Method for preparing aurivillius phase srbifecotio material by microwave sintering and prepared product

A microwave sintering and colloidal technology, which is applied in the field of functional materials, can solve the problems of impurity ions, material performance degradation, long holding time, etc., and achieve the effects of shortening high temperature holding time, high energy utilization rate, and reducing sintering temperature

Active Publication Date: 2021-02-05
ANYANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing solid-state sintering preparation method, the preparation of Aurivillius phase oxide ceramic materials requires relatively high temperature (800-1000°C) and long holding time (2 hours-10 hours), and impurity phases and Cause Bi 3+ A large amount of volatilization of ions, thereby reducing the performance of the material

Method used

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  • Method for preparing aurivillius phase srbifecotio material by microwave sintering and prepared product
  • Method for preparing aurivillius phase srbifecotio material by microwave sintering and prepared product
  • Method for preparing aurivillius phase srbifecotio material by microwave sintering and prepared product

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Embodiment 1

[0035] A method for preparing Aurivillius phase SrBiFeCoTiO material by microwave sintering, the specific material is SrBi 5 Fe 0.4 co 0.6 Ti 4 o 18 , the material has a layered perovskite-like structure, and its space group is orthorhombic B2cb , the preparation process includes the following steps:

[0036] 1) Mix 7.717 g of bismuth nitrate pentahydrate powder and 30 ml of glacial acetic acid solution, heat and stir at 60°C, after the bismuth nitrate powder is completely dissolved, add 0.451 g of cobalt acetate tetrahydrate powder, continue heating and stirring until the powder is completely dissolved to obtain Mixture A;

[0037] 2) Weigh 4.125 g of tetrabutyl titanate, add 20 ml of acetylacetone solution, heat and stir at 60°C until the two are evenly mixed to obtain a mixture B. Slowly pour the mixed solution A obtained in step 1) into the mixed solution B, continue heating and stirring, and obtain a clear and transparent mixed solution as mixed solution C;

[003...

Embodiment 2

[0043] A method for preparing Aurivillius phase SrBiFeCoTiO material by microwave sintering, the specific material is SrBi 5 Fe 0.4 co 0.6 Ti 4 o 18 , the material has a layered perovskite-like structure, and its space group is orthorhombic B2cb , the preparation process includes the following steps:

[0044]1) Mix 9.003 g of bismuth nitrate pentahydrate powder and 30 ml of glacial acetic acid solution, heat and stir at 60°C, after the bismuth nitrate powder is completely dissolved, add 0.523 g of cobalt acetate tetrahydrate powder, continue heating and stirring until the powder is completely dissolved to obtain Mixture A;

[0045] 2) Weigh 4.813 g of tetrabutyl titanate, add 20 ml of acetylacetone solution, heat and stir at 60°C until the two are evenly mixed to obtain a mixture B. Slowly pour the mixed solution A obtained in step 1) into the mixed solution B, continue heating and stirring, and obtain a clear and transparent mixed solution as mixed solution C;

[0046...

Embodiment 3

[0051] A method for preparing Aurivillius phase SrBiFeCoTiO material by microwave sintering, the specific material is SrBi 5 Fe 0.4 co 0.6 Ti 4 o 18 , the material has a layered perovskite-like structure, and its space group is orthorhombic B2cb , the preparation process includes the following steps:

[0052] 1) Mix 10.289 g of bismuth nitrate pentahydrate powder and 30 ml of glacial acetic acid solution, heat and stir at 70°C, after the bismuth nitrate powder is completely dissolved, add 0.601 g of cobalt acetate tetrahydrate powder, continue heating and stirring until the powder is completely dissolved to obtain Mixture A;

[0053] 2) Weigh 5.500 g of tetrabutyl titanate, add 20 ml of acetylacetone solution, heat and stir at 70°C until the two are evenly mixed to obtain a mixture B. Slowly pour the mixed solution A obtained in step 1) into the mixed solution B, continue heating and stirring, and obtain a clear and transparent mixed solution as mixed solution C;

[00...

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Abstract

A method for preparing Aurivillius phase SrBiFeCoTiO material by microwave sintering, comprising the following steps: 1) dissolving raw materials bismuth nitrate pentahydrate, cobalt acetate tetrahydrate, tetrabutyl titanate, strontium acetate, and iron nitrate nonahydrate in proportion to solvent glacial acetic acid and acetylacetone to prepare SrBiFeCoTiO precursor colloid; 2) The obtained SrBiFeCoTiO precursor colloid was removed from the solvent and dried to obtain SrBiFeCoTiO xerogel; 3) The obtained xerogel was ground and pyrolyzed at 350-400°C for 90-120 minutes to obtain SrBiFeCoTiO Precursor powder; 4) The obtained precursor powder is microwave-calcined in a microwave sintering furnace. The invention replaces the traditional heat conduction heating process with a microwave sintering process, which can increase the growth driving force in the sintering process of the SrBiFeCoTiO material, effectively reduce the sintering temperature, and shorten the high temperature holding time.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to a method for preparing Aurivillius phase SrBiFeCoTiO materials by microwave sintering and products thereof. Background technique [0002] A multiferroic material refers to a material in which two or more iron sequences exist in the same material, and the iron sequences can be coupled to each other. In single-phase materials, magnetism and ferroelectricity have certain mutual repulsion, so the single-phase multiferroic materials that can be applied at present are very rare. Aurivillius phase bismuth layered structure oxide is the addition of BiFeO 3 In addition, it is one of the few single-phase materials that can exhibit ferromagnetic / ferroelectric coexistence at room temperature. The natural superlattice structure determines that it has rich physical properties, making it useful in electricity, magnetism, and optics. It has important research value in basic phys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/475C04B35/626C04B35/624
CPCC04B35/475C04B35/624C04B35/626C04B2235/3213C04B2235/3272C04B2235/3275
Inventor 高倩倩戴玉强崔朝军华守亮刘栓江李现常李成波
Owner ANYANG INST OF TECH
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