2012 Volume 53 Issue 9 Pages 1706-1709
The objective of this work is to develop a manufacturing method for porous SiO2. Porous SiO2 was fabricated by decarburization after sintered at 1472 K with carbon particles. Porosity of C20SiO2 (added carbon particles of 20 vol%), C40SiO2 (added carbon particles of 40 vol%), C60SiO2 (added carbon particles of 60 vol%) and C80SiO2 (added carbon particles of 80 vol%) were 20.4 ± 0.4, 40.5 ± 0.4, 60.6 ± 0.3, and 80.7 ± 0.3 vol%, respectively. It is to say that the porosity of the porous SiO2 could be controlled by less than ±1% of the amount of carbon particles. In addition, pore size of porous SiO2 could be controlled by the size of the carbon particles. Furthermore, pore-size of the porous SiO2 depends on the size of carbon particles instead of the quantity of the carbon particles. Decarburization processing method is a simple and economical manufacturing method to controlled porosity and pore size of porous SiO2.