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Single-phase multiferroic M-type strontium ferrite ceramic and preparation method thereof

A strontium ferrite and multiferroic technology, which is applied in the field of single-phase multiferroic M-type strontium ferrite ceramic materials and their preparation, can solve the problems of difficulty in reaching saturation of ferroelectricity, large leakage current, etc. Good ferroelectricity and ferromagnetism

Inactive Publication Date: 2017-08-11
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its large leakage current, it is difficult to achieve saturation of ferroelectricity.

Method used

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  • Single-phase multiferroic M-type strontium ferrite ceramic and preparation method thereof
  • Single-phase multiferroic M-type strontium ferrite ceramic and preparation method thereof
  • Single-phase multiferroic M-type strontium ferrite ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] According to the Sr / Fe ratio of 1:9.5, weigh strontium acetate 0.30925g and iron acetylacetonate 5.0460 respectively and dissolve them in 15ml glycerin, 120ml alcohol and 50ml acetone, and weigh polyethylene glycol (molecular weight: 20000) 1g first. Dissolve in 5ml of deionized water and add 45ml of ammonia water for later use. At the same time, mix the obtained iron precursor solution at 70°C for 6 to 8 hours to prevent the hydrolysis of iron acetylacetonate; then add the prepared strontium precursor solution and fully mix it at 70°C for a certain period of time; finally, the configured A good mixture of polyethylene glycol and ammonia water is poured into the precursor mixture of strontium and iron and fully reacted at 70°C for more than 24 hours. Centrifuge the obtained suspension solution, pour off the supernatant, and dry the centrifuged precipitate in an oven at 90°C, put the dried precipitate into a corundum crucible, and raise the temperature from room temperat...

Embodiment 2

[0037] According to the Sr / Fe ratio of 1:9.5, weigh strontium acetate 0.30925g and iron acetylacetonate 5.0460 respectively and dissolve them in 15ml of glycerin, 120ml of alcohol and 50ml of acetone, and weigh 1g of polyethylene glycol (molecular weight: 20000) First dissolve in 5ml deionized water and then add 45ml ammonia water for later use. At the same time, mix the obtained iron precursor solution at 70°C for 6 to 8 hours to prevent the hydrolysis of iron acetylacetonate; then add the configured strontium precursor solution and mix it at 70°C for a certain period of time; finally, the configured The mixture of polyethylene glycol and ammonia water is poured into the precursor mixture of strontium and iron and fully reacted at 70°C for more than 24 hours. Centrifuge the obtained suspension solution, pour off the supernatant, and dry the centrifuged precipitate in an oven at 90°C, put the dried precipitate into a corundum crucible, and raise the temperature from room tempe...

Embodiment 3

[0040]According to the Sr / Fe ratio of 1:9.5, weigh strontium acetate 0.30925g and iron acetylacetonate 5.0460 respectively and dissolve them in 15ml glycerin, 120ml alcohol and 50ml acetone, and weigh polyethylene glycol (molecular weight: 20000) 1g first. Dissolve in 5ml of deionized water and add 45ml of ammonia water for later use. At the same time, mix the obtained iron precursor solution at 70°C for 6 to 8 hours to prevent the hydrolysis of iron acetylacetonate; then add the prepared strontium precursor solution and fully mix it at 70°C for a certain period of time; finally, the configured A good mixture of polyethylene glycol and ammonia water is poured into the precursor mixture of strontium and iron and fully reacted at 70°C for more than 24 hours. Centrifuge the obtained suspension solution, pour off the supernatant, and dry the centrifuged precipitate in an oven at 90°C, put the dried precipitate into a corundum crucible, and raise the temperature from room temperatu...

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Abstract

The invention relates to a single-phase multiferroic M-type strontium ferrite ceramic material and a preparation method thereof. The chemical formula of the ceramic material is SrFe12O19 and belongs to a hexagonal crystal system, the space group is P63 / mmc, crystal grains are uniformly distributed, the average crystal grain is 0.5-5 mu m, and the ceramic material is in dark red and has good ferroelectricity and ferromagnetism simultaneously at the room temperature. The single-phase multiferroic M-type strontium ferrite ceramic material and the preparation method have the beneficial effects that the prepared M-type strontium ferrite ceramic material has multiferroic performance, has saturated ferroelectric hysteresis loop and larger magnetic field coercivity at the room temperature, thereby being capable of having quite good ferroelectricity and ferromagnetism simultaneously. Meanwhile, tests prove that the remanent polarization of the M-type strontium ferrite ceramic material is 126.98 mu C / cm<2>, the coercive electric field is 8.28 kV / m, the remanent magnetization is 35.8 emu / g, and the coercive field is 6192Oe.

Description

technical field [0001] The invention relates to a single-phase multiferroic M-type strontium ferrite ceramic material and a preparation method thereof. Background technique [0002] Multiferroic materials are a new class of multifunctional materials, which integrate ferroelectric and ferromagnetic properties, and can exhibit magnetoelectric coupling between electric and magnetic properties. It not only improves the shortcomings of pure ferroelectric materials or ferromagnetic materials, but also possesses the orderliness of magnetism and electricity. At the same time, in this material system or its composite structure, the coexistence and mutual coupling of electricity and magnetism can be realized. That is to say, under the action of an external magnetic field, the electric polarization response of the material can be realized, or the magnetic spin order of the material can be realized under the action of an external electric field. The coupling performance of these mater...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622C04B35/626C04B35/64
Inventor 谭国龙黄耀盛号号
Owner WUHAN UNIV OF TECH
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