Continuous measurement of the dissolution rate of ions from glasses

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Taipale S, Ek P, Hupa M, Hupa L
Publication year: 2008
Journal: Advanced Materials Research
Journal acronym: ADV MAT RES
Volume number: 39-40
Issue number: Glass
Start page: 341
End page: 346
Number of pages: 6
ISSN: 1022-6680


Abstract

A method for measuring the early stage ion release of glasses was developed in order to gain information on leaching kinetics and chem. resistance of glasses in aq. environments. A continuous flow-​through-​reactor was designed in which the aq. soln. is fed through a bed of glass particles and the dissolved ions continuously recorded with a sensitive online anal. system.

Exptl. parameters, such as solvent flow rate and temp., could easily be adjusted according to the needs. The flow-​through-​reactor system was tested with powd. samples of float and lead glasses, E-​glass and bioactive glasses 45S5 and 1-​98, all of which showed very different chem. durability in aq. environments. The reactor was connected to inductively coupled plasma optical emission spectrometry (ICP-​OES) and concns. of the dissolved ions were measured simultaneously online every 30-​40 s. In this work the initial stages of ion release were measured during the first 15 min of the leaching expts. at 40° and 80°. The results were compared with std. water durability test of the glasses. The dissoln. of the glasses according to both methods showed similar behavior.


Keywords

chemical durability, continuous ion release measurement, glass, ICP-OES

Last updated on 2019-17-11 at 04:37