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Six-layer ferrotitanium yttrium bismuth cobaltate ceramic material with multiferroic performance and preparation method thereof

A technology of yttrium bismuth titanic iron cobaltate and layered structure, which is applied in the field of six-layer structure yttrium bismuth titanic iron cobaltate ceramic material and its preparation, can solve the problem that it is difficult to achieve the order of B-site ions in samples. Achieve the effects of reducing leakage current, good ferroelectricity and ferromagnetism, and simple process

Inactive Publication Date: 2013-09-11
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the study, it was found that two kinds of d 0 Coupling the magnetic ions of the electronic structure can greatly improve the ferromagnetic properties of the sample, but there are still two main problems in the research of double perovskite materials: (1) The sample synthesis must be prepared under high pressure, and it is difficult to make the sample The B-site ions have good order; (2) The phase transition temperatures of the ferroelectric and ferromagnetic samples are different and above room temperature

Method used

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  • Six-layer ferrotitanium yttrium bismuth cobaltate ceramic material with multiferroic performance and preparation method thereof
  • Six-layer ferrotitanium yttrium bismuth cobaltate ceramic material with multiferroic performance and preparation method thereof
  • Six-layer ferrotitanium yttrium bismuth cobaltate ceramic material with multiferroic performance and preparation method thereof

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Effect test

Embodiment 1

[0017] Select chemically pure n-butyl titanate (C 16 h 36 o 4 Ti), analytically pure bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O), high-purity (4N) yttrium nitrate hexahydrate (Y(NO 3 ) 3 ·6H 2 O), analytically pure ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O), analytically pure cobalt acetate tetrahydrate (C 4 h 6 o 4 Co 4H 2 O) as raw material, according to the stoichiometric ratio of 3:6:1:2:1 accurately weighed and dissolved in nitric acid solution, adding ethylenediaminetetraacetic acid (EDTA) and citric acid as complexing agent, EDTA, citric acid and metal The molar ratio of ions is 0.7:1:1, and the mixture is stirred at a uniform speed to form a clear solution.

[0018] Table 1 Preparation of Bi 6 YF 2 CoTi 3 o 21

[0019] Drug Name

molecular weight

Drug purity

Weighing mass / g

C 16 h 36 o 4 Ti

340.36

98％

7.893

Bi(NO 3 ) 3 ·5H 2 o

485.07

99％

22.4977

Y(NO...

Embodiment 2

[0028] Select chemically pure n-butyl titanate (C 16 h 36 o 4 Ti), analytically pure bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O), high-purity (4N) yttrium nitrate hexahydrate (Y(NO 3 ) 3 ·6H 2 O), analytically pure ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O), analytically pure cobalt acetate tetrahydrate (C 4 h 6 o 4 Co 4H 2 O) as raw material, according to the stoichiometric ratio of 3:6:1:2:1 accurately weighed and dissolved in nitric acid solution, adding ethylenediaminetetraacetic acid (EDTA) and citric acid as complexing agent, EDTA, citric acid and metal The molar ratio of ions is 0.7:1:1, and the mixture is stirred at a uniform speed to form a clear solution.

[0029] Table 2 Preparation of Bi 6 YF 2 CoTi 3 o 21

[0030] Drug Name

molecular weight

Drug purity

Weighing mass / g

[0031] C 16 h 36 o 4 Ti

340.36

98％

8.016

Bi(NO 3 ) 3 ·5H 2 o

485.07

99％

...

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Abstract

The invention relates to a six-layer ferrotitanium yttrium bismuth cobaltate ceramic material with multiferroic performance and a preparation method thereof. The Aurivillius-type oxide ceramic with a chemical formula Bi6YFe2CoTi3O21 has good ferroelectricity and ferromagnetism over room temperature. A Bi6YFe2CoTi3O21 sample is prepared by an improved Pechini method, and the Fe-O and Co-O octahedrons are orderly arranged relatively so as to locally obtain coupling between Fe-O-Co and Y-O-Co / Fe to improve the ferroelectric and magnetic performance of the sample. The technology is simple, reasonable and efficient, the sample preparation temperature is far lower than the preparation temperature of the prior art, and the technology is environment-friendly and very convenient for industrial production.

Description

technical field [0001] The invention relates to the field of multiferroic oxide ceramic materials, and more specifically relates to a six-layer structure yttrium bismuth titanate cobaltate ceramic material with multiferroic properties and a preparation method thereof. Background technique [0002] Magnetoelectric multiferroic materials refer to materials that exhibit ferroelectric order and ferromagnetic / antiferromagnetic order at the same time in a certain temperature range, and there is a certain coupling between them. Recently, this material has attracted more and more attention. On the one hand, it can not only be used in the research and development of ferroelectric and magnetic devices, but more importantly, it can use the coupling between magnetoelectricity to provide additional advantages for the design and application of devices. One degree of freedom, thus showing extremely attractive application prospects in emerging spintronics, multi-state information storage, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/453C04B35/622
Inventor 陆亚林彭冉冉陈小兵黄妍凌意瀚孙书杰刘敏
Owner UNIV OF SCI & TECH OF CHINA
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