Properties of some glass-ceramics in molten and solid state

The present contribution represents only a part of the first stage of a greater research program regarding some inert materials obtained by solid residue vitrification . The programe aims at finding a correlation between mechanical and chemical stabilities of several oxidic glasses prepared by us such as to reproduce the real residue compositions. Microhardness together with leaching tests were carried out in order to establish the extent the oxide additions improve the glass physico-chemical properties. These data were completed with electrical conductivity measurements on glass melts because conductivity is very sensitive to composition changes and therefore can contribute as an appropriate method to choosing a stable glass from among a large variety of compositions.