HUMIDITY SENSING PROPERTIES WERE INVESTIGATED FOR A THERMALLY STABLE, HIGH SURFACE AREA AND POROUS COMPOSITE MATERIAL COMPOSED OF IRON OXIDE/SILICA (FE:SI AS 1:10 ATOMIC RATIO). THE INVESTIGATED COMPOSITE MATERIAL WAS FORMED BY CALCINATION FOR 3 H AT 600 °C OF THE XEROGEL PRECURSOR, OBTAINED VIA A FORMAMIDE-MODIFIED SOL–GEL PROCESS. THE PRODUCED COMPOSITE MATERIAL WAS CHARACTERIZED BY A HIGH SURFACE AREA, ... إقراء المزيد