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Method for preparing sodium bismuth titanate nanometer sheet

A technology of sodium bismuth titanate and nanosheets, which is applied in nanostructure manufacturing, nanotechnology, nanotechnology and other directions, can solve problems such as large environmental pollution, and achieve the effects of no environmental pollution, simple equipment and high purity

Inactive Publication Date: 2013-08-21
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The research on piezoelectric ceramics mainly focuses on the traditional bismuth zirconate titanate material, one of the main components of which is a volatile toxic substance PbO, which causes great environmental pollution.

Method used

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  • Method for preparing sodium bismuth titanate nanometer sheet
  • Method for preparing sodium bismuth titanate nanometer sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Titanium sulfate is dissolved in 0.3wt% dilute nitric acid solution to adjust the Ti in the solution 4+ The ion concentration is 0.2mol / L;

[0021] 2) Under stirring, add an aqueous sodium hydroxide solution to the dilute nitric acid solution of titanium sulfate prepared in step 1), so that the pH value of the solution is 14, filter and wash the obtained precipitate, and obtain a titanium oxyhydroxide precipitate;

[0022] 3) dissolving bismuth nitrate in distilled water to form an aqueous solution of bismuth nitrate, adjusting the concentration of bismuth ions in the solution to be 0.2mol / L;

[0023] 4) Under stirring state, add aqueous sodium hydroxide solution to the bismuth nitrate aqueous solution prepared in step 3), make the pH value of the solution 14, filter and wash the precipitate obtained to obtain the oxyhydroxide precipitation of bismuth;

[0024] 5) The oxyhydroxide precipitation of titanium and bismuth, sodium hydroxide are added in the reactor liner...

Embodiment 2

[0027] 1) Titanium sulfate is dissolved in 0.3wt% dilute nitric acid solution to adjust the Ti in the solution 4+ The ion concentration is 0.5mol / L;

[0028] 2) Under stirring, add an aqueous sodium hydroxide solution to the dilute nitric acid solution of titanium sulfate prepared in step 1), so that the pH value of the solution is 14, filter and wash the obtained precipitate, and obtain a titanium oxyhydroxide precipitate;

[0029] 3) dissolving bismuth nitrate in distilled water to form an aqueous solution of bismuth nitrate, adjusting the concentration of bismuth ions in the solution to be 0.6mol / L;

[0030] 4) Under stirring state, add aqueous sodium hydroxide solution to the bismuth nitrate aqueous solution prepared in step 3), make the pH value of the solution 14, filter and wash the precipitate obtained to obtain the oxyhydroxide precipitation of bismuth;

[0031] 5) The oxyhydroxide precipitation of titanium and bismuth, sodium hydroxide are added in the reactor liner...

Embodiment 3

[0034] 1) Titanium sulfate is dissolved in 0.3wt% dilute nitric acid solution to adjust the Ti in the solution 4+ The ion concentration is 0.7mol / L;

[0035] 2) Under stirring, add an aqueous sodium hydroxide solution to the dilute nitric acid solution of titanium sulfate prepared in step 1), so that the pH value of the solution is 14, filter and wash the obtained precipitate, and obtain a titanium oxyhydroxide precipitate;

[0036] 3) dissolving bismuth nitrate in distilled water to form an aqueous solution of bismuth nitrate, adjusting the concentration of bismuth ions in the solution to be 0.4mol / L;

[0037] 4) Under stirring, add aqueous sodium hydroxide solution to the bismuth nitrate aqueous solution prepared in step 3), so that the pH value of the solution is 14, filter and wash the obtained precipitate, and obtain a bismuth oxyhydroxide precipitate;

[0038] 5) The oxyhydroxide precipitation of titanium and bismuth, sodium hydroxide are added in the reactor liner, the...

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Abstract

A method for preparing sodium bismuth titanate nanometer sheet includes: preparing oxyhydroxide sediments of titanium and bismuth as reaction materials, adding sodium hydroxide with proper concentration for promoting crystallization, leading sodium nitrate in a hydrothermal system for controlling growth of crystal, and obtaining the sodium bismuth titanate nanometer sheet through hydrothermal reaction with water as the solvent at temperature of 120 DEG C to 200 DEG C. The method achieves synthesis of the sodium bismuth titanate nanometer sheet for the first time and is simple in technologicalprocess, size of the nanometer sheet is easy to control, cost is low, organic surface active agents and the like are not adopted, pollution is zero, and large-scale production can be achieved easily.The products for preparing the sodium bismuth titanate nanometer sheet has wide application prospect in fields of detectors, transducers, transformers, electro-optical devices and the like.

Description

technical field [0001] The invention relates to a preparation method of sodium bismuth titanate nanosheets, belonging to the field of inorganic non-metallic materials. Background technique [0002] Piezoelectric ceramics are functional materials with piezoelectric effect, which can realize functions such as energy conversion, sensing, driving, and frequency control. The research on piezoelectric ceramics mainly focuses on the traditional bismuth zirconate titanate material, one of its main components is PbO, a volatile toxic substance, which pollutes the environment greatly. Sodium bismuth titanate (Na 0.5 Bi 0.5 TiO 3 ) is a typical ABO 3 type perovskite structure with a Curie temperature of 320 o C, at room temperature has a larger remnant polarization Pr (38uC / cm 2 ), considered to be the most promising bismuth-free piezoelectric ceramic material to replace bismuth zirconate titanate. [0003] Nanocrystalline materials with special morphology often exhibit some exc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B82B3/00C04B35/475C04B35/626
Inventor 杨琳琳王永刚徐国辉王玉江王晓峰林海燕罗伟
Owner LUOYANG INST OF SCI & TECH
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