Search Home >>

Sodium borosilicate glasses prepared by the sol-gel process

DOI: 10.1016/0022-3093(88)90055-5
Title: Sodium borosilicate glasses prepared by the sol-gel process
Journal Title: Journal of Non-Crystalline Solids
Volume: 100
Publication Date: March 1988
Start Page: 409
End Page: 412
Published online: 7 May 2003
ISSN: 0022-3093
Author: Akiyoshi Osaka
Affiliations: Department of Industrial Chemistry, School of Engineering, Okayama University, 3-1-1, Tsushima Naka, Okayama-shi 700 Japan
Abstract: borosilicate gel of composition 80SiO2·15B2O3·5Na2O (wt%) was prepared from tetraethyl orthosilicate, trimethyl borate, sodium methylate, H2O, and HCl as the catalyst. Variation of specific surface area and porosity as a function of heating temperature indicated that closed pores were opened at temperatures lower than 400°C and collapsed above 450°C. From TG and DTA curves, about 19% Si and B atoms are evaluated to have ?OH bonds. X-ray diffraction patterns indicated crystallization of low-cristobalite out of the gel when it was heated at 700°C for 5 h, showing a difference from a melt-quenched glass of the same composition.
Corresponding information:

Related Paper

Top 10 Paper

New 10 Paper

PC Version