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Ferrotitanium bismuth cobaltate ceramic material having layered structure and preparation method thereof

A technology of ceramic material and layered structure, which is applied in the field of layered structure titanium iron cobalt bismuth ceramic material and its preparation, can solve problems such as the inability to meet practical application, and achieve the effect of improving ferroelectricity and ferromagnetism

Inactive Publication Date: 2013-02-27
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the three-layer ferroelectric material Bi 4 Ti 3 o 12 with three BiFeO 3 The combination still exhibits localized antiferromagnetism, which cannot meet the needs of practical applications, so other methods must be used to change the magnetic ion coupling to improve ferromagnetism.

Method used

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  • Ferrotitanium bismuth cobaltate ceramic material having layered structure and preparation method thereof
  • Ferrotitanium bismuth cobaltate ceramic material having layered structure and preparation method thereof
  • Ferrotitanium bismuth cobaltate ceramic material having layered structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The purity is 98% n-butyl titanate (C 16 h 36 o 4 Ti) 7.1475g, with a purity of 99% bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) 24.0110g, with a purity of 98.5% iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) 7.1062g, with a purity of 99.5% cobalt nitrate hexahydrate (Co(NO 3 ) 3 ·6H 2 O) 1.0354g was dissolved in nitric acid solution, 18.6157g of ethylenediaminetetraacetic acid (EDTA) with a purity of 98% and 19.1227g of citric acid with a purity of 98% were added as complexing agents, and a mixed solution was obtained after stirring. Put the mixed solution in a crucible and evaporate to dryness until burned to obtain a powder, and pre-burn the obtained powder in a muffle furnace at 750°C for 2 hours to remove organic matter to obtain a precursor; A cylindrical sample with a size of Φ12mm×2mm was made, and it was sintered in a muffle furnace at 880°C for 5 hours to obtain a ceramic material, which was Bi 7 Fe 2.5 co 0.5 Ti 3 o 21 .

[0048] Be that ...

Embodiment 2

[0053] The purity is 98% n-butyl titanate (C 16 h 36 o 4 Ti) 7.1475g, with a purity of 99% bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) 24.0110g, with a purity of 98.5% iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) 5.6849g, with a purity of 99.5% cobalt nitrate hexahydrate (Co(NO 3 ) 3 ·6H 2 O) 2.0684g was dissolved in nitric acid solution, 18.6157g of ethylenediaminetetraacetic acid (EDTA) with a purity of 98% and 19.1227g of citric acid with a purity of 98% were added as complexing agents, and a mixed solution was obtained after stirring. Put the mixed solution in a crucible and evaporate to dryness until burned to obtain a powder, and pre-burn the obtained powder in a muffle furnace at 750°C for 2 hours to remove organic matter to obtain a precursor; A cylindrical sample with a size of Φ12mm×2mm was made, and it was sintered in a muffle furnace at 880°C for 5 hours to obtain a ceramic material, which was Bi 7 Fe 2 co 1 Ti 3 o 21 .

[0054] Be that the ...

Embodiment 3

[0059] The purity is 98% n-butyl titanate (C 16 h 36 o 4 Ti) 7.1475g, with a purity of 99% bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) 24.0110g, with a purity of 98.5% iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) 4.2637g, with a purity of 99.5% cobalt nitrate hexahydrate (Co(NO 3 ) 3 ·6H 2 O) 3.1026g was dissolved in nitric acid solution, 18.6157g of ethylenediaminetetraacetic acid (EDTA) with a purity of 98% and 19.1227g of citric acid with a purity of 98% were added as complexing agents, and a mixed solution was obtained after stirring. Put the mixed solution in a crucible and evaporate to dryness until burned to obtain a powder, and pre-burn the obtained powder in a muffle furnace at 750°C for 2 hours to remove organic matter to obtain a precursor; A cylindrical sample with a size of Φ12mm×2mm was made, and it was sintered in a muffle furnace at 880°C for 5 hours to obtain a ceramic material, which was Bi 7 Fe 1.5 co 1.5 Ti 3 o 21 .

[0060] Structur...

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Abstract

The present invention provides a ferrotitanium bismuth cobaltate ceramic material having a layered structure. A part of iron ions are replaced by cobalt ions to obtain Bi7Fe3-xCoxTi3O21 layered Aurivillius type multi-iron oxide ceramic, and the structure thereof includes two bismuth oxide layers ((Bi2O2)2+) and titanium oxide (Ti-O) octahedrons, iron oxide (Fe-O) octahedrons and cobalt oxide (Co-O) octahedrons sandwiched between the bismuth oxide layers, wherein because iron atoms and cobalt atoms are similar in structure, after part of the cobalt ions replace part of iron ions, the Fe-O octahedrons and Co-O octahedrons are ranked relatively in order, the Fe-O-Co coupling can be formed locally, and ferroelectric and ferromagnetic of the ceramic material are enhanced. The present invention also provides a preparation method of the ferrotitanium bismuth cobaltate ceramic material having the layered structure. The preparation temperature of the ceramic material is much lower than the preparation temperature of the prior art, the energy consumption is reduced, and the industrialization production is facilitated.

Description

technical field [0001] The invention relates to the technical field of oxide ceramic materials, in particular to a layered bismuth titanium iron cobaltate ceramic material and a preparation method thereof. Background technique [0002] The basic properties of iron include ferroelectricity / antiferroelectricity, ferromagnetism / antiferromagnetism / ferrimagnetism and ferroelasticity. Multiferroic materials refer to materials that contain two or more basic properties of iron in the same phase. In multiferroic materials, different iron properties can produce some new properties, such as magnetoelectric effect, magnetic dielectric effect, etc. It is because of these effects that multiferroic materials have potential application prospects and can be widely used in switching Devices, sensors, capacitors and storage devices, etc. [0003] The magnetoelectric effect is an important application of multiferroic materials. The magnetoelectric effect refers to the coupling effect between...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/475
Inventor 陆亚林凌意翰孙书杰彭冉冉雷志威陈小兵
Owner UNIV OF SCI & TECH OF CHINA
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