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Multiferroic ferrotitanium bismuth cobaltates ceramic material with laminated structure and preparation method thereof

A ceramic material and layered structure technology, applied in the field of oxide ceramic material preparation, can solve the problems of difficulty in the preparation of pure-phase BFO materials, obstacles to practical progress, small ferroelectric remanent polarization, etc., and achieve environmental coordination and reduce Effect of preparation temperature, good ferroelectricity and ferromagnetism

Inactive Publication Date: 2012-05-23
YANGZHOU UNIV
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Problems solved by technology

Nevertheless, BFO materials, regardless of ceramic and thin film forms, have some disadvantages to be overcome, such as large dielectric loss, high leakage current, small ferroelectric remanent polarization, large coercive field and its non-uniform magnetic properties. Spin structure, etc. In addition, the preparation of pure phase BFO materials also has certain difficulties, which hinder its practical pace.

Method used

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  • Multiferroic ferrotitanium bismuth cobaltates ceramic material with laminated structure and preparation method thereof
  • Multiferroic ferrotitanium bismuth cobaltates ceramic material with laminated structure and preparation method thereof
  • Multiferroic ferrotitanium bismuth cobaltates ceramic material with laminated structure and preparation method thereof

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Embodiment Construction

[0021] The preparation process and condition that embodiment adopts:

[0022] (1) Preparation of sample raw materials:

[0023] 1) Analytical pure bismuth oxide (Bi 2 o 3 ), analytically pure ferric oxide (Fe 2 o 3 ), analytically pure cobalt trioxide (Co 2 o 3 ) and spectroscopically pure titanium oxide (TiO 2 ) as a raw material, the raw materials all adopt the products of Shanghai Chemical Reagent Company, and the raw materials were baked at 110° C. in an oven for 8 hours before weighing.

[0024] 2) Preparation of BTO powder: The weighed bismuth oxide and titanium oxide (shown in Table 1) are ball milled with anhydrous described above with absolute ethanol as the medium, dried after ball milling for 24 hours, and packed into an alumina crucible Inside, lightly compacted, in air at temperatures of 760°C, 780°C, and 800°C, respectively, for 8 hours, 16 hours, and 24 hours of synthesis. Ball milling and drying were performed after each synthesis, and the ball milling ...

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Abstract

The invention relates to a multiferroic ferrotitanium bismuth cobaltates ceramic material with laminated structure and a preparation method thereof, which pertains to the technical field of oxide ceramic material preparation. Bi4Ti3O12 and BiCoO3 are implanted in BiFeO3 to generate Bi5Fe0.5Co0.5Ti3O15 (BFCT). The technology is simple and reasonable, and has good compatibility with current solid phase technology; the sample preparation temperature is far lower than that of current technology, thus greatly reducing energy consumption and facilitating industrialized production. In the BFCT, due to relative orderly arrangement of Fe-O and Co-O octahedron, local coupling of Fe-O-Co can be obtained, thus leading the magnetism of sample to be high.

Description

technical field [0001] The invention belongs to the technical field of preparation of oxide ceramic materials, and in particular relates to a preparation process of a bismuth titanoiron cobaltate ceramic having a layered perovskite structure and simultaneously having ferroelectricity and ferromagnetism. Background technique [0002] Magnetoelectric multiferroic materials refer to materials that exhibit ferroelectric order and ferromagnetic / antiferromagnetic order at the same time in a certain temperature range, and there is a certain coupling between them. Recently, this material has attracted more and more attention. On the one hand, it can not only be used in the research and development of ferroelectric and magnetic devices, but more importantly, it can use the coupling between magnetoelectricity to provide additional advantages for the design and application of devices. One degree of freedom, thus showing extremely attractive application prospects in emerging spintronics...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F10/20C04B35/475C04B35/622
Inventor 陈小兵毛翔宇王伟陆亚林
Owner YANGZHOU UNIV
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