Method for preparing Aurivillius-phase SrBiFeCoTiO material through microwave sintering and product prepared by method

A microwave sintering and colloid technology, applied in the field of functional materials, can solve the problems of easy occurrence of impurity ions, reduced material properties, long holding time, etc., and achieve the effect of shortening high temperature holding time, high energy utilization rate, and reducing sintering temperature

Active Publication Date: 2018-04-20
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 through microwave sintering and product prepared by method
  • Method for preparing Aurivillius-phase SrBiFeCoTiO material through microwave sintering and product prepared by method
  • Method for preparing Aurivillius-phase SrBiFeCoTiO material through microwave sintering and product prepared by method

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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

The invention discloses a method for preparing an Aurivillius-phase SrBiFeCoTiO material through microwave sintering and a product prepared by the method. The method comprises the following steps: 1)proportionally dissolving the raw materials bismuth nitrate pentahydrate, cobaltous acetate tetrahydrate, tetrabutyl titanate, strontium acetate and iron nitrate nonahydrate in solvents glacial aceticacid and acetylacetone to obtain a SrBiFeCoTiO precursor colloid; 2) removing the solvents from the obtained SrBiFeCoTiO precursor colloid, and drying to obtain SrBiFeCoTiO dry gel; 3) grinding the obtained dry gel and pyrolyzing for 90-120min at 350-400 DEG C to obtain SrBiFeCoTiO precursor powder; 4) performing microwave calcination on the obtained precursor powder in a microwave sintering furnace to obtain the Aurivillius-phase SrBiFeCoTiO material. According to the method disclosed by the invention, traditional heat conducting heating technology is replaced by the microwave sintering technology, the growth driving force in the sintering process of the SrBiFeCoTiO material can be increased, the sintering temperature is effectively reduced, and the high temperature maintaining time is shortened.

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 Applications(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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