For XRD,TG and conductivity tests,alumina–colloidal silica suspensions containing HA,CAC or HA+CAC asadditives were prepared.XRD measurements were carried out in Bruker equipment. TG evaluations of the cured materials were conducted in a Netzsch STA449 device,using a heating rate of10 1C/min withasyntheticair(80%N2–20% O2) flow of 50cm3/min and α-Al2O3 as acorrection standard.The
specific ionic conductivity as a function of time was attained with the help of ESAMA TEC 9800 equipment.