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A kind of preparation method and product of micron bi4ti3o12 cuboid

A cuboid, micron-scale technology, applied in chemical instruments and methods, inorganic chemistry, bismuth compounds, etc., can solve problems such as serious agglomeration and difficulty in controlling the shape of bismuth titanate, and achieve simple preparation process, easy large-scale production, and easy control Effect

Inactive Publication Date: 2016-04-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Usually, Bi 4 Ti 3 o 12 The preparation of bismuth titanate mostly adopts solid phase method, but the prepared product not only agglomerates seriously, but also it is difficult to control the shape of the synthesized bismuth titanate

Method used

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  • A kind of preparation method and product of micron bi4ti3o12 cuboid
  • A kind of preparation method and product of micron bi4ti3o12 cuboid
  • A kind of preparation method and product of micron bi4ti3o12 cuboid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Weigh 5.1 mmol of tetrabutyl titanate, add it dropwise into deionized water, and control the concentration of tetrabutyl titanate to 0.4 mol / L.

[0036] 2) Weigh 6.8 mmol of bismuth nitrate pentahydrate, add it into the suspension prepared in step 1), and stir thoroughly.

[0037] 3) Weigh 0.04 mol of potassium hydroxide, add to the suspension solution prepared in step 2), and stir for at least 30 minutes.

[0038] 4) Weigh 0.125 mmol polyvinyl alcohol (PVA), dissolve it in deionized water, and control the concentration of PVA to be 0.0125 mol / L.

[0039] 5) In the stirring state, add the PVA solution prepared in step 4) dropwise to the suspension prepared in step 3), and disperse through sufficient stirring and ultrasonic vibration, and then use deionized water to adjust its volume. 4 / 5 of the volume of the inner tank of the reaction kettle, and the precursor solution is obtained at this time.

[0040] 6) Add the precursor solution prepared in step 5) into the inn...

Embodiment 2

[0043] 1) Weigh 5.1 mmol of tetrabutyl titanate, add it dropwise into deionized water, and control the concentration of tetrabutyl titanate to 0.6 mol / L.

[0044] 2) Weigh 6.8 mmol of bismuth nitrate pentahydrate, add it into the suspension prepared in step 1), and stir thoroughly.

[0045] 3) Weigh 0.04 mol of potassium hydroxide, add to the suspension solution prepared in step 2), and stir for at least 30 minutes.

[0046] 4) Weigh 0.12 mmol polyvinyl alcohol (PVA), dissolve it in deionized water, and control the concentration of PVA to be 0.012 mol / L.

[0047] 5) In the stirring state, add the PVA solution prepared in step 4) dropwise to the suspension prepared in step 3), and disperse through sufficient stirring and ultrasonic vibration, and then use deionized water to adjust its volume. 4 / 5 of the volume of the inner tank of the reaction kettle, and the precursor solution is obtained at this time.

[0048] 6) Add the precursor solution prepared in step 5) into the inner t...

Embodiment 3

[0051] 1) Weigh 5.1 mmol of tetrabutyl titanate, add it dropwise into deionized water, and control the concentration of tetrabutyl titanate to 0.6 mol / L.

[0052] 2) Weigh 6.8 mmol of bismuth nitrate pentahydrate, add it into the suspension prepared in step 1), and stir thoroughly.

[0053] 3) Weigh 0.04 mol of potassium hydroxide, add to the suspension solution prepared in step 2), and stir for at least 30 minutes.

[0054] 4) Weigh 0.13 mmol polyvinyl alcohol (PVA), dissolve it in deionized water, and control the concentration of PVA to be 0.013 mol / L.

[0055] 5) In the stirring state, add the PVA solution prepared in step 4) dropwise to the suspension prepared in step 3), and disperse through sufficient stirring and ultrasonic vibration, and then use deionized water to adjust its volume. 4 / 5 of the volume of the inner tank of the reaction kettle, and the precursor solution is obtained at this time.

[0056] 6) Add the precursor solution prepared in step 5) into the inner...

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Abstract

The invention discloses a preparation method of a micron-scale Bi4Ti3O12 cuboid. The preparation method of the micron-scale Bi4Ti3O12 cuboid comprises the following steps: mixing tetrabutyl titanate, bismuth nitrate pentahydrate and water to obtain suspension liquid, wherein the mole ratio of tetrabutyl titanate to bismuth nitrate pentahydrate is (3.75-4.25):(2.75-3.25); mixing KOH with the suspension liquid, and then dropwise adding a PVA (polyvinyl alcohol) solution into the suspension liquid, so that a precursor solution is obtained; carrying out hydrothermal reaction at 240-260 DEG C for 32-34 hours, so that the micron-scale Bi4Ti3O12 cubic is obtained, wherein the concentration of KOH in the precursor solution is 0.8-1.2mol / L, the concentration of Bi<3+> is 0.1-0.2mol / L, and the concentration of PVA is 0.003-0.004mol / L. Bi4Ti3O12 in the morphology is obtained by accurately regulating and controlling use amounts of raw materials and hydrothermal reaction conditions, and a preparation technology is simple and easy to control, so that industrialized mass production of micron-scale Bi4Ti3O12 cuboids can be realized.

Description

technical field [0001] The present invention relates to the preparation method of bismuth titanate material, relate in particular to a kind of micron Bi 4 Ti 3 o 12 Preparation method and product of cuboid. Background technique [0002] It is well known that the structure and morphology of materials have an important impact on their physical and chemical properties, which has also triggered a lot of research on micro-nano materials with various morphological structures. Ferroelectric materials with properties such as ferroelectricity, piezoelectricity, pyroelectricity, electro-optic and nonlinear optics are also an important class of functional materials, and the research on their preparation and properties has become a research hotspot today. [0003] Bi 4 Ti 3 o 12 It has a high Curie temperature and polarization strength, and the Curie temperature of its ferroelectric phase transition is 750 ° C. It also has many advantages such as a low dielectric constant and sign...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G29/00
Inventor 徐刚白惠文邓世琪沈鸽韩高荣
Owner ZHEJIANG UNIV