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Bismuth titanate multiferroic ceramic material with aurivillius phase structure doped with y element and preparation method thereof

A technology of element doping and bismuth titanate, which is applied in the field of physics and devices, and multiferroic materials, can solve problems such as weak magnetism

Active Publication Date: 2021-09-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But BiFeO 3 The magnetism of Bi is relatively weak, while Bi 4 Ti 3 o 12 There is basically no magnetism, so to make Bi 5 Ti 3 FeO 15 To be better applied in practice, it is necessary to improve and enhance its ferromagnetic properties

Method used

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  • Bismuth titanate multiferroic ceramic material with aurivillius phase structure doped with y element and preparation method thereof
  • Bismuth titanate multiferroic ceramic material with aurivillius phase structure doped with y element and preparation method thereof
  • Bismuth titanate multiferroic ceramic material with aurivillius phase structure doped with y element and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Formulation and weighing: bismuth oxide (Bi oxide) with an analytical purity greater than 99% 2 o 3 ), yttrium oxide (Y 2 o 3 ), iron oxide (Fe 2 o 3 ) and titanium oxide (TiO 2 ) as the raw material, according to the stoichiometric ratio of 4.9:0.1:1:6, use the analytical balance to weigh the mass of the powder respectively.

[0037] Table 1 Preparation of Bi 4.9 Y 0.1 Ti 3 FeO 15

[0038]

[0039] (2) Ball milling: Pour the weighed sample into a ball mill jar, add absolute ethanol (C2H5OH) to mix powder and ball stones. Ball milled on a ball mill for 12 hours.

[0040] (3) Drying and sampling: pour the ball-milled samples into trays and put them in an oven for drying. The reason for adding absolute ethanol instead of deionized water in the ball mill is that industrial ethanol evaporates quickly during drying and organic solvents will not react with inorganic salts.

[0041] (4) Pre-burning: Grind the dried sample powder, press it into a block with ...

Embodiment 2

[0047] (1) Formulation and weighing: bismuth oxide (Bi oxide) with an analytical purity greater than 99% 2 o 3 ), yttrium oxide (Y 2 o 3 ), iron oxide (Fe 2 o 3 ) and titanium oxide (TiO 2 ) as the raw material, according to the stoichiometric ratio of 4.7:0.3:1:6, use the analytical balance to weigh the mass of the powder respectively.

[0048] Table 2 Preparation of Bi 4.7 Y 0.3 Ti 3 FeO 15

[0049]

[0050] (2) Ball milling: Pour the weighed sample into a ball mill jar, add absolute ethanol (C2H5OH) to mix powder and ball stones. Ball milled on a ball mill for 12 hours.

[0051] (3) Drying and sampling: pour the ball-milled samples into trays and put them in an oven for drying. The reason for adding absolute ethanol instead of deionized water in the ball mill is that industrial ethanol evaporates quickly during drying and organic solvents will not react with inorganic salts.

[0052] (4) Pre-burning: Grind the dried sample powder, press it into a block with ...

Embodiment 3

[0058] (1) Formula and weighing materials: Bismuth oxide (Bi2O3), yttrium oxide (Y2O3), iron oxide (Fe2O3) and titanium oxide (TiO2) with an analytical purity greater than 99% are used as raw materials, according to the stoichiometric ratio of 4.5:0.5:1 : 6 Use an analytical balance to weigh the powder mass respectively.

[0059] Table 3 Preparation of Bi 4.5 Y 0.5 Ti 3 FeO 15

[0060]

[0061] (2) Ball milling: Pour the weighed sample into a ball mill jar, add absolute ethanol (C2H5OH) to mix powder and ball stones. Ball milled on a ball mill for 12 hours.

[0062] (3) Drying and sampling: pour the ball-milled samples into trays and put them in an oven for drying. The reason for adding absolute ethanol instead of deionized water in the ball mill is that industrial ethanol evaporates quickly during drying and organic solvents will not react with inorganic salts.

[0063] (4) Pre-burning: Grind the dried sample powder, press it into a block with a mold, put the presse...

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Abstract

The invention discloses a bismuth titanate ceramic material doped with Y element in Aurivillius phase structure. The material is a sandwich structure in which a 4-layer perovskite structure is sandwiched in a two-layer fluorite-like structure, and its chemical formula is Bi 5‑x Y x Ti 3 FeO 15 (abbreviated as BYTF). Its structure The present invention also discloses the preparation method of the bismuth titanate ferrite ceramic material with the Aurivillius phase structure doped with Y element. The invention adjusts the magnetic order of the BYTF multiferroic material through A-site doping, realizes the coexistence of ferroelectricity and ferromagnetism, and has good magnetodielectric effect. The invention has the advantages of simple operation, low cost and good repeatability, can realize large-scale production, and has great application potential in the field of magnetoelectric material research.

Description

technical field [0001] The invention relates to the technical fields of multiferroic materials, physics and devices, in particular to a bismuth ferro-titanate ceramic material with a Y element-doped Aurivillius phase structure and a preparation method thereof, and the influence of doping on the physical properties of the system. Background technique [0002] Materials that possess both ferroelectricity and ferromagnetism are called multiferroic materials. , means that the material contains two or more iron properties, including: ferroelectricity (antiferroelectricity), ferromagnetism (antiferromagnetism, [0003] Ferrimagnetism), ferroelasticity, etc. Currently, the definition of multiferroicity has been expanded to include long-range magnetic order, spontaneous generation [0004] materials including polarization. Among them, materials with both ferromagnetic and ferroelectric properties, due to their magnetic [0005] Electric coupling effect, which can produce magneti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/453C04B35/622
CPCC04B35/453C04B35/622C04B2235/3225C04B2235/3232C04B2235/3272
Inventor 蒲永平李经纬郭旭史瑞科王雯杨梦蝶师裕
Owner SHAANXI UNIV OF SCI & TECH