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

A technology of ceramic material and layered structure, applied in the field of oxide ceramic material preparation, can solve the problems of difficulty in preparation of pure-phase BFO material, small ferroelectric residual polarization, hindering practical steps, etc. Preparation temperature and good stability

Inactive Publication Date: 2009-12-23
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 conditions used in the examples:

[0022] (1) Preparation of sample materials:

[0023] 1) Select analytical pure bismuth oxide (Bi 2 O 3 ), analysis of pure iron trioxide (Fe 2 O 3 ), analytical pure cobalt trioxide (Co 2 O 3 ) And spectral pure titanium oxide (TiO 2 ) Is the raw material, and the raw materials are all products of Shanghai Chemical Reagent Company. The raw materials are baked in an oven at a temperature of 110°C for 8 hours before weighing.

[0024] 2) Preparation of BTO powder: The weighed bismuth oxide and titanium oxide (shown in Table 1) are milled with anhydrous ethanol as the medium, mixed by ball milling for 24 hours, dried, and then loaded into an alumina crucible Inside, press lightly, and perform synthesis at 760°C, 780°C and 800°C in air for 8 hours, 16 hours and 24 hours. Ball milling and drying are performed after each synthesis, and the ball milling time is 24 hours to prepare BTO powder samples.

[0025] Table (1)...

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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 oxide ceramic material preparation, and particularly relates to a preparation process of a titanic iron bismuth cobaltate ceramic with a layered perovskite structure and ferroelectricity and ferromagnetism. Background technique [0002] Magnetoelectric multiferroic materials refer to materials that exhibit ferroelectric sequence and ferromagnetic / antiferromagnetic sequence at the same time in a certain temperature range, and there is a certain coupling between each other. 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 equipment, but more importantly, it can use the coupling between magnetism and electricity to provide additional equipment for the design and application of the equipment. One degree of freedom, thus showing extremely attractive application prospects in the emerging spintronics, ...

Claims

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Application Information

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IPC IPC(8): C04B35/475C04B35/622
Inventor 陈小兵毛翔宇王伟陆亚林
Owner YANGZHOU UNIV
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