Authors
Xiaoyan Yu, Delbert E Day, Gary J Long, Richard K Brow
Publication date
1997/7/1
Journal
Journal of non-crystalline solids
Volume
215
Issue
1
Pages
21-31
Publisher
North-Holland
Description
Selected properties of phosphate glasses, containing from 14 to 43 mol% Fe2O3 and up to 13 mol% Na2O, have been measured. With increasing Fe2O3 and Na2O content, the density and dilatometric softening temperature increased, whereas, the thermal expansion coefficient and dissolution rate in water or saline at 90°C decreased. Glasses containing more than 25 mol% Fe2O3 had an exceedingly good chemical durability. Their dissolution rate at 90°C in distilled water or in saline solution was up to 100 times lower than that of window glass. Mössbauer and X-ray photoelectron spectroscopy indicate that iron(II) and iron(III) were both present in the glasses and the chemical durability improved with increasing iron(III) concentration. The outstanding chemical durability of these glasses was attributed to the replacement of POP bonds by more chemically resistant POFe(II) and POFe(III) bonds.
Total citations
Scholar articles
X Yu, DE Day, GJ Long, RK Brow - Journal of non-crystalline solids, 1997