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<p>to be slowly dried off without causing the solid matrix in the gel to collapse from <a href="page.php?w=capillary_action">capillary action</a>, as would happen with conventional <a href="page.php?w=evaporation">evaporation</a>. The first aerogels were produced from <a href="page.php?w=silica_gel">silica gel</a>s. Kistler's later work involved aerogels based on <a href="page.php?w=alumina">alumina</a>, <a href="page.php?w=Chromium%28III%29_oxide">chromia</a>, and <a href="page.php?w=tin_dioxide">tin dioxide</a>. <a href="page.php?w=Carbon">Carbon</a></p><p>
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