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Method for preparing BaTiO3-SrTiO3 miscible ceramic powder

A ceramic powder, mixed-phase technology, applied in ceramics, inorganic insulators, etc., can solve the problems of contact state distribution, complex reaction, etc., and achieve the effect of superior electrical performance

Inactive Publication Date: 2009-09-16
SHANGHAI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0002] Solid-state reaction is the basic method of ceramic material science. The reaction between powders is quite complicated. Although the reaction is carried out from the contact part between solids through ion diffusion, the contact state and the distribution of various raw material particles are significantly affected by the properties of each particle. and powder handling methods

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  • Method for preparing BaTiO3-SrTiO3 miscible ceramic powder
  • Method for preparing BaTiO3-SrTiO3 miscible ceramic powder
  • Method for preparing BaTiO3-SrTiO3 miscible ceramic powder

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Embodiment 1

[0023] Embodiment 1: the preparation process and steps in this embodiment are as follows:

[0024] 1. Solid state reaction synthesis of BaTiO 3 -SrTiO 3 Matrix powder

[0025] (1) Using analytically pure principle BaCO 3 , SrCO 3 , TiO 2 , weigh the above three raw materials according to the required stoichiometric ratio; first weigh a certain amount of BaCO 3 with a certain amount of TiO 2 Put the ingredients into a ball mill tank, add an appropriate amount of deionized water and anhydrous ethanol, and continue ball milling for 24 hours; in addition, a certain amount of SrCO 3 with a certain amount of TiO 2 Put the ingredients into a ball milling tank, add an appropriate amount of deionized water and anhydrous ethanol, and perform continuous ball milling for 24 hours; the weight of the ball milling medium put in during ball milling is 1.2 times the weight of the raw materials used;

[0026] (2) Put the above-mentioned two kinds of ball-milled slurries into a clean por...

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Abstract

The invention relates to a method for preparing BaTiO3-SrTiO3 miscible ceramic powder, belonging to the technology filed of the preparation technology of the ceramic powder for special type ceramics. The invention essentially comprises the following steps: ultrasonic processing method and solid reaction process are respectively adopted to prepare sols and synthetical solid phase matrix powder materials; precursor sol solution which is prepared by the sol-gel method is used for packaging solid phase reaction matrix powder materials; ultrasonic treatment is used for realizing the complete and even mixing of the nanometer precursor sol solution and the solid phase reaction matrix powder materials; and heat treatment is used for realizing the package of the matrix powder materials by nanometer grains so as to obtain special electronic ceramics with good sintering capability. The ceramic components prepared by the miscible ceramic powder which is obtained by the method have predominant dielectric property.

Description

technical field [0001] The present invention relates to a kind of BaTiO 3 -SrTiO 3 The invention discloses a preparation method of mixed-phase ceramic powder, belonging to the technical field of preparation technology of ceramic powder for special ceramics. Background technique [0002] Solid-phase reaction is the basic method of ceramic material science. The reaction between powders is quite complicated. Although the reaction proceeds from the contact part between solids through ion diffusion, the contact state and the distribution of various raw material particles are significantly affected by the properties of each particle. and powder handling methods. The solid-phase raw materials of the components required for the preparation of ceramic materials should be fully mixed to make their components evenly distributed, so that the chemical reaction between the components with the mixture at a certain temperature can be fully and completely carried out, so as to obtain the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/47H01B3/12
Inventor 金灯仁徐洪海
Owner SHANGHAI UNIV
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