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A kind of sodium bismuth titanate nanotube and preparation method thereof

A technology of sodium bismuth titanate and nanotubes, applied in nanotechnology, chemical instruments and methods, bismuth compounds, etc., can solve the difficult piezoelectric coefficient of one-dimensional lead-free piezoelectric materials, incompatibility with high aspect ratio, and complicated process etc. to achieve the effects of low cost, improved piezoelectric performance, and larger specific surface area

Active Publication Date: 2021-10-08
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To sum up, the one-dimensional lead-free piezoelectric material prepared by a single template method is difficult to approach the piezoelectric coefficient of the lead-containing piezoelectric material, and the method still has high cost, complicated process, and incompatibility with high aspect ratio and precision. Technical issues such as controlling wall thickness

Method used

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  • A kind of sodium bismuth titanate nanotube and preparation method thereof
  • A kind of sodium bismuth titanate nanotube and preparation method thereof
  • A kind of sodium bismuth titanate nanotube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] Step 1: Prepare NBT precursor solution

[0115] (1) Weigh 1.078g Bi(NO 3 ) 3 ·5H 2 O dissolved in 15 mL CH 3 OCH 2 CH 2 OH and magnetically stirred, recorded as A solution, its mass volume ratio is 0.072g / mL;

[0116] (2) Weigh 0.166g CH 3 COONa was dissolved in 3 mL CH 3 COOH and stirred evenly, recorded as B solution, its mass volume ratio is 0.055g / mL;

[0117] (3) Add solution B to solution A dropwise, and magnetically stir the resulting mixed solution for 20 minutes;

[0118] (4) Add 1.375g Ti(OC 4 h 9 ) 4 , 1mL CH 3 COCH 2 COCH 3 , stirred at room temperature for 2h to obtain a uniformly mixed precursor solution, see the accompanying drawings of the present invention figure 1 ;

[0119] above CH 3 COONa, Bi(NO 3 ) 3 Aqueous solution, Ti(OC 4 h 9 ) 4 Amount of aqueous solution, according to CH 3 COONa: Bi(NO 3 ) 3 : Ti(OC 4 h 9 ) 4 The molar ratio is calculated as the ratio of 1:1:2;

[0120] Step 2: Swirl

[0121] Soak the AAO templat...

Embodiment 2

[0124] A preparation method of NBT nanotube array, comprising the steps of:

[0125] The other conditions are the same as in Example 1, only step 2 uses AAO template (template pore size is 110nm), repeats the steps of suction filtration and spin coating for 4 times, and finally obtains an NBT nanotube array with a diameter of about 110nm.

Embodiment 3

[0127] A preparation method of NBT nanotube array, comprising the steps of:

[0128] Other conditions are the same as in Example 1, only the AAO template is used in step 2 (the pore size of the template is 30nm), and the steps of repeated suction filtration and spin coating are 2 times, and the AAO template containing the sol needs to be placed in a muffle after the first repetition of the steps The annealing process is carried out in the furnace. The annealing process parameters are as follows: the temperature is raised from room temperature to 175°C, and the temperature is kept for 2 minutes;

[0129] In summary, the present invention provides a high-voltage electric coefficient sodium bismuth titanate nanotube and a preparation method thereof. By comparing the formation mechanism of NBT nanotube arrays prepared by different filling methods, a high filling rate and a large aspect ratio are found. 1. The preparation method of NBT nanotube arrays with precisely controlled wall...

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Abstract

The invention discloses a sodium bismuth titanate nanotube and a preparation method thereof. The sodium bismuth titanate nanotube has a stripe domain structure, the stripe domains are alternately arranged along the length direction of the bismuth sodium titanate nanotube, and the width of the stripe domain is 10-50nm. The regular stripe domain structure can effectively improve the piezoelectric coefficient of sodium bismuth titanate nanotubes, and its piezoelectric coefficient is close to that of lead-containing perovskite materials. The preparation method comprises the following steps: (1) preparing sodium bismuth titanate precursor solution (2) synthesizing bismuth sodium titanate nanotubes by a pumping method. The method can simply prepare the sodium bismuth titanate nanotube array with controllable size and uniform wall thickness.

Description

technical field [0001] The invention relates to a sodium bismuth titanate nanotube and a preparation method thereof, belonging to the technical field of inorganic non-metallic materials. Background technique [0002] Due to the characteristics of small volume and large specific surface area, one-dimensional piezoelectric materials have broad application prospects in the fields of ferroelectric random access memory (FRAM), nanoelectromechanical systems, and energy harvesters. With the development concept of green environmental protection and the rapid development of microelectronics industry integration, the preparation and application research of one-dimensional lead-free piezoelectric materials has gradually become a hot spot in the scientific community. The preparation of one-dimensional lead-free piezoelectric materials is not only to observe its structure, but more importantly to study its performance and device applications, so the exploration of preparation methods is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G29/00B82Y40/00
CPCB82Y40/00C01G29/006C01P2002/72C01P2002/85C01P2004/01C01P2004/03C01P2004/13
Inventor 朱哲李俊鹏
Owner XIANGTAN UNIV
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