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A kind of europium, zirconium co-doped bismuth ferrite multiferroic ceramic and preparation method thereof

A technology of multiferroic ceramics and bismuth ferrite, applied in the direction of magnetic objects, magnetic materials, electrical components, etc., to achieve the effects of compact microstructure, easy control of process conditions, and stable crystal quality

Active Publication Date: 2020-07-28
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, A-B site co-doping is currently in the stage of exploration and research, which is a research hotspot and difficulty in this field.

Method used

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  • A kind of europium, zirconium co-doped bismuth ferrite multiferroic ceramic and preparation method thereof
  • A kind of europium, zirconium co-doped bismuth ferrite multiferroic ceramic and preparation method thereof
  • A kind of europium, zirconium co-doped bismuth ferrite multiferroic ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] According to the stoichiometric ratio composition as Bi 0.95 Eu 0.05 Fe 0.95 Zr 0.05 o 3 (x=0.05) weigh Bi 2 o 3 、Eu 2 o 3 , Fe 2 o 3 and ZrO 2 Carry out batching and mixing, add anhydrous ethanol that just submerges all the ingredients as a medium, grind the ingredients in an agate mortar for 6 hours; bake the ground powder in an oven at 120°C for 12 hours, and dry the dried powder Grind in a mortar for 30 minutes and pre-fire at 700°C for 2 hours; the pre-fired powder is ground again for 2 hours and then pressed into a disc with a diameter of 11mm and a thickness of 1.5mm under a pressure of 10MPa; heat the sintering furnace to 860°C Finally, put the disc sample into a place 1 / 6 of the length of the furnace tube from the furnace tube mouth and keep it warm for 20 minutes, then push the disc sample to a place 1 / 3 of the furnace tube length from the furnace tube mouth and keep it warm for 10 min, and finally put the disc sample in Sintered at the center of th...

Embodiment 2

[0038] According to the stoichiometric ratio composition as Bi 0.9 Eu 0.1 Fe 0.9 Zr 0.1 o 3 (x=0.1) weigh Bi 2 o 3 、Eu 2 o 3 , Fe 2 o 3 and ZrO 2 Carry out batching and mixing, add anhydrous ethanol that just submerges all the ingredients as a medium, grind the ingredients in an agate mortar for 6 hours; bake the ground powder in an oven at 120°C for 12 hours, and dry the dried powder Grind in a mortar for 30 minutes and pre-fire at 700°C for 2 hours; the pre-fired powder is ground again for 2 hours and then pressed into a disc with a diameter of 11mm and a thickness of 1.5mm under a pressure of 10MPa; heat the sintering furnace to 860°C Finally, put the disc sample into a place 1 / 6 of the length of the furnace tube from the furnace tube mouth and keep it warm for 20 minutes, then push the disc sample to a place 1 / 3 of the furnace tube length from the furnace tube mouth and keep it warm for 10 min, and finally put the disc sample in Sintered at the center of the fur...

Embodiment 3

[0040] According to the stoichiometric ratio composition as Bi 0.85 Eu 0.15 Fe 0.85 Zr 0.15 o 3 (x=0.15) weigh Bi 2 o 3 、Eu 2 o 3 , Fe 2 o 3 and ZrO 2 Carry out batching and mixing, add anhydrous ethanol that just submerges all the ingredients as a medium, grind the ingredients in an agate mortar for 6 hours; bake the ground powder in an oven at 120°C for 12 hours, and dry the dried powder Grind in a mortar for 30 minutes and pre-fire at 700°C for 2 hours; the pre-fired powder is ground again for 2 hours and then pressed into a disc with a diameter of 11mm and a thickness of 1.5mm under a pressure of 10MPa; heat the sintering furnace to 870°C Finally, put the disc sample into a place 1 / 6 of the length of the furnace tube from the furnace tube mouth and keep it warm for 20 minutes, then push the disc sample to a place 1 / 3 of the furnace tube length from the furnace tube mouth and keep it warm for 10 min, and finally put the disc sample in Sintered at the center of th...

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Abstract

The invention relates to europium-zirconium-codoped bismuth ferrite multiferroic ceramics. The europium-zirconium-codoped bismuth ferrite multiferroic ceramics have the chemical molecular formula of Bi<1-x>EuxFe<1-x>ZrxO3, wherein the doped amount x is greater than 0 and is not greater than 0.15. The europium-zirconium-codoped bismuth ferrite multiferroic ceramics can be obtained through carrying out material preparing according to a chemical element mole rate of Bi<1-x>EuxFe<1-x>ZrxO3, and then, carrying out an improved solid reaction process. According to the ceramics, through doping europium and zirconium, the content of oxygen vacancies, Fe<2+> and impurity phases can be effectively lowered, and the anti-parallel arrangement of adjacent Fe<3+> is broken through; and meanwhile, a space-modulated spiral spin magnetic structure can be destroyed through structural distortion, so that the leakage current characteristics, dielectric properties, ferroelectric properties and magnetic properties of bismuth ferrite materials can be improved remarkably, and thus, the ceramics have a very good application prospect in the fields of information storage, satellite communication, spintronics, magnetoelectric transducers, multifunctional electronic devices and the like.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, and relates to a rare earth element europium (A site) and a transition metal element zirconium (B site) co-doped bismuth ferrite multiferroic ceramic with ferroelectricity and ferromagnetism at room temperature and its preparation method. Background technique [0002] Multiferroic materials not only have ferroelectricity and magnetism at the same time, but more importantly, the ferroelectricity and magnetism of this kind of materials can be coupled with each other to produce some new physical phenomena such as magnetoelectric coupling effect, which is expected to realize ferroelectricity and magnetism. Magnetic mutual regulation. Multiferroic materials are a new type of multifunctional materials, which have broad application prospects in spintronics, information storage, sensors and other fields. [0003] Bismuth ferrite (BiFeO 3 ) is one of the few single-phase multiferroic mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/40C04B35/64H01F1/058
CPCC04B35/2675C04B35/64C04B2235/3224C04B2235/3244C04B2235/3298C04B2235/656C04B2235/661H01F1/0557H01F1/058
Inventor 代海洋李涛刘德伟薛人中陈靖陈镇平
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY