Naoaki KAMIYAMA

Chemical Durability of Glasses Containing Cloride

Kazumasa MATUSITA


In recent years, attention has been melting method, which has advantages of volume reduction and stabilization of incineration ashes.
The slag melted under reduced atmosphere contains chlorides derived from municipal waste.
However, there have been few studies of slag containing chloride.
In this study, the glasses similar to slag and containing chlorides were prepared, and the chemical durability was investigated by powder method.
As a result, it was found that glasses containing chloride have higher chemical durability than chloride-free glasses.
However, in the case of the glasses which contained the chloride higher than 10 mol%, layer of a chloride deposited on the surface and durability become poor.
The investigation carried out by Raman spectrometry and Vickers hardness test demonstrated that the number of bridging oxygen increases, and consequently chemical durability is improved, as the chloride content increases.