Abstract
A range of opal or transparent porous phosphosilicate glasses have been prepared by quenching melted mixtures of Moroccan natural phosphate, diatomite and/or dolomie. Their physical and chemical properties such as density, glass transition temperature, thermal expansion coefficient and chemical durability are studied upon the chemical composition. Adding dolomite to an opal glass favors the elaboration of transparency one, increases the glass transition Tg, reduces thermal expansion and improves the chemical durability.
