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Method for fast preparing micron-level lamellar barium titanate powder

A flaky barium titanate, micron-scale technology, which is applied in the field of preparation of micron-scale flaky BaTiO3 powder, can solve the problems of low production efficiency, difficulty in realizing industrialization, difficult process control, etc., and reduce quality control links , Realize the effect of industrialization and easy industrialization

Active Publication Date: 2011-07-06
XIAN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention provides a method for rapidly preparing micron-scale flaky barium titanate powder to overcome the cumbersome process of the prior art, the product is greatly affected by the inconsistent volatilization of molten salt components, the process is difficult to control, and the preparation cycle is too long. long, the production efficiency is not high, and it is difficult to realize the problem of industrialization

Method used

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  • Method for fast preparing micron-level lamellar barium titanate powder
  • Method for fast preparing micron-level lamellar barium titanate powder

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Example 1 : A rapid preparation of micron-scale flake BaTiO 3 The method of powder, comprises the following steps successively:

[0029] The first step (1) will BaCO 3 Powder, TiO2 Powder and KF powder were mixed at a molar ratio of 1:1:49, using a polytetrafluoroethylene ball mill tank, agate balls, and anhydrous ethanol medium during the mixing process, and ball milled for 6 hours, then dried at 60-75°C for use; (2 ) Put the mixture into a platinum crucible, heat it in an ordinary crucible resistance furnace until it melts to obtain a melt, and keep the melt at 950±20°C for 2 hours for use; (3) Cool the melt until it solidifies to obtain a solidified structure;

[0030] The second step first place the coagulated tissue obtained in the first step in boiling deionized water for ultrasonic cleaning, pour off the clear liquid after standing still, and do this several times; then add NH 4 Cl dilute solution, perform ultrasonic cleaning, pour off the clear liquid after ...

Embodiment 2

[0031] Example 2 : A rapid preparation of micron-scale flake BaTiO 3 The method of powder, comprises the following steps successively:

[0032] The first step (1) will BaCO 3 Powder, TiO 2 Powder and KF powder are mixed at a molar ratio of 1:1:62, and the mixing process uses a polytetrafluoroethylene ball mill jar, agate balls, and anhydrous ethanol medium, and the ball mill is mixed for 6 hours, and dried at 60-75°C for use; (2 ) Put the mixture into a platinum crucible, heat it in an ordinary crucible resistance furnace until it melts to obtain a melt, and keep the melt at 1030±20°C for 1.5 hours for use; (3) Cool the melt until it solidifies to obtain a solidified structure;

[0033] The second step first place the coagulated tissue obtained in the first step in boiling deionized water for ultrasonic cleaning, pour off the clear liquid after standing still, and do this several times; then add NH 4 Cl dilute solution, perform ultrasonic cleaning, pour off the clear liqu...

Embodiment 3

[0034] Example 3 : A rapid preparation of micron-scale flake BaTiO 3 The method of powder, comprises the following steps successively:

[0035] The first step (1) will BaCO 3 Powder, TiO 2 Powder and KF powder were mixed at a molar ratio of 1:1:41. During the mixing process, a polytetrafluoroethylene ball mill tank, agate balls, and anhydrous ethanol medium were used for ball milling and mixing for 6 hours, and dried at 60-75°C for use; (2 ) Put the mixture into a platinum crucible, heat it in an ordinary crucible resistance furnace until it melts to obtain a melt, and keep the melt at 880±20°C for 4 hours for use; (3) Cool the melt until it solidifies to obtain a solidified structure;

[0036] The second step first place the coagulated tissue obtained in the first step in boiling deionized water for ultrasonic cleaning, pour off the clear liquid after standing still, and do this several times; then add NH 4 Cl dilute solution, perform ultrasonic cleaning, pour off the cl...

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Abstract

The invention relates to a method for fast preparing micron-level lamellar barium titanate powder. The prior art is complex in technology, long in preparation period, and low in production efficiency. The method sequentially comprises the following steps of: preparing KF-BaTiO3 or BaTiO3 melting body of a hypo eutectic component, and cooling and solidifying the melting body to obtain a solidified tissue; and ultrasonically cleaning the other phases in the solidified tissue to obtain sheet BaTiO3 crystalloid powder. The method specifically comprises the steps: (1) mixing BaCO3 power, TiO2 power with KF power, performing the ball milling by the polytetrafluoroethylene during mixing, performing the polytetrafluoroethylene to the agate, performing the ball milling and mixing for 6 hours with water-free ethanol medium, and drying for later use; (2) heating in a common crucible resistance furnace to be melted to obtain the melting body, and keeping the temperature for 1-4 hours for later use; (3) cooling the melting body to be solidified so as to obtain the solidified tissue; and ultrasonically cleaning to remove the KF and the other impurities in the solidified tissue.

Description

Technical field [0001] The present invention involves micron -grade sheet BATIO 3 The technical field of powder preparation methods involves a method of rapid preparation of micron -type titanic acid pink powder. Background technique [0002] Microcytopcopy BATIO 3 Powder is very suitable for preparing high -performance weaving voltage -electrical ceramic crystals with a broad application prospect. [0003] Titanic acid (BATIO 3 ) The preparation method of powder, including the co-precipitation method, micro emulsion method, citric acid method, oxalate method, water thermal method, solution thermal synthesis method, SOL-GEL method, metal organic thermal solution method and organic salt-hydride oxidationMethods, but these methods cannot prepare a micron -grade sheet BATIO 3 Powder.At present, only at home and abroad, I only see Tsinghua University and Japan's Qingying University of Japan to prepare a micron -class film -shaped BATIO 3 Powder reports and patents.The methods they us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00B82Y40/00
Inventor 惠增哲龙伟李晓娟刘建康
Owner XIAN TECH UNIV
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