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

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

Inactive Publication Date: 2013-06-12
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 and dissolve them in 15ml of deionized water and 200ml of benzene. Reserve in deionized water. The obtained barium precursor solution and iron precursor solution were mixed and stirred for 2 hours, then 100 ml of polyethylene glycol aqueous solution and ammonia water were added and mixed thoroughly at 50° C. for a certain period of time. Centrifuge the obtained suspension solution, place the centrifuged precipitate in a corundum crucible and sinter at 450°C for 1.5h to remove organic matter. Keep warm at 450°C for 1.5h, then cool down to room temperature naturally. Then grind and press the tablet and sinter it into ceramics at 1200°C. The specific steps of sintering are: increase the temperature from room temperature to 1000°C at a rate of 10°C / min, and then increase the temperature from 1000°C at a rate of 5°C / min. to 1200°C, and then kept at this temperature f...

Embodiment 2

[0027] According to the Ba / Fe ratio of 1:9.8, weigh 0.2580g of barium nitrate and 3.4610g of ferric chloride and dissolve them in 15ml of deionized water and 200ml of benzene. Reserve in deionized water. The obtained barium precursor solution and iron precursor solution were mixed and stirred for 2 hours, then 100 ml of polyethylene glycol aqueous solution and ammonia water were added and mixed thoroughly at 50° C. for a certain period of time. Centrifuge the obtained suspension solution, and place the centrifuged precipitate in a corundum crucible to sinter at 350°C for 3 hours to remove organic matter. ℃ for 3 hours, and then cooled down to room temperature naturally. Then grind and press the tablet and sinter it into ceramics at 1100°C. The specific steps of sintering are: from room temperature to 950°C at a heating rate of 10°C / min, and then from 950°C to 950°C at a heating rate of 5°C / min. to 1100°C, and then kept at this temperature for 1h, then dropped from the sinter...

Embodiment 3

[0029]According to the Ba / Fe ratio of 1:10.5, weigh 0.2580g of barium acetate and 3.7082g of iron acetylacetonate and dissolve them in 15ml of deionized water and 200ml of benzene, and weigh 1g of polyethylene glycol (molecular weight: 2000) and dissolve it in 10ml Reserve in deionized water. The obtained barium precursor solution and iron precursor solution were mixed and stirred for 2 hours, then 100 ml of polyethylene glycol aqueous solution and ammonia water were added and mixed thoroughly at 50° C. for a certain period of time. Centrifuge the obtained suspension solution, and place the centrifuged precipitate in a corundum crucible to sinter at 400°C for 2 hours to remove organic matter. ℃ for 2 hours, and then cooled down to room temperature naturally. Then grind and press the tablet and sinter it into ceramics at 1350°C. The specific steps of sintering are: from room temperature to 900°C at a heating rate of 10°C / min, and then from 900°C to 900°C at a heating rate of 5...

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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 the properties of ferroelectricity, ferromagnetism and ferroelasticity, and have unique coupling effects between multiple fields (force, electricity, magnetism, heat and light), showing many important coupling properties, such as magnetic Electricity, piezoelectricity, pyroelectricity 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 storage, which are used in aerospace, automotive industry, biology, medicine, information and other technical fields , has aroused widespread concern internationally. [0003] Since the first synthesis of barium hexagonal ferrite with magne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 谭国龙陈秀娜
Owner WUHAN UNIV OF TECH
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