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
powders of reagent grades of H3BO3, Bi2O3, PbO, BaO and cement kilndust (CKD) according to the chemical formula x Bi2O3 − (40 B2O3–32CKD–3 BaO)−(25−x) PbO, (0≤ x ≤ 25 mol%) in an amount sufficientto produce 50 g glass