Method for preparing strontium titanate nanometer powder of one-dimensional structure

A technology of nanopowder and strontium titanate, which is applied in the field of preparation of one-dimensional structure strontium titanate nanopowder, can solve the problems of low product purity, difficulty in controlling particle size and shape, and achieve simple equipment and easy process conditions Controlled, low-cost effects

Inactive Publication Date: 2008-11-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional preparation method of strontium titanate powder is the solid phase reaction method. Although the process is simple, the product prepared by this method has low purity.
Due to the high temperature calcination process, the particle agglomeration is very serious, and the size and shape of the particles are difficult to control

Method used

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  • Method for preparing strontium titanate nanometer powder of one-dimensional structure
  • Method for preparing strontium titanate nanometer powder of one-dimensional structure
  • Method for preparing strontium titanate nanometer powder of one-dimensional structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Weigh 1.702g of tetrabutyl titanate, add it to 10ml of absolute ethanol, and magnetically stir until dissolved;

[0025] 2) Under stirring, add 1 ml of ammonia solution with a mass concentration of 30% to the ethanol solution of tetrabutyl titanate prepared in step 1), precipitate, filter, and wash to obtain a precipitate of titanium oxyhydroxide;

[0026] 3) Weigh 0.529g of strontium nitrate, add it to 10ml of deionized water, and magnetically stir until dissolved;

[0027] 4) Weigh 0.016g of polyvinyl alcohol, add it into 10ml of deionized water, heat, and magnetically stir until dissolved;

[0028] 5) The oxyhydroxide precipitation of titanium, the aqueous solution of strontium nitrate, the aqueous solution of polyvinyl alcohol and 1.710g of potassium hydroxide solids are added in the reaction kettle liner with a volume of 60ml, and the volume of the precursor slurry is adjusted with deionized water to 80% of the volume of the inner tank of the reaction kettle, s...

Embodiment 2

[0031] 1) Weigh 1.702g of tetrabutyl titanate, add it to 10ml of absolute ethanol, and magnetically stir until dissolved;

[0032] 2) Under stirring, add 1 ml of ammonia solution with a mass concentration of 30% to the ethanol solution of tetrabutyl titanate prepared in step 1), precipitate, filter, and wash to obtain a precipitate of titanium oxyhydroxide;

[0033] 3) Weigh 1.058g of strontium nitrate, add it to 10ml of deionized water, and magnetically stir until dissolved;

[0034] 4) Weigh 0.016g of polyvinyl alcohol, add it into 10ml of deionized water, heat, and magnetically stir until dissolved;

[0035] 5) The oxyhydroxide precipitation of titanium, the aqueous solution of strontium nitrate, the aqueous solution of polyvinyl alcohol and 1.710g of potassium hydroxide solids are added in the reaction kettle liner with a volume of 60ml, and the volume of the precursor slurry is adjusted with deionized water to 80% of the volume of the inner tank of the reaction kettle, s...

Embodiment 3

[0038] 1) Weigh 0.340g of tetrabutyl titanate, add it to 10ml of absolute ethanol, and magnetically stir until dissolved;

[0039] 2) Under stirring, add 1 ml of ammonia solution with a mass concentration of 30% to the ethanol solution of tetrabutyl titanate prepared in step 1), precipitate, filter, and wash to obtain a precipitate of titanium oxyhydroxide;

[0040] 3) Weigh 0.106g of strontium nitrate, add it into 10ml of deionized water, and magnetically stir until dissolved;

[0041] 4) Weigh 0.016g of polyvinyl alcohol, add it into 10ml of deionized water, heat, and magnetically stir until dissolved;

[0042] 5) The oxyhydroxide precipitation of titanium, the aqueous solution of strontium nitrate, the aqueous solution of polyvinyl alcohol and 1.710g of potassium hydroxide solids are added in the reaction kettle liner with a volume of 60ml, and the volume of the precursor slurry is adjusted with deionized water to 80% of the volume of the inner tank of the reaction kettle,...

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Abstract

The invention discloses a method for preparing strontium titanate nanometer powder with one-dimension structure, which consists of procedures of preparing the oxyhydroxide precipitate of titanium and the deionized aqueous solution of barium acetate as reaction materials, adding a feasible quantity of potassium hydroxide to promote crystallization, and appending a suitable viscosity of patterned vertical alignment polymer surfactant to control the feature; under the temperature of 100-150 DEG C, strontium titanate nanowire and a branched crystal structure are obtained after a hydrothermal reaction. The craftwork of the invention is simple; the micro feature of the product is easy to control, the pollution is free; the cost is low; a large-scale production is suitable. The quality of the crystallization of the prepared product is stable; the specific surface is big. A broad application prospect is possessed in fields of micro electronic devices, EO devices, storage devices, oxygen sensors, photocatalyst, and solar battery, etc.

Description

technical field [0001] The invention relates to a preparation method of strontium titanate nanopowder with one-dimensional structure, belonging to the field of inorganic non-metallic materials. Background technique [0002] Due to the quantum size effect, nanomaterials have better physical and chemical properties than bulk materials, and their preparation is also a focus of attention and research in materials science in recent years. At the same time, the microscopic shape and size of the material determine the performance of the material. For example, nanotubes, nanowires, nanorods and nanoribbons with one-dimensional structures show excellent electrical, optical and magnetic properties, and more and more Many researchers have focused their attention on the control of the microscopic morphology of materials. [0003] Strontium titanate is an important ABO 3 Type perovskite oxides are widely used in the electronic ceramic industry due to their high dielectric constant, hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/32C30B29/62C30B7/10
Inventor 韩高荣魏晓徐刚翁文剑杜丕一赵高凌张溪文沈鸽
Owner ZHEJIANG UNIV
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