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Method for preparing nano barium strontium titanate powder by adopting sol-gel method

A technology of nano-titanium and gel method, which is applied in the direction of nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problem of uneven particle size distribution of barium strontium titanate powder, and achieve the effect of uniform particle size distribution

Inactive Publication Date: 2010-08-04
JIANGSU JUXIN MAGNET +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiency of uneven particle size distribution of strontium barium titanate powder prepared by the prior art method, the present invention provides a kind of adopting sol-gel method to prepare nano-titanium The method of strontium barium titanate powder, by improving the existing sol-gel method and precisely controlling the preparation parameters, can prepare nano strontium barium titanate powder with uniform particle size distribution

Method used

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  • Method for preparing nano barium strontium titanate powder by adopting sol-gel method
  • Method for preparing nano barium strontium titanate powder by adopting sol-gel method
  • Method for preparing nano barium strontium titanate powder by adopting sol-gel method

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Effect test

Embodiment 1

[0014] Example 1, 1 mol of strontium hydroxide was added to 300 ml of glacial acetic acid, heated and dissolved in a water bath at 80° C. with stirring. After the solution turns into a clear solution, add 1.5 mol of barium acetate. Then add 600ml ethylene glycol methyl ether solution as a solvent, and stir for 10min. 7.5 mol of tetra-n-butyl titanate was weighed and added dropwise to the solution, and after stirring for half an hour, 150 ml of acetylacetone was slowly added. Then heated and stirred at 80° C. for 3 h. Finally, 50ml of deionized water was added. The amount of deionized water added was preferably such that the color of the solution turned into an orange sol. Stir and heat at the same temperature to obtain a BST gel. The obtained BST gel was dried at 120°C, ground and sieved, and then heat-treated at 750°C for 5 hours at a heating rate of 1°C / min to synthesize a pure-phase BST nanopowder.

[0015] The surface morphology and phase of the prepared BST nanopowder ...

Embodiment 2

[0019] Example 2, 2 mol of strontium hydroxide was added to 400 ml of glacial acetic acid, heated and dissolved in a 60° C. water bath with stirring. After the solution turns into a clear solution, add 3 mol of barium acetate. Then add 800ml ethylene glycol methyl ether solution as a solvent, and stir for 15min. Weigh 15 mol of tetra-n-butyl titanate and add it dropwise into the solution, and after stirring for 20 min, slowly add 200 ml of acetylacetone. Then heated and stirred at 70°C for 4h. Finally, 50ml of deionized water was added. The amount of deionized water added was preferably such that the color of the solution turned into an orange sol. Stir and heat at the same temperature to obtain a BST gel. The obtained BST gel was dried at 115°C, ground and sieved, and then heat-treated at 800°C for 4 hours at a heating rate of 4°C / min to synthesize a pure-phase BST nanopowder. The surface morphology and phase of the samples were analyzed and characterized by Hitach S-530 s...

Embodiment 3

[0023] Example 3, 3 mol of strontium hydroxide was added to 500 ml of glacial acetic acid, heated and dissolved in a 70° C. water bath with stirring. After the solution turns into a clear solution, add 4.5 mol of barium acetate. Then add 1000ml ethylene glycol methyl ether solution as a solvent, and stir for 8min. Weigh 22.5 mol of tetra-n-butyl titanate and add it dropwise into the solution. After stirring for 15 min, slowly add 250 ml of acetylacetone. Then heated and stirred at 90 °C for 1 h. Finally, 50ml of deionized water was added. The amount of deionized water added was preferably such that the color of the solution turned into an orange sol. Stir and heat at the same temperature to obtain a BST gel. The obtained BST gel was dried at 110°C, ground and sieved, and then heat-treated at 850°C for 3 hours at a heating rate of 3°C / min to synthesize a pure-phase BST nanopowder. The surface morphology and phase of the samples were analyzed and characterized by Hitach S-530...

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Abstract

The invention discloses a method for preparing nano barium strontium titanate powder by adopting a sol-gel method, which is mainly used for solving the technical problem that barium strontium titanate powder prepared by a traditional preparation method has uneven particle size distribution. In a technical scheme, the nano barium strontium titanate powder is prepared from barium acetate, strontium hydroxide, tetra-n-butyl titanate, glacial acetic acid, ethylene glycol monomethyl ether and acetylacetone by adopting the sol-gel method. Because the traditional sol-gel method is improved and preparation parameters are accurately controlled, the barium strontium titanate (BST) nano-powder with even particle size distribution is obtained.

Description

technical field [0001] The invention relates to a method for preparing barium strontium titanate (hereinafter referred to as BST) powder, in particular to a method for preparing nano barium strontium titanate powder by using a sol-gel method. Background technique [0002] Document "Tao Hu, Heli Jantunen, Antti Uusimaki, Seppo Leppavuori, BST powder with sol-gel process in tape casting and firing, Journal of the European Ceramic Society 24 (2004) 1111-1116" discloses a method using sol-gel process The method of preparing nano strontium barium titanate powder, the sol made of Ba, Sr, Ti salt solution is dried to obtain BST powder, although the BST powder in the submicron scale range is obtained, but the SEM characterization shows that the powder The particle size distribution is uneven, so the purpose of large-scale industrial production and use cannot be reached. Contents of the invention [0003] In order to overcome the deficiency of uneven particle size distribution of ...

Claims

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Application Information

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IPC IPC(8): C01G23/00B82B3/00
Inventor 樊慧庆
Owner JIANGSU JUXIN MAGNET
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