Monolithic ZrO2 aerogels with good strength performance and homogeneous network structure were
prepared through sol鄄gel technology with ZrOCl2·8H2O as precursor. Acetic acid (HAC) was added to the system to
control the process of sol鄄gel, polyethylene glycol 600 (PEG) and formamide (FA) were supplied to make the gel
network more homogeneous, propylene epoxide (PO) was added to promote hydrolysis and polycondensation progress,
and then monolithic ZrO2 aerogels were obtained after being dried by high temperature supercritical fluid drying meth鄄
od (HTSCFD). Mechanism of ZrO2aerogels preparation was discussed in this paper, and the effects of FA and PEG
on the structure and morphology of the samples were also investigated. The microstructure and properties of the sam鄄
ples were characterized by SEM, BET and other analytic methods. The results showed that the pore volume and aver鄄
age pore size decreased, the specific surface area increased with the increasing of FA; pore volume , specific surface
area and average pore size increased first,and then decreased after with the increasing of PEG.