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.
|Number of pages||6|
|Journal||Advanced Materials Research|
|Publication status||Published - 2008|
|MoE publication type||A1 Journal article-refereed|
- chemical durability
- continuous ion release measurement