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Method for quickly preparing cubic sodium bismuth titanate at low temperature

A cubic sodium bismuth titanate, rapid technology, applied in the direction of titanate, chemical instruments and methods, titanium compounds, etc., can solve the problems of difficulty in obtaining fine particles, high sintering temperature of samples, poor ceramic compactness, etc., and achieve reaction The effect of shortening the time, uniform particle distribution and reducing agglomeration

Active Publication Date: 2017-08-18
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Most of the preparation of NBT is prepared by the traditional solid-phase method, which is relatively simple and suitable for large-scale production. However, the traditional solid-phase method has high synthesis temperature, easy agglomeration and difficulty in obtaining finer particles. Simultaneously fired ceramics Poor compactness, high sintering temperature of the sample and excessive recrystallization cannot meet the requirements of high-tech fields

Method used

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  • Method for quickly preparing cubic sodium bismuth titanate at low temperature
  • Method for quickly preparing cubic sodium bismuth titanate at low temperature

Examples

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example 1

[0033] A kind of method for rapidly preparing cubic sodium bismuth titanate powder under low temperature of the present invention comprises the following steps,

[0034] (1) configure NaOH clear solution, in the solution, the concentration of NaOH is 12mol / L;

[0035] (2) Configure Bi(NO 3 ) 3 ·5H 2 O solution, in solution, Bi(NO 3 ) 3 ·5H 2 The concentration of O is 0.1mol / L, and an appropriate amount of nitric acid is dropped into the solution, and the stirring is continued until Bi(NO 3 ) 3 ·5H 2 O completely dissolves, and obtains clear solution A; Used nitric acid is 1ml in this preferred example;

[0036] (3) Use a pipette to transfer Ti(OC 4 h 9 ) 4 Added dropwise into clear solution A to obtain mixed solution B, in which Ti(OC 4 h9 ) 4 and Bi(NO in step (2) 3 ) 3 ·5H 2 The molar ratio of O is 1:1;

[0037] (4) After the mixed solution B in the step (3) is magnetically stirred, then the NaOH clarified solution is added dropwise to the mixed solution B, ...

example 2

[0041] A kind of method for rapidly preparing cubic sodium bismuth titanate powder under low temperature of the present invention comprises the following steps,

[0042] (1) configure NaOH clear solution, in the solution, the concentration of NaOH is 14mol / L;

[0043] (2) Configure Bi(NO 3 ) 3 ·5H 2 O solution, in solution, Bi(NO 3 ) 3 ·5H 2 The concentration of O is 0.2mol / L, and an appropriate amount of nitric acid is dropped into the solution, and the stirring is continued until Bi(NO 3 ) 3 ·5H 2 O dissolves completely, obtains clear solution A; Used nitric acid is 2ml in this preferred example;

[0044] (3) Use a pipette to transfer Ti(OC 4 h 9 ) 4 Added dropwise into clear solution A to obtain mixed solution B, in which Ti(OC 4 h 9 ) 4 and Bi(NO in step (2) 3 ) 3 ·5H 2 The molar ratio of O is 1:1.5;

[0045] (4) After the mixed solution B in the step (3) is magnetically stirred, then the NaOH clarified solution is added dropwise to the mixed solution B, ...

example 3

[0049] The present invention rapidly prepares cubic Na at a low temperature 0.5 Bi 0.5 TiO 3 The method for the powder comprises the following steps, (1) configuring NaOH clarified solution, in the solution, the concentration of NaOH is 15mol / L;

[0050] (2) Configure Bi(NO 3 ) 3 ·5H 2 O solution, in solution, Bi(NO 3 ) 3 ·5H 2 The concentration of O is 0.1mol / L, and an appropriate amount of nitric acid is dropped into the solution, and the stirring is continued until Bi(NO 3 ) 3 ·5H 2 O dissolves completely, obtains clear solution A; Used nitric acid is 1.5ml in this preferred example;

[0051] (3) Use a pipette to transfer Ti(OC 4 h 9 ) 4 Added dropwise into clear solution A to obtain mixed solution B, in which Ti(OC 4 h 9 ) 4 and Bi(NO in step (2) 3 ) 3 ·5H 2 The molar ratio of O is 3:4;

[0052] (4) After the mixed solution B in the step (3) is magnetically stirred, then the NaOH clarified solution is added dropwise to the mixed solution B, and then sti...

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Abstract

The invention provides a method for quickly preparing cubic sodium bismuth titanate at low temperature. The method comprises the following steps that firstly, a NaOH clear solution with the concentration of 10-16 mol / L is prepared; secondly, a Bi(NO3)3 5H2O solution at the concentration of 0.1-0.2 mol / L is prepared, and a clear solution A is obtained; thirdly, Ti(OC4H9) is dropwise added into the clear solution A, and a mixed solution B is obtained after stirring; fourthly, the NaOH clear solution is dropwise added into the mixed solution B and stirred and mixed evenly, and a Na0.5Bi0.5TiO3 precursor solution is obtained; fifthly, the Na0.5Bi0.5TiO3 precursor solution is subjected to a microwave hydrothermal reaction; sixthly, after the microwave hydrothermal reaction is finished and the reaction product is cooled to the room temperature, sediment obtained after the reaction is washed, dried at a constant temperature and screened, and then the cubic Na0.5Bi0.5TiO3 powder is obtained.

Description

technical field [0001] The invention relates to a powder preparation technology by a wet chemical method, in particular to a method for rapidly preparing cubic sodium bismuth titanate powder at low temperature. Background technique [0002] Piezoelectric ceramics, as an important functional ceramic material, are widely used in machinery, electronics, aerospace and other fields. At present, the piezoelectric ceramics used are mainly concentrated in lead-based materials, and the content of PbO in this material accounts for about 70% of the total material. PbO is a harmful substance, which is harmful to the environment and human body during the preparation, use and disposal of materials. Therefore, the development of new lead-free piezoelectric ceramics with excellent performance and in harmony with the environment has become an urgent research topic with great practical significance. Sodium bismuth titanate (Na 0.5 Bi 0.5 TiO 3 )(NBT) is a kind of ferroelectric material w...

Claims

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Application Information

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IPC IPC(8): C01G23/00
CPCC01G23/003C01P2002/72C01P2004/03C01P2004/61
Inventor 王卓念雯雯王添肖雨佳陈浩楠王枭颖
Owner SHAANXI UNIV OF SCI & TECH
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