Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing stabilized aluminium titanate superfine powder by sol-gel technology under low temperature and product prepared therefrom

An ultra-fine powder, aluminum titanate technology, applied in chemical instruments and methods, inorganic chemistry, titanium compounds, etc., can solve the problems of low strength, easy decomposition, loss of aluminum titanate properties, etc., to achieve high synthesis rate, Good dispersion effect

Active Publication Date: 2014-01-22
JINGDEZHEN CERAMIC UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this material has two fatal shortcomings: one is that it is easy to decompose into rutile and corundum phases in the range of 800-1280 ° C, and lose the excellent performance of aluminum titanate; the other is that it is difficult to sinter and its strength is very low
At present, there is no literature report on the preparation of stabilized aluminum titanate ultrafine powder by hydrolysis sol-gel process at low temperature at home and abroad

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing stabilized aluminium titanate superfine powder by sol-gel technology under low temperature and product prepared therefrom
  • Method for preparing stabilized aluminium titanate superfine powder by sol-gel technology under low temperature and product prepared therefrom
  • Method for preparing stabilized aluminium titanate superfine powder by sol-gel technology under low temperature and product prepared therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In a fume hood, put 30ml of absolute ethanol into a dry jar, place it in a cold water bath, pipette 4ml of titanium tetrachloride and slowly mix it with ethanol, stir evenly with a magnetic force, and prepare tetrachloride Titanium oxide ethanol solution; according to the stoichiometric ratio of aluminum titanate Al:Ti=2:1, measure 27.36g of aluminum nitrate, dissolve it in 90ml of ethanol, stir vigorously at room temperature for a certain period of time, and prepare a certain concentration of aluminum nitrate in ethanol solution; two prepared precursor ethanol solutions are mixed and stirred evenly to obtain a yellow transparent mixed solution; 0.856g of magnesium acetate is added to the prepared transparent mixed solution, and the obtained mixed solution is placed under pressure with a polytetrafluoroethylene lining In the container bomb, the filling rate is 40%. After sealing, place it in an oven at 150°C to react under its own pressure for 18 hours; put the wet gel o...

Embodiment 2

[0030] In a fume hood, take 16ml of absolute ethanol and put it into a dry jar, place it in a cold water bath, pipette 2.8ml of titanium tetrachloride and slowly mix it with ethanol, stir evenly with a magnetic force, and prepare four Titanium chloride ethanol solution; according to the stoichiometric ratio of aluminum titanate Al:Ti=2:1, measure 18.907g of aluminum nitrate, dissolve it in 56ml of ethanol, stir vigorously at room temperature for a certain period of time, and prepare a certain concentration of aluminum nitrate in ethanol solution; the two prepared precursor ethanol solutions are mixed and stirred evenly to obtain a yellow transparent mixed solution; 0.439g magnesium ethylate is added to the prepared transparent mixed solution, and the obtained mixed solution is placed under pressure with a polytetrafluoroethylene liner In the container bomb, the filling rate is 50%. After sealing, place it in an oven at 180°C to react under its own pressure for 15 hours; put the...

Embodiment 3

[0032]In a fume hood, take 40ml of absolute ethanol and put it into a dry jar, place it in a cold water bath, pipette 4ml of titanium tetrachloride and slowly mix it with ethanol, stir it evenly with a magnetic force, and prepare tetrachloride Titanium oxide ethanol solution; according to the stoichiometric ratio of aluminum titanate Al:Ti=2:1, measure 27.36g of aluminum nitrate, dissolve it in 96mL of ethanol, stir vigorously at room temperature for a certain period of time, and prepare a certain concentration of aluminum nitrate in ethanol solution; the two prepared precursor ethanol solutions are mixed and stirred evenly to obtain a yellow transparent mixed solution; 1.68g ferric sulfate (Fe 2 (SO 4 ) 3 9H 2 (2), the mixed solution obtained is placed in a pressure bomb with a polytetrafluoroethylene liner, and the filling rate is 60%, and after sealing, it is placed in a baking oven at 120° C. to make it react for 20 hours under its own pressure; The wet gel obtained by ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a stabilized aluminium titanate superfine powder by a sol-gel technology under a low temperature and a product prepared therefrom. Reaction precursor raw materials of Al(NO3)3.9H2O and TiCl4, a solvent of absolute ethyl alcohol and stabilizing agents of ferric salt and magnesium salt or combination of the two are prepared into a stabilized aluminium titanate superfine powder with a particle size of 100-200 nm, good dispersibility and high synthesis rate under 1000-1150 DEG C by employing a hydrolytic sol-gel (HSG) method and by means of a pressure vessel gelating technology. Unification of stabilization and ultra-fining of aluminium titanate is realized for the first time.

Description

technical field [0001] The invention relates to the technical field of ceramic powder preparation, in particular to a method for preparing stabilized aluminum titanate ultrafine powder at low temperature through a sol-gel process and a product thereof. Background technique [0002] As a ceramic material with the best high temperature resistance among low expansion materials, aluminum titanate has high melting point, low thermal conductivity, small expansion coefficient, good thermal shock resistance, strong corrosion resistance and good resistance to various metals and glasses. The melt does not infiltrate and other characteristics, and the application prospect is broad. However, this material has two fatal shortcomings: one is that it is easy to decompose into rutile and corundum phases in the range of 800-1280 ° C, and lose the excellent performance of aluminum titanate; the other is that it is difficult to sinter and its strength is very low. Studies have shown that the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/00C04B35/462C04B35/626
Inventor 江伟辉张权刘健敏朱庆霞谭训彦包镇红苗立锋虞澎澎
Owner JINGDEZHEN CERAMIC UNIV