SrTiO3 nanometer material preparation method

A nanomaterial, ethylene glycol technology, used in chemical instruments and methods, inorganic chemistry, titanium compounds, etc., can solve the problems of long synthesis time and long reaction process, and achieve narrow particle size distribution, easy operation, and fine particles. Effect

Inactive Publication Date: 2018-10-26
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the general sol-gel method to prepare SrTiO 3 For powder, absolute ethanol is often used, an...

Method used

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  • SrTiO3 nanometer material preparation method
  • SrTiO3 nanometer material preparation method
  • SrTiO3 nanometer material preparation method

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Experimental program
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Effect test

Embodiment 1

[0021] A SrTiO 3 The preparation method of nanometer material specifically comprises the following steps:

[0022] (1) Dissolve citric acid, butyl titanate, and strontium chloride hexahydrate in 50mL of methanol, and add ethylene glycol as a dispersant at the same time to obtain a mixed solution. The amount of citric acid added to the mixed solution is 13.7432g, The added amount of butyl titanate was 3.7852 g, the added amount of strontium chloride hexahydrate was 2.9207 g, and the added amount of ethylene glycol was 3 mL.

[0023] (2) Foam the mixed solution obtained in step (1) at 90°C to form a gel, heat the reaction until no precipitation is formed during the foaming and forming process, and the time required for forming the gel is 20 minutes.

[0024] (3) Dry the colloid obtained in step (2) (dried at 180°C for 1 hour) to obtain a xerogel; the obtained xerogel is calcined (calcined at 800°C for 5 hours) to obtain SrTiO 3 Material.

[0025] The SrTiO prepared in this em...

Embodiment 2

[0028] A SrTiO 3 The preparation method of nanometer material specifically comprises the following steps:

[0029] (1) Dissolve citric acid, butyl titanate, and strontium chloride hexahydrate in 50mL of methanol, and add ethylene glycol as a dispersant at the same time to obtain a mixed solution. The amount of citric acid added to the mixed solution is 13.7432g, The added amount of butyl titanate was 3.7852 g, the added amount of strontium chloride hexahydrate was 2.9207 g, and the added amount of ethylene glycol was 3 mL.

[0030] (2) Foam the mixed solution obtained in step (1) at 80°C to form a gel, heat the reaction until no precipitation is formed during the foaming and forming process, and the time required for forming the gel is 25 minutes.

[0031] (3) Dry the colloid obtained in step (2) (dried at 190°C for 1 hour) to obtain a dry gel; the obtained dry gel is calcined (calcined at 900°C for 3.5 hours) to obtain SrTiO 3 Material.

[0032] The SrTiO prepared in this ...

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Abstract

The invention discloses an SrTiO3 nanometer material preparation method and belongs to the field of functional materials. The SrTiO3 nanometer material preparation method comprises the following stepsof by adopting methanol as a solvent, adding chemical raw materials including citric acid, strontium chloride hexahydrate and butyl titanate in the methanol solvent, stirring and dissolving to obtaina mixed solution, and performing gel formation, drying and calcining treatment on the solution to obtain a strontium titanate material with excellent performance. For the preparation method providedby the invention, by adopting the methanol as the solvent, the method is simple in technological process, obtained strontium titanate is stable in quality, high in purity and good in uniformity, the preparation period is greatly shortened, and the production efficiency is improved at the same time.

Description

technical field [0001] The present invention relates to a kind of SrTiO 3 The invention relates to a method for preparing nanometer materials, which belongs to the field of functional materials. Background technique [0002] Strontium titanate (SrTiO 3 ) has a typical perovskite structure and is a widely used electronic functional ceramic material in the electronics industry. It has the advantages of high dielectric constant, low dielectric loss, and good thermal stability. It is widely used in high-voltage capacitors, voltage Sensitive resistors, thermistors and other fields, with high performance, high reliability, small size and other characteristics. As a functional material, SrTiO 3 It has the characteristics of high band gap, excellent photocatalytic activity, etc., and has unique electromagnetic properties and redox catalytic activity. Strontium titanate has gradually become an attractive functional material with broad application prospects. [0003] Currently, s...

Claims

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Application Information

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IPC IPC(8): C01G23/00
Inventor 张辉兖凯凯
Owner KUNMING UNIV OF SCI & TECH
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