Effect of Both Acid and Base Etching on Phosphate Laser Glass Surfaces

doi:10.3724/SP.J.1077.2012.00627

Abstract

Abstract: The effect of chemical etching processes on phosphate laser glass surfaces was investigated. Under different process conditions (e.g. sonication and agitation), conventionally polished and subsequently washed phosphate glass plates were treated by submerging in both HCl and KOH solution either with or without BaCl₂. Subsequently, Raman spectra and X-ray photoelectron spectroscope (XPS) of the treated surfaces were measured. The precipitation of metal cations and depolymerization of the glass network structure are the two main chemical reactions in both solutions: One refers to the substitution of P-O-H for P-O-M, the other is that the Q² tetrahedra, the basic structural unit of the original metaphosphate glass, has gradually been replaced by the Q¹ or Q⁰ tetrahedra. Finally, the reaction models of phosphate laser glasses dissolved in both HCl and KOH solution are proposed.

Key words: phosphate glass, etching, Raman spectra, XPS

CLC Number:

TQ171

ZHANG Lei, HUANG Li, DING Jia, CHEN Hui-Yu, CHEN Wei, HU Li-Li. Effect of Both Acid and Base Etching on Phosphate Laser Glass Surfaces[J]. Journal of Inorganic Materials, 2012, 27(6): 627-632.

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