SiO₂powders were manufactured from TEOS, CES(condensed ethyl silicates) and PHT(partially hydrated TEOS) by sol-gel method. Then the chemical and the physical properties of the SiO₂powders are measured by IR, GC, TGA-DTA, XRD, SEM and particle siz...
SiO₂powders were manufactured from TEOS, CES(condensed ethyl silicates) and PHT(partially hydrated TEOS) by sol-gel method. Then the chemical and the physical properties of the SiO₂powders are measured by IR, GC, TGA-DTA, XRD, SEM and particle size analyser.
The chemical properties in IR spectra and GC analysis of CES are similar to those of PHT. Also the physical properties of SiO₂powders made from PHT are very analogous with the one manufactured from CES.
The results suggest that the PHT in manufacturing of mullite and cordierite ceramics can be replaced with the CES.