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Effect of Aluminum Fluoride on the Physical Properties and Stability of Fluorozirconate and Fluorozirco‐Hafnate Glasses
Author(s) -
Sanghera Jasbinder S.,
Hart Patricia,
Sachon Maria G.,
Busse Lynda,
Aggarwal Ishwar
Publication year - 1990
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.1151-2916.1990.tb06745.x
Subject(s) - fluoride , thermal stability , zirconium , barium , aluminium , mineralogy , barium fluoride , materials science , chemistry , analytical chemistry (journal) , chemical engineering , composite material , inorganic chemistry , metallurgy , organic chemistry , physics , nuclear physics , engineering
The glass quality, physical properties, and thermal stability of fluorozirconate and fluorozirco‐hafnate glasses were investigated as a function of the AIF 3 content. The AlF 3 concentration varied from 2 to 3.25 mol%. The ratio of the other components was constant, except for 50% substitution of ZrF 4 by HfF 4 in the fluorozirco‐hafnate glasses. The physical properties of all the glasses were not affected strongly by the AlF 3 content. However, the fluorozirco‐hafnate glasses were prone to precipitate out AlF 3 microcrystals for AlF 3 contents greater than 3 mol%. The thermal stability of the glasses revealed a compositional dependence only in the case of the fluorozirco‐hafnate glasses. The thermal stability decreased as the AlF 3 content increased above 3 mol%. The authors concluded that the AlF 3 microcrystals nucleated other fluoride phases such as zirconium‐barium fluoride crystals.