Preparation method of barium titanate hollow nanospheres

A technology of hollow nanometer and barium titanate, applied in the direction of preparation of microspheres, chemical instruments and methods, titanium compounds, etc., can solve the problems of complex reaction procedures, long reaction time, and small amount of products, and achieve simple production process, size and Uniform shape and low cost

Active Publication Date: 2010-12-29
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has defects such as complex reaction procedure, long reaction time, small amount of product, low yield, high cost, etc.

Method used

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  • Preparation method of barium titanate hollow nanospheres
  • Preparation method of barium titanate hollow nanospheres
  • Preparation method of barium titanate hollow nanospheres

Examples

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Effect test

example 1

[0019] 1) Add 5mL of n-butanol and 45mL of absolute ethanol to a 250mL reaction flask successively, then add 1.701g of tetrabutyl titanate and stir for 10 minutes;

[0020] 2) Weigh 1.314g barium chloride dihydrate and dissolve it in 10mL deionized water;

[0021] 3) Weigh 24.500g of sodium hydroxide and dissolve in 50mL of deionized water;

[0022] 4) under agitation, add step 2) to the reaction flask in step 1) prepared Ba 2+ Ionic solution; after stirring for 30 minutes, add the sodium hydroxide solution obtained in step 3) again; continue stirring for 30 minutes;

[0023] 5) Under stirring, the temperature of the reaction system in step 4) was raised to 70° C. and maintained for 12 hours;

[0024] 6) Stop stirring, allow the product obtained in step 5) to settle naturally, pour out the upper layer solution, and wash the precipitate three times in the order of deionized water, dilute formic acid solution with a volume concentration of 0.5%, and deionized water, and then p...

example 2

[0026] 1) Add 2mL of n-butanol and 40mL of absolute ethanol to a 250mL reaction flask successively, then add 1.698g of tetrabutyl titanate, and stir for 10 minutes;

[0027] 2) Weigh 1.650g of barium hydroxide octahydrate and dissolve it in 10mL of deionized water;

[0028] 3) Weigh 22.000g of sodium hydroxide and dissolve in 50mL of deionized water;

[0029] 4) under agitation, add step 2) to the reaction flask in step 1) prepared Ba 2+ Ionic solution; after stirring for 30 minutes, add the sodium hydroxide solution obtained in step 3) again; continue stirring for 30 minutes;

[0030] 5) Under stirring, the reaction system in step 4) was heated to 100° C., and kept under reflux for 8 hours;

[0031] 6) Stop stirring, allow the product obtained in step 5) to settle naturally, pour out the upper layer solution, and wash the precipitate three times in the order of deionized water, dilute formic acid solution with a volume concentration of 0.9%, and deionized water, and then pl...

example 3

[0033] 1) Add 10mL of n-butanol and 40mL of absolute ethanol to a 250mL reaction flask successively, then add 4.563g of tetraethyl titanate and stir for 10 minutes;

[0034] 2) Weigh 5.292g barium nitrate and dissolve it in 10mL deionized water;

[0035] 3) Weigh 40.000g potassium hydroxide and dissolve in 50mL deionized water;

[0036] 4) under agitation, add step 2) to the reaction flask in step 1) prepared Ba 2+ Ionic solution; after stirring for 30 minutes, add the potassium hydroxide solution obtained in step 3) again; continue to stir for 30 minutes;

[0037] 5) Under stirring, the temperature of the reaction system in step 4) was raised to 60° C. and maintained for 20 hours;

[0038] 6) Stop stirring, allow the product obtained in step 5) to settle naturally, pour out the upper layer solution, and wash the precipitate three times in the order of deionized water, dilute acetic acid solution with a volume concentration of 0.9%, and deionized water, and then place the pr...

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Abstract

The invention relates to a preparation method of barium titanate hollow nanospheres. The method adopts an improved direct precipitation method and comprises the following steps: preparing a mixture of titanium salts and n-butyl alcohol/ethanol of a certain proportion and a barium ion solution as reaction materials, adding alkali liquor of a appropriate concentration to promote crystallization, and carrying out low-temperature heating reaction, thus obtaining the barium titanate hollow nanosphere powder with good dispersity. The prepared product is pure cubic crystal phase and has the appearance of the hollow nanospheres, and the granular size and the appearance are uniform.

Description

technical field [0001] The invention relates to a method for preparing barium titanate hollow nanospheres, belonging to the field of inorganic non-metallic materials. Background technique [0002] Barium titanate is a typical ferroelectric and dielectric material. Due to its superior dielectric, piezoelectric, and ferroelectric properties, barium titanate has been widely used in the preparation of ceramic capacitors, microwave devices, ferroelectric memories, temperature sensors, nonlinear rheostats, thermistors, ultrasonic vibrators, and honeycomb heating Body and other electronic devices. Under the current trend of miniaturization and high integration of electronic components, the quality requirements of barium titanate powder are getting higher and higher. Smaller particle size and more uniform size and shape have become the primary pursuit goals in the preparation process. For example, the use of nano-barium titanate powder to make multilayer capacitors can significant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00B01J13/02
Inventor 陈玉标陈玲吴立明
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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