta M / delta E is 1.8*10<-12> s / m, so as to realize electromagnetic control, and provide unlimited possibilities for the multi-functionalization and miniaturization of future electronic components.

Description

technical field [0001] The invention relates to a single-phase multiferroic material, more specifically, the invention relates to a single-phase multiferroic material doped with bismuth ferrite and a preparation method thereof. Background technique [0002] Schmid of the University of Geneva called materials with two or more basic ferrotypes (such as ferromagnetism, ferroelectricity and ferroelasticity) as multiferroics. Multiferroic materials not only possess ferromagnetism and ferroelectricity at the same time, but also can produce a special property—magnetoelectric effects (ME) through the interaction of ferroelectricity and magnetism. [0003] The magnetoelectric coupling effect determines that multiferroic materials can directly convert a magnetic field into an electric field, and can also directly convert an electric field into a magnetic field, and the electric polarization and magnetic moment can be regulated mutually. Based on this property of multiferroic material...

Claims

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Application Information

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IPC IPC(8): C01G49/00
CPCC01G49/0072C01P2002/72C01P2006/42
Inventor 蔡小连
Owner 苏州市奎克力电子科技有限公司
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