Ferrotitanium bismuth cobaltate ceramic material with five-laminated structure and multiferroic performance and preparation method thereof

A technology of bismuth iron cobaltate and layered structure, which is applied in the field of five-layer structure bismuth titanium iron cobaltate ceramic material and its preparation, can solve the problems of different temperatures above room temperature, and achieve improved ferromagnetic properties and environmental coordination Good, low sintering temperature effect

Inactive Publication Date: 2011-08-31
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In double perovskite (such as: Bi 2 MnNiO 6 ) research found that in the B site of the sample with two kinds of d 0 Coupling the magnetic ions of the electronic structure can greatly improve the ferromagnetic properties of the sample, but there are still two main problems in the research of double perovskite materials: (1) The sample synthesis must be prepared under high pressure, and it is difficult to make the sample The B-site ions have good order; (2) The phase transition temperatures of the ferroelectric and ferromagnetic samples are different and above room temperature

Method used

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  • Ferrotitanium bismuth cobaltate ceramic material with five-laminated structure and multiferroic performance and preparation method thereof
  • Ferrotitanium bismuth cobaltate ceramic material with five-laminated structure and multiferroic performance and preparation method thereof
  • Ferrotitanium bismuth cobaltate ceramic material with five-laminated structure and multiferroic performance and preparation method thereof

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Effect test

Embodiment 1

[0025] The chemical formula of bismuth titanium iron cobaltate ceramic material with multiferroic properties is Bi 6 FeCoTi 3 o 18 . Based on the metal oxide Bi 2 o 3 , Fe 2 o 3 、Co 2 o 3 and TiO 2 As the raw material, the solid phase sintering process is adopted to synthesize Bi 6 FeCoTi 3 o 18 .

Embodiment 2

[0027] The preparation method of the five-layer structure bismuth titanium iron cobaltate ceramic material with multiferroic properties comprises the following steps:

[0028] (1) Select the analytically pure bismuth oxide Bi produced by Sinopharm Group 2 o 3 , Analytical pure iron oxide Fe 2 o 3 , Analytical pure cobalt oxide Co 2 o 3 and spectroscopically pure titanium oxide TiO 2 as the raw material, where Bi 2 o 3 : Fe 2 o 3 :Co 2 o 3 :TiO 2 The molar ratio is 6-6.6:1:1:6, and the raw materials are baked in an oven at a temperature of 105-115°C for 7-9 hours;

[0029] (2) Adopt traditional solid-phase sintering process, put the proportioning raw material in the step (1) in the ball mill, carry out ball milling with absolute ethanol as medium, dry after 20-24 hours ball mill mixing, drying temperature is 105-115°C, put the dried product into an alumina crucible, and carry out pre-synthesis in the air at a temperature of 760-820°C for 7-10 hours, and then perfor...

Embodiment 3

[0035] The preparation method of the five-layer structure bismuth titanium iron cobaltate ceramic material with multiferroic properties comprises the following steps:

[0036] (1) Raw material selection: select analytically pure bismuth oxide Bi 2 o 3 , Analytical pure ferric oxide Fe 2 o 3 , Analytical pure cobalt trioxide Co 2 o 3 and spectroscopically pure titanium oxide TiO 2 As raw materials, the raw materials all adopt the products of Sinopharm Chemical Reagent Co., Ltd., and the raw materials are baked at 110°C in an oven for 8 hours before weighing; weigh and analyze pure bismuth oxide (Bi 2 o 3 ), analytically pure ferric oxide (Fe 2 o 3 ), analytically pure cobalt trioxide (Co 2 o 3 ) and BTO powder sample, the specific weight is as in table (1);

[0037] Table 1: Preparation of Bi 6 FeCoTi 3 o 18 raw material

[0038]

[0039] (2) Ball milling and pre-synthesis: the weighed analytically pure bismuth oxide (Bi 2 o 3 ), analytically pure ferric oxi...

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Abstract

The invention discloses a ferrotitanium bismuth cobaltate ceramic material with five-laminated structure and multiferroic performance and a preparation method thereof, belong to the technical field of oxide ceramic materials. The chemical formula of the ferrotitanium bismuth cobaltate ceramic material is Bi6FeCoTi3O18. The preparation method comprises the following steps of: selecting analytically pure Bi2O3, analytically pure Fe2O3, analytically pure Co2O3 and spectroscopically pure TiO2 serving as raw materials, wherein the molar ratio of Bi2O3 to Fe2O3 to Co2O3 to TiO2 is (6-6.6):1:1:6; and performing ball milling, drying, pre-synthesis, secondary ball milling, drying, molding, plastic removal and sintering by adopting the conventional solid-phase sintering process to obtain Bi6FeCoTi3O18. Conventional raw materials and the current solid-phase process are adopted, and the preparation steps are performed at the low-pressure condition, so that the obtained product has high ferroelectricity and high ferromagnetism. The ferrotitanium bismuth cobaltate ceramic material has the advantages of simple process, high stability, low sintering temperature, material nontoxicity and high environmental coordination.

Description

technical field [0001] The invention relates to a five-layer bismuth titanironcobaltate ceramic material with multiferroic properties and a preparation method thereof, belonging to the technical field of oxide ceramic materials. 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, multi-state information storage, electrically driven ferromagnetic resonat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/475C04B35/622
Inventor 陈小兵毛翔宇王伟陆亚林杨文露陈春燕
Owner YANGZHOU UNIV
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