Raman spectroscopic technique was applied to study complex borosilicate glasses to elucidate Al2O3, B2O3, Na2O, and SiO2 effects on the network structure evolution with an emphasis on the nepheline formation tendency in the glasses. An origin of the observed Raman band near 850 cm-1 in the quenched glass samples was elucidated by studying the quenched and slowly cooled samples using a variety of spectroscopic methods. The results suggested that the characteristic Raman band near 850 cm-1 was closely related to the nepheline-like nanocrystals formed in the quenched glass samples. Composition models for both the characteristic Raman band intensity and liquidus were developed. The two models provide a consistent outcome that increase in B2O3 and SiO2 decreases the Raman band intensity, or nepheline formation tendency, and liquidus, whereas increase Al2O3 and Na2O increases the Raman band intensity, or nepheline formation tendency, and liquidus temperture.
Revised: January 8, 2009 |
Published: December 1, 2003
Citation
Li H., P.R. Hrma, J.D. Vienna, M. Qian, Y. Su, and D.E. Smith. 2003.Effects of Al2O3, B2O3, Na2O, andSiO(2) on nepheline formation in borosilicate glasses: chemical and physical correlations.Journal of Non-crystalline Solids 331, no. 1-3:202-216.PNNL-SA-37087.doi:10.1016/j.jnoncrysol.2003.08.082