Abstract
ZrO2–SiO2 aerogel modified by Fe(III) ion was prepared and the stability of the samples under high temperature was investigated. The structure and properties of modified aerogels were characterized by N2 adsorption–desorption, FT-IR, XRD and TEM. The samples still contain a specific surface area about 228 m2/g after 1,000 °C 0.5 h calcinations. The inhibition of ZrO2 particle growth is attributed to the Fe(III) ion modified aerogel surface, which strongly retards the ZrO2 tetragonal phase transformation as well.
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