Method for preparing perovskite structure lead titanate monocrystal nano rod

A technology of perovskite structure and single crystal nanometer, which is applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the problem of difficult one-dimensional nanostructure preparation, small structural anisotropy, and difficult orientation growth and other issues, to achieve the effect of easy large-scale production, low cost and easy control

Inactive Publication Date: 2010-01-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Perovskite structure oxides with ferroelectric properties are generally tetragonal or rhombohedral. Due to the small structural

Method used

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  • Method for preparing perovskite structure lead titanate monocrystal nano rod
  • Method for preparing perovskite structure lead titanate monocrystal nano rod
  • Method for preparing perovskite structure lead titanate monocrystal nano rod

Examples

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Effect test

example 1

[0021] 1) According to the chemical formula PbTiO of the lead titanate single crystal nanorods to be synthesized 3 Measure and weigh titanium sulfate and lead nitrate and dissolve them in deionized water to prepare Ti 4+ Titanium sulfate aqueous solution and Pb with an ion concentration of 0.3 mol / L 2+ An aqueous solution of lead nitrate with an ion concentration of 0.1 mol / L.

[0022] 2) Take the amount of titanium sulfate and lead nitrate in the titanium sulfate aqueous solution and lead nitrate aqueous solution prepared in step 1) as the base, and measure the chemical reaction of titanium sulfate, lead nitrate and potassium hydroxide to form titanium hydroxide and lead hydroxide, Weigh potassium hydroxide and dissolve it in deionized water to prepare a potassium hydroxide aqueous solution with a concentration of 0.2 mol / L.

[0023] 3) While stirring, first add the titanium sulfate aqueous solution and the lead nitrate aqueous solution prepared in step 1) dropwise to the potassium...

example 2

[0026] 1) According to the chemical formula PbTiO of the lead titanate single crystal nanorods to be synthesized 3 Measure and weigh titanium sulfate and lead nitrate and dissolve them in deionized water to prepare Ti 4+ Titanium sulfate aqueous solution and Pb with an ion concentration of 0.1 mol / L 2+ Lead nitrate aqueous solution with an ion concentration of 0.3 mol / L.

[0027] 2) Take the amount of titanium sulfate and lead nitrate in the titanium sulfate aqueous solution and lead nitrate aqueous solution prepared in step 1) as the base, and measure the chemical reaction of titanium sulfate, lead nitrate and potassium hydroxide to form titanium hydroxide and lead hydroxide, Weigh potassium hydroxide and dissolve it in deionized water to prepare a potassium hydroxide aqueous solution with a concentration of 0.6 mol / L.

[0028] 3) While stirring, first add the titanium sulfate aqueous solution and the lead nitrate aqueous solution prepared in step 1) dropwise to the potassium hydro...

example 3

[0031] 1) According to the chemical formula PbTiO of the lead titanate single crystal nanorods to be synthesized 3 Measure and weigh titanium sulfate and lead nitrate and dissolve them in deionized water to prepare Ti 4+ Titanium sulfate aqueous solution and Pb with an ion concentration of 0.2mol / L 2+ Lead nitrate aqueous solution with ion concentration of 0.2mol / L.

[0032] 2) Take the amount of titanium sulfate and lead nitrate in the titanium sulfate aqueous solution and lead nitrate aqueous solution prepared in step 1) as the base, and measure the chemical reaction of titanium sulfate, lead nitrate and potassium hydroxide to form titanium hydroxide and lead hydroxide, Weigh potassium hydroxide and dissolve it in deionized water to prepare an aqueous potassium hydroxide solution with a concentration of 0.4 mol / L.

[0033] 3) While stirring, first add the titanium sulfate aqueous solution and the lead nitrate aqueous solution prepared in step 1) dropwise to the potassium hydroxide...

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Abstract

The invention relates to a method for preparing a perovskite structure lead titanate monocrystal nano rod. A titanium and lead oxyhydroxide mixed sediment for hydrothermal reaction is prepared by a two-step precipitation method. The method comprises the following steps: taking titanium sulfate as a raw material for precipitating titanium, taking lead nitrate as a raw material for precipitating lead and taking potassium hydroxide as a precipitating agent; precipitating titanium ions; precipitating lead ions; after the product is filtered and washed, obtaining the mixed sediment containing the titanium ions and the lead ions; mixing and dispersing the mixed sediment and the potassium hydroxide in deionized water; sealing the mixture in a reaction kettle; and carrying out hydro-thermal treatment at 160-240 DEG C for 5-48 hours to obtain the perovskite structure lead titanate monocrystal nano rod. The invention has simple technology process, no pollution and low cost and is easy to control and carry out mass production.

Description

Technical field [0001] The invention relates to a method for preparing a lead titanate nanorod with a perovskite structure, which belongs to the field of inorganic non-metallic materials. Background technique [0002] Compared with its corresponding bulk materials, nanomaterials show many special properties, and the advancement of science and technology and the miniaturization of electronic devices have also put forward more and more requirements for nanomaterials. Therefore, the synthesis and performance research of nanostructured materials has attracted more and more interest and attention. [0003] Lead titanate is a typical ferroelectric material with a perovskite structure, and the Curie temperature of its ferroelectric phase transition is 490℃. Due to its excellent ferroelectric, piezoelectric and dielectric properties, lead titanate has a wide range of applications in the preparation of microelectronic devices such as non-volatile ferroelectric memory, piezoelectric sensors...

Claims

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Application Information

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IPC IPC(8): C30B29/32C30B7/10
Inventor 徐刚何万波江伟李卓斌任召辉魏晓韩高荣沈鸽
Owner ZHEJIANG UNIV
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