15 / 2017-08-26 00:06:04

Crystallization kinetics and thermal stability of ZrO2 monolithic aerogel improved by SiO2 layer

ZrO2; aerogel; SiO2 ; thermal stability; crystallization kinetics

《Integrated Ferroelectrics》（SCI检索） 英文全文 > 《Integrated Ferroelectrics》（SCI检索）

ZrO2 aerogel modified by SiO2 (ZSA) was synthesized by aging ZrO2 gel in tetraethoxysilane (TEOS) solution using ZrOCl2·8H2O as precursor, and 1,2-propylene oxide (PO) as gelation agent followed by ethanol supercritical fluid drying. Textural properties and thermal stability of ZSA after calcined at elevated temperature were studied comparing with pure ZrO2 aerogel. The prepared samples were characterized using XRD, TG-DSC, N2 adsorption/desorption, SEM and TEM. The results show that high temperature stability of YSA are highly improved due to the SiO2 layer hindering the proliferation, nucleation and growth process of ZrO2.