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Method for preparing uniform dispersion square phase barium titanate nanocrystal

A technology of hydrothermal synthesis and phase barium titanate, which is applied in nanotechnology, nanotechnology, nanostructure manufacturing, etc.

Inactive Publication Date: 2007-10-03
胜利油田华鑫石油材料有限公司
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  • Abstract
  • Description
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Therefore, to a certain extent, the BaTiO 3 Application in industry

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  • Method for preparing uniform dispersion square phase barium titanate nanocrystal
  • Method for preparing uniform dispersion square phase barium titanate nanocrystal

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Embodiment Construction

[0007] A method for preparing homogeneously dispersed tetragonal phase barium titanate nanocrystals by hydrothermal synthesis, the specific steps are as follows:

[0008] 1. Under heating and stirring, add the titanium source into the reaction kettle, add deionized water to dissolve, and adjust the pH value to 10-14 with alkali.

[0009] 2. Heating to dissolve Ba(OH) 2 ·8H 2 O, according to the molar ratio Ba / Ti = 1-2, add to the above reaction kettle, heat and stir for 1-3 hours, the temperature is 80-100 ° C, to ensure that the precursor is completely dissolved to form a homogeneous solution.

[0010] The order of the above steps 1 and 2 is not limited.

[0011] 3. The filling degree of the autoclave is 70-80%, and the autoclave is sealed and put into an oven at 100-200°C for reaction for 24-74 hours.

[0012] 4. Take out the reaction kettle, filter, wash the solid matter with ammonium chloride solution and deionized water several times until the filtrate is neutral, and ...

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Abstract

A process for preparing the uniformly dispersed square barium sodium titanate nanocrystals by hydrothermal synthesis method includes using inorganic alkali or the combination of organ alkali and inorganic alkali to regulate the pH value of reaction system, respectively preparing the homogeneous solutions of the reactant precursors (TiO2 or tetrabutyl titanate and barium hydroxide) at 80-100 deg.C, and two-stage hydrothermal reaction in high-pressure reactor at 100-200 deg.C while crystallizing.

Description

technical field [0001] The invention relates to the preparation of titanate, in particular to a hydrothermal synthesis preparation method of homogeneously dispersed tetragonal phase barium titanate nanometer material. Background technique [0002] Barium titanate (BaTiO 3 ) is a ferroelectric and ferroelectric material with excellent performance. It is the earliest discovered ferroelectric ceramic with specific performance. It is still widely used to make thermistors (PTCR) and multilayer ceramic capacitors (MLC). ), electro-optical devices, etc. It is one of the most widely used materials in the field of electronic ceramics. In recent years, the development of microelectronic communication has led to the miniaturization of multilayer ceramic capacitors to adapt to them. To achieve the goals of high precision, miniaturization and high reliability of electronic ceramic components, it is necessary to prepare high-quality powders with uniform sizes. High purity, uniform disp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00C04B35/468B82B3/00
Inventor 安长华柳云骐刘春英仝玉华王强魏凯
Owner 胜利油田华鑫石油材料有限公司
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