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La rear earth ion doped-bismuth titanate spinel ferrite ferroelectric ferromagnetic composite film and its preparation method

A spinel ferrite, ion doping technology, applied in the application of magnetic film to substrate, magnetic layer, etc., can solve the uneven distribution of ferroelectric phase and ferromagnetic phase, and it is difficult to achieve molecular-level contact, etc. problems, to achieve good microscopic contact, cheap instruments and raw materials, and low cost

Inactive Publication Date: 2007-12-19
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are also very few research reports using the chemical solution method to prepare such composite lead-based films, but the process used is to directly disperse ferromagnetic particles in the ferroelectric solution, which leads to uneven distribution of ferroelectric and ferromagnetic phases. , it is difficult to reach the molecular level contact

Method used

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  • La rear earth ion doped-bismuth titanate spinel ferrite ferroelectric ferromagnetic composite film and its preparation method
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  • La rear earth ion doped-bismuth titanate spinel ferrite ferroelectric ferromagnetic composite film and its preparation method

Examples

Experimental program
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Embodiment 1

[0032] This experiment is to prepare a composite film with a molar ratio of Nd-doped bismuth titanate and cobalt ferrite at a ratio of 1:1. The specific steps are as follows:

[0033] 1. Preparation of neodymium-doped bismuth titanate / cobalt ferrite mixed solution: first prepare the neodymium-doped bismuth titanate precursor solution, press Bi 3.15 Nd 0.85 Ti 3 o 12 In the formula, the mol ratio of Bi and Nd takes by weighing bismuth nitrate (10% in excess) and neodymium nitrate 1.6978g and 0.3865g respectively, then adds glacial acetic acid as solvent, and its mixture is completely dissolved by magnetic stirring at normal temperature to obtain solution A; The molar ratio of bismuth, neodymium and titanium is 3.15:0.85:3, weigh 1.0419g of tetrabutyl titanate and put it into another container, then add an appropriate amount of acetylacetone as a stabilizer, then add the solvent glacial acetic acid, stir for a while to obtain solution B ;While stirring solution A with a magne...

Embodiment 2

[0037] This experiment is to prepare a composite film with a molar ratio of Nd-doped bismuth titanate and cobalt ferrite of 1:0.5. The specific steps are as follows:

[0038] 1. Preparation of neodymium-doped bismuth titanate / cobalt ferrite mixed solution: first prepare the neodymium-doped bismuth titanate precursor solution, press Bi 3.15 Nd 0.85 Ti 3 o 12 In the formula, the mol ratio of Bi and Nd takes by weighing bismuth nitrate (10% in excess) and neodymium nitrate 1.6978g and 0.3865g respectively, then adds glacial acetic acid as solvent, and its mixture is completely dissolved by magnetic stirring at normal temperature to obtain solution A; The molar ratio of bismuth, neodymium and titanium is 3.15:0.85:3, weigh 1.0419g of tetrabutyl titanate and put it into another container, then add an appropriate amount of acetylacetone as a stabilizer, then add the solvent glacial acetic acid, stir for a while to obtain solution B ;While stirring solution A with a magnetic stirr...

Embodiment 3

[0042] This experiment is to prepare a composite film with a molar ratio of Nd-doped bismuth titanate and nickel ferrite of 1:0.75. The specific steps are as follows:

[0043] 1. Preparation of neodymium-doped bismuth titanate / nickel ferrite mixed solution: first prepare the neodymium-doped bismuth titanate precursor solution, press Bi 3.15 Nd 0.85 Ti 3 o 12 In the formula, the mol ratio of Bi and Nd takes by weighing bismuth nitrate (10% in excess) and neodymium nitrate 1.6978g and 0.3865g respectively, then adds glacial acetic acid as solvent, and its mixture is completely dissolved by magnetic stirring at normal temperature to obtain solution A; The molar ratio of bismuth, neodymium and titanium is 3.15:0.85:3, weigh 1.0419g of tetrabutyl titanate and put it into another container, then add an appropriate amount of acetylacetone as a stabilizer, then add the solvent glacial acetic acid, stir for a while to obtain solution B ;While stirring solution A with a magnetic stir...

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Abstract

This invention relates to a lead-free ferrite ferromagnetic compound film of bismuth titanate / spinel ferrite doped with lanthanide series rare earth ions and its preparation method, first of all which prepares lanthanide series of rare earth ionic doped bismuth titanate ferroelectric solution and places it for 3-7days, then prepares a spinel ferrite ferromagnetic solution and takes acetylacetone as the stabilizer to mix the bismuth titanate ferroelectric solution with the ferrite ferromagnetic solution to get a uniform mixed solution of them then to filter and coat it on the substrate uniformly by a glue-throwing and spin coating technology to get a wet film to be baked, pyrogenated and annealed to get a ferroelectric and ferromagnetic compound film of single layer multi-crystal lanthanide series rare earth ionic doped bismuth titanate / spinel ferrite and then repeats the above mentioned steps to get the film with necessary thickness. Said compound film does not contain lead.

Description

technical field [0001] The present invention relates to a lead-free ferroelectric and ferromagnetic composite film, and in particular provides a lead-free lanthanide rare earth ion-doped bismuth titanate / spinel ferrite ferroelectric and ferromagnetic composite film and a preparation method thereof . Background technique [0002] Ferroelectric ferromagnetic composite material is a kind of multifunctional material. It is composed of two single-phase materials-ferroelectric phase and ferromagnetic phase material through a certain method. It is an effective way to obtain ferroelectricity and magnetism at the same time. In addition to the various properties of a single material, this type of composite material will also have many new properties due to the coupling between electric polarization and magnetization, such as the magnetoelectric effect. Due to its excellent physical properties, it has a wide range of applications in the fields of sensors, data storage, and magnetoelec...

Claims

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Application Information

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IPC IPC(8): H01F10/12H01F10/20H01F41/14
Inventor 钟向丽廖敏王金斌周益春
Owner XIANGTAN UNIV
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