Effect of Phase Separation on HF Etch Rate of Borosilicate Glasses
- 1 July 1977
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 60 (7-8) , 301-304
- https://doi.org/10.1111/j.1151-2916.1977.tb15546.x
Abstract
Etch rates of borosilicate glasses in HF were studied as a function of heat‐treatment time and temperature for liquid‐in‐liquid phase separation. It is shown that, when the phase‐separated glass has an interconnected microstructure, the composition of the chemically less durable phase is the dominant factor in HF durability. When the phase‐separated glass has a dispersed alkali‐borate‐rich (chemically less durable) phase embedded in a silica‐rich matrix, the HF etch rate is constant, independent of the extent of phase separation.Keywords
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