As-Se, As-Se-S, As-Se-TeおよびAs-Se-Tl系ガラスの粘度

摘要: The viscosity of glass in the system As-Se, As-Se-S, As-Se-Te and As-Se-Tl was measured by a new penetration viscometer2) at temperature ranging approximately from room to 285°C. results are shown Fig. 1, 2, 4, 5 6. density also determfined within same range. variation with composition summarized which show that increases steadily all temperatures As content up 45 atomic per cent. maximum cent curves is interpreted as evidence structural grouping corresponding compound As2Se3.From tine values different temperatures, apparent activation energy Ep, is, constant pressure calculated. Its given 10. Using Macedo's equation3) for containing both free volume, relation between volume Ev made clear.The effect lowering (η) ternary found order η(s)>η(Te)>η(Tl).