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Bi2Fe4O9-MgFe2O4 composite ceramic and preparation method thereof

A technology of bi2fe4o9-mgfe2o4, bi2fe4o9-xmgfe2o9, which is applied in the field of information functional material preparation, can solve the problems such as no records

Inactive Publication Date: 2019-08-02
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, compared to 2 Fe 4 o 9 with MgFe 2 o 4 The preparation of composite solid solution ceramics is not recorded in domestic and foreign literature

Method used

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  • Bi2Fe4O9-MgFe2O4 composite ceramic and preparation method thereof
  • Bi2Fe4O9-MgFe2O4 composite ceramic and preparation method thereof
  • Bi2Fe4O9-MgFe2O4 composite ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A Bi 2 Fe 4 o 9 -MgFe 2 o 4 Composite ceramics, the chemical composition of the composite ceramics is expressed as: (1-x) Bi 2 Fe 4 o 9 -xMgFe 2 o 9 , (x=0.1), the composite ceramic is made by the following method:

[0026] 1) Weigh 0.081mol of citric acid monohydrate at room temperature and pour it into a beaker with a volume of 100ml, then add 30mL of deionized water, stir to obtain a transparent citric acid aqueous solution, and then weigh 0.036mol of Fe(NO 3 ) 3 9H 2 O and 0.018mol Bi(NO 3 ) 3 ·5H 2 O, was dissolved in aqueous citric acid solution under constant stirring to obtain transparent Bi 2 Fe 4 o 9 solution;

[0027]2) Weigh 0.0045mol of citric acid monohydrate at room temperature and pour it into a beaker with a volume of 100ml, then add 30mL of deionized water, stir to obtain a transparent citric acid aqueous solution, and then weigh 0.002mol of Fe(NO 3 ) 3 9H 2 O and 0.001mol MgCO 3 , was added to aqueous citric acid solution under c...

Embodiment 2

[0031] A Bi 2 Fe 4 o 9 -MgFe 2 o 4 Composite ceramics, the chemical composition of the composite ceramics is expressed as: (1-x) Bi 2 Fe 4 o 9 -xMgFe 2 o 9 , (x=0.2); The composite ceramic is made by the following method:

[0032] 1) Weigh 0.072mol of citric acid monohydrate at room temperature and pour it into a beaker with a volume of 100ml, then add 30mL of deionized water, stir to obtain a transparent citric acid aqueous solution, and then weigh 0.032mol of Fe(NO 3 ) 3 9H 2 O and 0.016mol Bi(NO 3 ) 3 ·5H 2 O, was dissolved in aqueous citric acid solution under constant stirring to obtain transparent Bi 2 Fe 4 o 9 solution;

[0033] 2) Weigh 0.009mol of citric acid monohydrate at room temperature and pour it into a beaker with a volume of 100ml, then add 30mL of deionized water, stir to obtain a transparent citric acid aqueous solution, and then weigh 0.004mol of Fe(NO 3 ) 3 9H 2 O and 0.002mol MgCO 3 , and added to the aqueous citric acid solution und...

Embodiment 3

[0036] A Bi 2 Fe 4 o 9 -MgFe 2 o 4 Composite ceramics, the chemical composition of the composite ceramics is expressed as: (1-x) Bi 2 Fe 4 o 9 -xMgFe 2 o 9 , (x=0.3); This composite ceramic is made by the following method:

[0037] 1) Weigh 0.063mol of citric acid monohydrate at room temperature and pour it into a beaker with a volume of 100ml, then add 30mL of deionized water, stir to obtain a transparent citric acid aqueous solution, and then weigh 0.028mol of Fe(NO 3 ) 3 9H 2 O and 0.014mol Bi(NO 3 ) 3 ·5H 2 O, was dissolved in aqueous citric acid solution under constant stirring to obtain transparent Bi 2 Fe 4 o 9 solution;

[0038] 2) Weigh 0.0135mol of citric acid monohydrate at room temperature and pour it into a beaker with a volume of 100ml, then add 30mL of deionized water, stir to obtain a transparent citric acid aqueous solution, and then weigh 0.006mol of Fe(NO 3 ) 3 9H 2 O and 0.003molMgCO 3 , and added to the aqueous citric acid solution un...

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Abstract

The invention discloses Bi2Fe4O9-MgFe2O4 composite ceramic and a preparation method thereof. The composite ceramic has the chemical composition expression as follows: (1-x)Bi2Fe4O(9-x)MgFe2O9, whereinx is larger than or equal to 0.1 and smaller than or equal to 0.5. The composite ceramic is prepared with the method as follows: 1) preparing a Bi2Fe4O9 solution; 2) preparing a MgFe2O4 solution; 3)preparing black xerogel; 4) preparing the Bi2Fe4O9-MgFe2O4 composite ceramic. The composite ceramic has a pure phase structure, and the magnetism and the dielectric constant are easy to control. The method is simple to operate, short in cycle, low in cost, environmentally friendly and non-toxic and does not require a reduction atmosphere.

Description

technical field [0001] The invention relates to the technical field of preparation of information functional materials, specifically a Bi 2 Fe 4 o 9 -MgFe 2 o 4 Composite ceramics and methods for their preparation. Background technique [0002] The various ferroic orders of multiferroic materials and the coupling effects between them make multiferroic materials the first choice in the current research field of quantum functional materials. Among them, multiferroic magnetoelectric materials with electric polarization and magnetization have attracted much attention, because the coexistence of ferroelectric and ferromagnetic ordered phases and the magnetoelectric coupling effect between them can make it possible to change the electric field to control the magnetism or change the magnetic field. It is possible to control electricity. Classified from the composition of multiferroic magnetoelectric materials, there are two types of single-phase and composite magnetoelectric ...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
CPCC04B35/2683C04B35/622C04B2235/3206C04B2235/3298
Inventor 余贵波朱长明王丽光孔文婕刘富池吕凤珍
Owner GUANGXI NORMAL UNIV
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