Untitled

Thermal expansion and transition temperature of glasses in the systems BeO–Al2O3–B2O3 and MgO–Al2O3–B2O3

“…Reagent-grade chemicals BeCO 3 , MgCO 3 , H 3 BO 3 and Al(OH) 3 were used as batch materials. Glasses (20-30 g) were melted in a platinum crucible at temperature 1400-1500°C for 1 h. Melts were poured into a steel mould, glasses were annealed at temperatures near to the proposed transition temperature.…”

“…This report has represented the results of the work which has developed the earlier started investigations of dilatometric properties of borate and aluminoborate glasses [1][2][3][4]. Some of these results are included in a report given at the 5th International Conference on Borate Glasses, Crystals, and Melts [5].…”

“…Some of these results are included in a report given at the 5th International Conference on Borate Glasses, Crystals, and Melts [5]. The work under discussion has represented some further data on beryllium aluminoborate and magnesium aluminoborate glasses and made comparison between their properties and those of the earlier investigated aluminoborate glasses including the oxides of barium, strontium, and calcium [1][2][3][4][5]. In our work, we aim to link dilatometric properties and structural features of glasses determined by more direct physical methods, mainly by NMR (see e.g.…”