Mem_Fac_Eng_OU_23_1_39.pdf 303 KB
Yuasa Motokazu Sekisui Chemical Industry, Ltd.
三浦 嘉也 Department of Applied Chemistry
高橋 克明 Department of Applied Chemistry
Sodium borosilicate gels of compositions similar to that of Vycor(R) glass like 80SiO(2).15B(2)O(3).5Na(2)O (wt%) were prepared from hydrolysis and polycondensation of metal alkoxides under the HCl catalysis. Variation of specific surface area and porosity with temperature indicated that closed pores were opened below 400℃, and collapsed above 450℃ after the porosity reached a maximum value around 450℃. The structural evolution was examined due to IR spectra and a phase separation in the gels was observed. The solubility of the gels into 1N-HCl was studied as a function of the treatment temperature.
Memoirs of the Faculty of Engineering, Okayama University
Faculty of Engineering, Okayama University
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