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Core-shell structure ZrO2-Al2O3 aerogels prepared by one-step drying under constant pressure

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Title Core-shell structure ZrO2-Al2O3 aerogels prepared by one-step drying under constant pressure
 
Creator Wang, Xiaoqing
Wu, Yangyang
Chen, Gangling
Zhang, Shouquan
Quan, Xinyao
 
Subject Ambient pressure drying
core-shell
hollow sphere
sol-gel
ZrO2-Al2O3
 
Description 647-653
drying. In the preparation process of Al2O3 hollow spheres, different mole of ZrOCl2ꞏ8H2O was added. We explored the
maximum addition of zirconium via ambient pressure drying. A series of ZrO2-Al2O3 aerogels with hollow sphere structure
are successfully synthesized using AlCl3ꞏ6H2O and ZrOCl2ꞏ8H2O as aluminum and zirconium precursor, and propylene
oxide (PO) as the gel initiator by the sol-gel method. It was found that the gelation time was prolonged with increasing
zirconium content. When the zirconium content was more than 10%, the gel can't be obtained. It can only get precipitation.
With the zirconium content increase from 0 to 10%, the core-shell structure can be formed, proved by SEM and TEM
characterizations. The core-shell structure can be kept well under 1000°C. When the heat treatment temperature was at
1200°C, the diffraction peaks were mainly ZrO2 and Al2O3, showed by XRD. With the content of zirconium increase from 0
to 10%, the specific surface area of XZrO2-Al2O3-aerogel increased from 170 to 582 m2/g.
 
Date 2024-07-03T06:22:27Z
2024-07-03T06:22:27Z
2024-07
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscpr.res.in/handle/123456789/64152
https://doi.org/10.56042/ijct.v31i4. 9182
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJCT Vol.31(4) [July 2024]