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bfo-refeo 3 -pzt multiferroic solid solution and preparation method thereof

A solid solution and multiferroic technology, applied in the field of BFO-ReFeO3-PZT multiferroic solid solution and its preparation, to achieve the effects of high remanent magnetization, high electromechanical coupling characteristics, and high remanent polarization

Active Publication Date: 2022-05-20
JIANGXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is currently a lack of preparation methods to dissolve ReFeO3 and PZT in BFO to significantly improve the magnetic and electromechanical coupling characteristics of BFO, and produce strong magnetodielectric effects

Method used

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  • bfo-refeo <sub>3</sub> -pzt multiferroic solid solution and preparation method thereof
  • bfo-refeo <sub>3</sub> -pzt multiferroic solid solution and preparation method thereof
  • bfo-refeo <sub>3</sub> -pzt multiferroic solid solution and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0040] The steps of the preparation method are as follows:

[0041] Step 1, according to the chemical formula BiFeO 3 The mass ratio of Bi 2 o 3 and Fe 2 O, the Bi to be weighed 2 o 3 and Fe 2 BiFeO was prepared after ball milling, drying, sieving, pre-calcination, ball milling, drying and sieving. 3 powder;

[0042] Step 2, according to the chemical formula ReFeO 3 The mass ratio of Re 2 o 3 and Fe 2 o 3 , will weigh the Re 2 o 3 and Fe 2 o 3 After one ball milling, one drying, one sieving, pre-calcination, two ball milling, two drying and two sieving, ReFeO was prepared. 3 powder;

[0043] Step 3, according to the chemical formula Pb(Zr 0.52 Ti 0.48 )FeO 3 The mass ratio of PbO, ZrO 2 and TiO 2 , the weighed PbO, ZrO 2 and TiO 2 Pb(Zr 0.52 Ti 0.48 )FeO 3 powder;

[0044] Step 4, according to the chemical formula 0.5BiFeO 3 -0.2ReFeO 3 -0.3Pb(Zr 0.52 Ti 0.48 )FeO 3The stoichiometric ratios were weighed for the BiFeO 3 Powder, ReFeO 3 powder ...

Embodiment 1

[0047] According to the chemical formula BiFeO 3 The mass ratio of Bi was weighed separately 2 o 3 and Fe 2 O, at Bi 2 o 3 and Fe 2 Add 100ml of absolute ethanol to O to carry out ball milling and mixing, and the time of one ball milling is 6h; take out the slurry after ball milling and keep it in an oven for 6h at 90°C; sieve after drying, and the particle size of one sieve is 80 mesh; The sieved powder is put into an alumina crucible, and pre-fired at a temperature of 750°C for 2 hours in an air atmosphere to generate BiFeO 3 The pre-fired powder; the pre-fired BiFeO 3 The powder is again added with absolute ethanol for secondary ball milling, and the time for the secondary ball milling is 6 hours. The slurry from the secondary ball milling was kept at 90° C. for 1.5 hours, and then sieved for the second time. The particle size of the second sieve was 120 mesh.

[0048] In this embodiment, Re is La rare earth element, according to the chemical formula LaFeO 3 The ma...

Embodiment 2

[0055] According to the chemical formula BiFeO 3 The mass ratio of Bi was weighed separately 2 o 3 and Fe 2 O, at Bi 2 o 3 and Fe 2 Add 100ml of absolute ethanol to O to carry out ball milling and mixing, and the time of one ball milling is 7h; take out the slurry after ball milling and keep it in an oven for 7h at 100°C; sieve after drying, and the particle size of one sieve is 100 mesh; Put the sieved powder into an alumina crucible, and pre-fire it at 800°C for 2.5 hours in an air atmosphere to generate BiFeO 3 The pre-fired powder; the pre-fired BiFeO 3 Add absolute ethanol to the powder again for secondary ball milling, and the time for the secondary ball milling is 7 hours. The slurry from the secondary ball milling was kept at 100° C. for 2 hours, and then sieved for the second time. The particle size of the second sieve was 150 mesh.

[0056] In this embodiment, Re is Y rare earth element, according to the chemical formula YFeO 3 The mass ratio of Y 2 o 3 an...

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Abstract

The invention relates to the technical field of multiferroic solid solution preparation and provides a BFO-ReFeO 3 ‑PZT multiferroic solid solution and preparation method thereof, the chemical composition of the multiferroic solid solution is expressed as 0.5BiFeO 3 ‑0.2ReFeO 3 -0.3Pb(Zr 0.52 Ti 0.48 )FeO 3 . The preparation method includes the preparation of BiFeO 3 powder; preparation of ReFeO 3 powder; preparation of Pb(Zr 0.52 Ti 0.48 )FeO 3 Powder; the above three powders are mixed through ball milling, drying, sieving, granulation, billet making and sintering to obtain BFO‑ReFeO 3 ‑PZT multiferroic solid solution. The BFO‑ReFeO 3 ‑PZT multiferroic solid solution has high remanent polarization, remanent magnetization and strong magnetodielectric effect, and its remanent polarization range is greater than or equal to 0.9μC / cm 2 Less than or equal to 2.5μC / cm 2 And the range of its residual magnetization is greater than or equal to 0.025emu / g and less than or equal to 0.21emu / g, and the maximum magnetic permittivity can be 16.1%.

Description

technical field [0001] The present invention relates to the technical field of multiferroic solid solution, especially provides a kind of BFO-ReFeO 3 - PZT multiferroic solid solution and preparation method thereof. Background technique [0002] The phenomenon that the dielectric properties of materials change as the magnetic field changes is called the "magnetodielectric effect." Materials with this effect have potential applications in resonant capacitors and capacitive read heads for data storage. A large magnetodielectric effect means that a large change in permittivity or capacitance can be obtained with a small magnetic field. Because there is a certain correlation between the magnetoelectric effect and magnetodielectric effect of materials, materials with strong magnetoelectric effect may exhibit large magnetodielectric effect. On the other hand, multiferroic materials usually exhibit strong magnetoelectric effects. Therefore, it is possible to find large magnetodi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/453C04B35/622C04B35/626C04B35/638
CPCC04B35/453C04B35/622C04B35/62605C04B35/638C04B2235/3244C04B2235/3232C04B2235/3296C04B2235/3272C04B2235/3262C04B2235/661C04B2235/6562C04B2235/6567
Inventor 薛飞田娅晖
Owner JIANGXI UNIV OF TECH
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