Continuous Measurement Of The Dissolution Rate Of Ions From Glasses

A method for measuring the early stage ion release of gases was developed in order to gain information on leaching kinetics and chemical resistance of glasses in aqueous environments. A continuous flow-through-reacotr was designed in which the aqueous solution is fed through a bed of glass particles and the dissolved ions continuously recorded with a sensitive on-line analysis system. Experimental parameters, such as solvent flow rate and temperature, could easily be adjusted according to the needs. The flow-through-reactor system was tested with powdered samples of float and lead glasses, E-glass and bioactive glasses 45S5 and 1-98, all of which showed very different chemical durability in aqueous environments.