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<正>Glass formation range of Bi2O3—B2O3—TeO2 system has been investigated（B2O3 < 40 mol%）.Four glasses with compositions xBi2O3—3OB2O3—（70—x）TeO2（x = 40,50,60 and 70 mol%） have been prepared by using melt quenching technique.The effect of Bi2O3 co