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Single-phase multiferroic barium ferrite ceramic material and preparation method thereof

A ceramic material and multiferroic technology, which is applied in the field of single-phase multiferroic barium ferrite ceramic material and its preparation, can solve the problems of limited application, ferroelectricity difficult to saturate polarization, weak ferromagnetism of bismuth ferrite, etc. Achieve the effect of low equipment requirements, good ferroelectricity and ferromagnetism, and uniform particle distribution

Inactive Publication Date: 2012-02-01
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large leakage conduction of bismuth ferrite, it is difficult to saturate and polarize the ferroelectricity at room temperature, and the ferromagnetism of bismuth ferrite is very weak, which greatly limits its application.

Method used

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  • Single-phase multiferroic barium ferrite ceramic material and preparation method thereof
  • Single-phase multiferroic barium ferrite ceramic material and preparation method thereof
  • Single-phase multiferroic barium ferrite ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to the Ba / Fe ratio of 1:10.5, weigh 0.2580g of barium acetate and 3.7082g of iron acetylacetonate, respectively, and dissolve them in 15ml of deionized water and 200ml of benzene, and weigh 1g of polyethylene glycol (molecular weight: 20000) and dissolve them in 10ml Reserve in deionized water. The obtained barium precursor solution and iron precursor solution were mixed and stirred for 2 hours, and 100 ml of an aqueous solution of polyethylene glycol and ammonia water were added and fully mixed at 50° C. for a certain period of time. The obtained suspension solution was centrifuged, and the centrifuged precipitate was placed in a corundum crucible and sintered at 450 °C for 1.5 h to remove organic matter. Incubate at 450°C for 1.5h, and then cool down to room temperature naturally. Then grind and sintered into ceramics at 1200°C. The specific steps of sintering are: raising the temperature from room temperature to 1000°C at a heating rate of 10°C / min, and th...

Embodiment 2

[0028] According to the Ba / Fe ratio of 1:9.8, weigh 0.2580g of barium nitrate and 3.4610g of ferric chloride, respectively, and dissolve them in 15ml of deionized water and 200ml of benzene, and weigh 1g of polyethylene glycol (molecular weight: 10000) and dissolve them in 15ml. Reserve in deionized water. The obtained barium precursor solution and the iron precursor solution were mixed and stirred for 2 hours, and 100 ml of polyethylene glycol aqueous solution and ammonia water were added and fully mixed at 50° C. for a certain period of time. The obtained suspension solution was centrifuged, and the centrifuged precipitate was placed in a corundum crucible and sintered at 350°C for 3 hours to remove organic matter. Incubate at ℃ for 3h, and then cool down to room temperature naturally. Then grind and sintered into ceramics at 1100°C. The specific steps of sintering are: raising the temperature from room temperature to 950°C at a heating rate of 10°C / min, and then increasing...

Embodiment 3

[0031]According to the Ba / Fe ratio of 1:10.5, weigh 0.2580g of barium acetate and 3.7082g of iron acetylacetonate, respectively, and dissolve them in 15ml of deionized water and 200ml of benzene, and weigh 1g of polyethylene glycol (molecular weight: 2000) and dissolve them in 10ml Reserve in deionized water. The obtained barium precursor solution and iron precursor solution were mixed and stirred for 2 hours, and 100 ml of an aqueous solution of polyethylene glycol and ammonia water were added and fully mixed at 50° C. for a certain period of time. The obtained suspension solution was centrifuged, and the centrifuged precipitate was placed in a corundum crucible and sintered at 400 °C for 2 hours to remove organic matter. Incubate at ℃ for 2 h, and then cool down to room temperature naturally. Then grind and sintered into ceramics at 1350°C. The specific steps of sintering are: raising the temperature from room temperature to 900°C at a heating rate of 10°C / min, and then inc...

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Abstract

The invention relates to a single-phase multiferroic barium ferrite ceramic material and a preparation method thereof. The preparation method comprises the following steps: weighing barium salt and ferric salt, forming a barium precursor solution and a ferric precursor solution, weighing polyethylene glycol, and dissolving the polyethylene glycol in deionized water for later use; mixing the precursor solutions, adding a mixed solution of ammonia water and polyethylene glycol, and mixing to obtain a suspension; centrifugalizing, pouring out the supernatant, washing the centrifugalized precipitate, calcining, and removing organic substances to obtain initial powder; and grinding, tabletting, and sintering at high temperature to obtain the target product. The barium ferrite ceramic material has multiferroic performance, and has excellent ferroelectricity and ferrimagnetism at room temperature; and the average particle size is 2 mu m or so, and, the particle distribution is uniform. The barium ferrite ceramic material has excellent ferroelectricity, ferrimagnetism and obvious multiferroic performance, and thus, is a practicable multiferroic material. In addition, the invention has the advantages of simple preparation technique, low facility request, accessible raw materials, low price and the like.

Description

technical field [0001] The invention relates to a single-phase multiferroic barium ferrite ceramic material and a preparation method thereof. Background technique [0002] Multiferroic materials integrate ferroelectric, ferromagnetic and ferroelastic properties, and have unique coupling effects between multiple fields (force, electricity, magnetism, heat and light), showing many important coupling properties, such as magnetic Electric, piezoelectric, pyroelectric and piezomagnetic effects are important advanced functional materials. The coupling properties of these materials provide a great degree of freedom for device design, so that they can be developed into various sensors, transducers, drivers and information memory, which are used in aerospace, automotive industry, biology, medicine, information and other technical fields , which has attracted widespread attention internationally. [0003] Since barium hexaferrite with magnetoplumbite structure was first synthesized ...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
Inventor 谭国龙陈秀娜
Owner WUHAN UNIV OF TECH
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