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A Preliminary Investigation of the ISG Glass Vapor Hydration
Author(s) -
Abdelouas Abdesselam,
El Mendili Yassine,
Aït Chaou Abdelouahed,
Karakurt Gokhan,
Hartnack Christoph,
Bardeau JeanFrançois,
Saito Takumi,
Matsuzaki Hiroyuki
Publication year - 2013
Publication title -
international journal of applied glass science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 34
eISSN - 2041-1294
pISSN - 2041-1286
DOI - 10.1111/ijag.12055
Subject(s) - borosilicate glass , materials science , water vapor , relative humidity , scanning electron microscope , spectroscopy , diffusion , analcime , fourier transform infrared spectroscopy , aqueous solution , mineralogy , tobermorite , chemical engineering , analytical chemistry (journal) , chemistry , cement , composite material , organic chemistry , thermodynamics , physics , quantum mechanics , engineering , zeolite , catalysis
During the geological disposal of high‐level waste, the nuclear glass is expected to be first hydrated in water vapor prior to liquid alteration. In the present work, we investigated the vapor hydration of the International simple glass ( ISG ) at 175°C and different relative humidities (60%, 80% and 98%). The glass hydration was investigated by nuclear reaction analysis ( NRA ) and Fourier transform infra‐red spectroscopy. The chemical and mineralogical compositions of the alteration products were studied using scanning electron microscopy/energy dispersive X ‐ray spectroscopy ( SEM ‐ EDS ) and μ‐ R aman spectroscopy, respectively. The NRA results gave water diffusion coefficients of 2.31–7.34 × 10 −21 m 2 /s , in good agreement with the literature data on borosilicate glasses altered in aqueous media. The glass hydration increased with relative humidity percentage and the SEM ‐ EDS analysis showed a slight enrichment in S i and loss of N a in the hydrated glass layer compared with the pristine glass. The hydration rate of the ISG glass was little higher than that of the F rench SON 68 glass hydrated using water vapor. The corrosion products were analcime, tobermorite, and calcite, which were typical of the SON 68 glass hydrated in similar conditions.