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Depolymerization of GeO 2 and B 2 O 3 ‐GeO 2 Network Glasses by Sb 2 O 3
Author(s) -
RIEBLING E. F.
Publication year - 1973
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1973.tb12501.x
Subject(s) - depolymerization , ternary operation , crystallography , spectral line , infrared spectroscopy , analytical chemistry (journal) , materials science , mineralogy , chemistry , physics , organic chemistry , astronomy , computer science , polymer chemistry , programming language , chromatography
Binary Sb 2 O 3 ‐GeO 2 glasses containing 45 mol% Sb 2 O 3 and ternary Sb 2 O 3 ‐B 2 O 3 ‐GeO 2 glasses containing 50 mol% GeO 2 were prepared. Their densities (volumes), refractive indices, and infrared spectra were determined, and their colors and high‐temperature viscosities were estimated visually. Small amounts of Sb 2 O 3 (∼10 mol%) appear to perturb neither the Ge‐O‐Ge network nor those B‐O‐Ge networks with small B/Ge ratios (∼0.2). The B‐O‐Ge networks with larger B/Ge ratios (∼1.0) depolymerize in the presence of even less Sb 2 O 3 . Amounts of Sb 2 O 3 >10 mol% appear to depolymerize the Ge‐O‐Ge and Ge‐O‐B networks progressively, possibly with the formation of chains. A structurally sensitive ir isofrequency contour technique developed for ternary glass systems was applied successfully to these Sb 2 O 3 ‐B 2 O 3 ‐GeO 2 glasses. These contours can thus readily detect significant network depolymerization in the absence of the usual network modifiers.