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Method for preparing lanthanum titanium aluminate ceramic material by coprecipitation method

A technology of ceramic materials and co-precipitation method, which is applied in the field of titanium lanthanum aluminate ceramic materials, can solve the problems that the oxide powder raw materials of the three-dimensional mixer cannot be fully mixed, the reaction cannot be fully completed, and the purity of the bulk material is not high. , to achieve easy sintering reaction, shortened sintering temperature and holding time, and good fluidity

Inactive Publication Date: 2010-02-03
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the oxide powder raw materials cannot be fully mixed by using a three-dimensional mixer, there is segregation of raw material components in local areas, and the obtained sintered block material contains impurities; During the slurry drying process, due to the different densities of the oxide raw materials, stratification occurs, which also leads to the incomplete reaction in the later sintering process, and the purity of the obtained block material is not high.

Method used

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  • Method for preparing lanthanum titanium aluminate ceramic material by coprecipitation method
  • Method for preparing lanthanum titanium aluminate ceramic material by coprecipitation method
  • Method for preparing lanthanum titanium aluminate ceramic material by coprecipitation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Step 1: Prepare the first reaction solution

[0051] 3.62g of lanthanum nitrate La(NO 3 ) 3 2H 2 O, 33.76g of aluminum nitrate Al(NO 3 ) 3 9H 2 0 and 200ml alcohol are put into reaction vessel 1 (as figure 1 shown), under the temperature condition of 25°C, the first reaction solution was obtained after stirring with a magnetic stirrer 2 for 15 minutes;

[0052] The second step: prepare the second reaction solution

[0053] Add 6.83ml of tetrabutyl titanate Ti(OC 4 h 9 ) 4 , under the temperature condition of 25° C., the second reaction solution was prepared after stirring with a magnetic stirrer 2 for 30 minutes;

[0054] The third step: prepare the third reaction solution

[0055] The ammoniacal liquor that adds 25ml in the second reaction liquid makes the third reaction liquid;

[0056] The third reaction liquid is a hydroxide containing aluminum, titanium, lanthanum, and a mixture of alcohol and ammonia;

[0057] The fourth step: vacuum filtration to obt...

Embodiment 2

[0065] Step 1: Prepare the first reaction solution

[0066] 5.3g of lanthanum nitrate La(NO 3 ) 3 2H 2 O, 49.40g of aluminum nitrate Al(NO 3 ) 3 9H 2 The alcohol of 0 and 150ml is put into reaction vessel 1 (as figure 1 shown), under the temperature condition of 22°C, the first reaction solution was obtained after stirring with a magnetic stirrer 2 for 30 minutes;

[0067] The second step: prepare the second reaction solution

[0068] In the first reaction solution, add 10ml of tetrabutyl titanate Ti(OC 4 h 9 ) 4 , under the temperature condition of 25° C., the second reaction solution was prepared after stirring with a magnetic stirrer 2 for 30 minutes;

[0069] The third step: prepare the third reaction solution

[0070] The ammoniacal liquor that adds 45ml in the second reaction liquid makes the third reaction liquid;

[0071] The third reaction liquid is a hydroxide containing aluminum, titanium, lanthanum, and a mixture of alcohol and ammonia;

[0072] The fo...

Embodiment 3

[0080] Step 1: Prepare the first reaction solution

[0081] 1.5g of lanthanum nitrate La(NO 3 ) 3 2H 2 O, 14g of aluminum nitrate Al(NO 3 ) 3 9H 2 0 and 100ml alcohol are put into reaction vessel 1 (as figure 1 As shown), under the temperature condition of 30°C, the first reaction solution was obtained after stirring with a magnetic stirrer 2 for 10 minutes;

[0082] The second step: prepare the second reaction solution

[0083] Add 2.83ml of tetrabutyl titanate Ti(OC 4 h 9 ) 4 , under the temperature condition of 30° C., the second reaction solution was obtained after stirring with a magnetic stirrer 2 for 30 minutes;

[0084] The third step: prepare the third reaction solution

[0085] The ammoniacal liquor that adds 10ml in the second reaction liquid makes the 3rd reaction liquid;

[0086] The third reaction liquid is a hydroxide containing aluminum, titanium, lanthanum, and a mixture of alcohol and ammonia;

[0087] The fourth step: vacuum filtration to obtain...

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Abstract

The invention discloses a method for preparing lanthanum-aluminum acid titanium ceramic material by adopting the co-precipitation method. The lanthanum-aluminum acid titanium material used as thermalceramic coating is prepared by selecting the aluminium nitrate, lanthanum nitrate, and tetra-n-butyl titanate as raw materials. With the co-precipitation method, the method for preparing lanthanum-aluminum acid titanium ceramic material can prepare a precipitation product evenly mixed at the molecular level, thereby leading to easier and more complete implementation of the subsequent agglomerationreaction, and obtaining LaTi2 Al9 O19 ceramic powder with high purity, even granularity, and good fluidity.

Description

technical field [0001] The present invention relates to a ceramic layer material for making thermal barrier coatings, more particularly, refers to a titanium lanthanum aluminate ceramic material prepared by co-precipitation method, and the service temperature of the titanium lanthanum aluminate ceramic material can reach 1500°C. Background technique [0002] With the development of aviation gas turbine engines towards high thrust-to-weight ratios, the temperature at the front inlet of the turbines has further increased, so higher requirements are placed on the high temperature resistance of high temperature components of the engine. The design outlet temperature of the first-class aero-engine with a thrust-to-weight ratio of 10 has reached above 1550°C, and the design outlet temperature of an aero-engine with a thrust-to-weight ratio of 12 or more will exceed 1750°C. According to the cooling capacity of the engine, the temperature reaching the surface of the alloy substrate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/44C04B35/622
Inventor 徐惠彬谢小云郭洪波宫声凯
Owner BEIHANG UNIV