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In this work we studied the influence of microwaves in the pore structure of silica gels obtained via sol-gel polymerization process. We analised the feasibility of replacing conventional heating by microwave heating during drying. Structural parameters such as specific volume of pores (V p ), specific surface area (S p ), average pore size (r p ) and the bulk and true densities were measured. X-ray diffraction confirmed the obtention of a completely amorphous structure for the gels. Somedoi:10.1590/s1516-14392002000400009 fatcat:eistnsahqjgefprcoyxxktuvk4