The nominal glass compositions (the starting mixture [Table 1])
were prepared by the conventional melt-quenching method from
powders of reagent grades of H3BO3, Bi2O3, PbO, BaO and cement kiln
dust (CKD) according to the chemical formula x Bi2O3 − (40 B2O3–32
CKD–3 BaO)−(25−x) PbO, (0≤ x ≤ 25 mol%) in an amount sufficient
to produce 50 g glass