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Method for improving multi-ferrum property of BiFeO3 ceramic block material

A technology of bulk materials and ceramic blocks, which is applied in the field of preparation of improving the multiferroic properties of ceramic bulk materials, can solve the problems of poor ferroelectric properties and large leakage current, and achieve good ferroelectric properties, no leakage, and good magnetic properties Effect

Inactive Publication Date: 2010-03-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention is in order to solve existing BiFeO 3 The problem of large leakage current and poor ferroelectric performance of ceramic bulk materials provides a way to improve BiFeO 3 Methods for Multiferroic Properties of Ceramic Bulk Materials

Method used

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  • Method for improving multi-ferrum property of BiFeO3 ceramic block material
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  • Method for improving multi-ferrum property of BiFeO3 ceramic block material

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specific Embodiment approach 1

[0008] Specific implementation mode 1: This implementation mode improves BiFeO 3 The method for the multiferroic properties of ceramic bulk materials is carried out according to the following steps: one, according to the chemical formula Bi y Fe (1-x) Ti x o 3 According to the molar ratio of y:1-x:x, respectively weigh Bi with a purity of 99.99%. 2 o 3 , Fe with a purity of 99.99% 2 o 3 and TiO with a purity of 99.99% 2 , mixed to obtain batching powder, wherein 03 Multiferroic properties of ceramic bulk materials.

specific Embodiment approach 2

[0009] Specific embodiment two: the difference between this embodiment and specific embodiment one is that Bi in step one 2 o 3 The particle size is 5 ~ 11μm, Fe 2 o 3 The particle size of TiO is 1-5μm. 2 The particle size is 1-5 μm. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0010] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in step 2, the mass ratio of ball to material for placing the batching powder in the ball mill tank for ball milling is 10:1, the ball milling time is 30h, and the ball milling speed is 250r / min. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

A method for improving multi-ferrum property of BiFeO3 ceramic block material relates to a preparation method for improving the multi-ferrum property of the ceramic block material. The method solves the problems of great leakage current and poor ferroelectric property of the existing BiFeO3 ceramic block material. The method is carried out as follows: firstly, obtaining mixture powder by mixing raw materials according to a certain stoichiometric ratio; secondly, placing the mixture powder into an agate jar for ball milling; thirdly, pressing the ball-milled powder into round tablets; and fourthly, placing the round tablets into a ceramic crucible for sintering, and then cooling the sintered round tablets to the room temperature, therefore, the multi-ferrum property of the BiFeO3 ceramic block material is improved. The method does not lead to the generation of miscellaneous phases in the preparation process, and the obtained BiFeO3 ceramic block material is a single-phase block. The BiFeO3 ceramic block material obtained by the method has good ferroelectric property and is free from electricity leakage.

Description

technical field [0001] The invention relates to a preparation method for improving the multiferroic performance of a ceramic block material. Background technique [0002] BiFeO 3 (BFO) is a multiferroic ceramic bulk material, that is, a material that has two or all of the three characteristics of ferromagnetism, ferroelectricity, and ferroelasticity in the same state. In recent years, BFO has become a minority at room temperature One of the materials with both ferroelectricity and magnetism has attracted more and more attention. However, when BFO exists in bulk form, the leakage current is very large, and the ferroelectric properties cannot even be tested, and it is easy to produce The impurity phase, the ferroelectric performance of existing BFO materials is poor. Contents of the invention [0003] The present invention is in order to solve existing BiFeO 3 The problem of large leakage current and poor ferroelectric performance of ceramic bulk materials provides a way ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/453
Inventor 李宜彬赫晓东孙跃孙玉芳
Owner HARBIN INST OF TECH