<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">sol-gel process</topic></authority><related type="broader"><topic>physicochemical processes</topic></related><variant type="other"><topic>sol-gel processing</topic></variant><variant type="other"><topic>solution-gel process</topic></variant> <note xml:lang="en"><![CDATA[ The preparation of inorganic polymers or ceramics from solution through a transformation from liquid precursors to a sol and finally to a network structure called a ‘gel.’ Traditionally, the formation of a sol occurs through hydrolysis and condensation of metal alkoxide precursors, but a sol can be more generally defined as a colloidal suspension, which encompasses a wider range of systems.  ]]></note></mads>