B2O3基2成分酸化物融体の粘度ならびに溶融塩の粘性特性

飯田 孝道, 川本 正幸, 奥田 博文, 森田 善一郎

doi:10.2355/tetsutohagane1955.73.3_469

A clear understanding of characteristic features of molten salts requires quantitative discussions on their network structures. From this point of view, viscosities of pure molten borate and borate-base binary oxides, in which network structures would be formed, have been measured by using an oscillating-plate viscometer. Furthermore, characteristic features of viscosity of molten salts have been discussed on the basis of model theories. The results obtained are as follows: (1) Viscosities of molten B₂O₃ are expressed in the following non-Arrhenius equation: μ=0.103 exp (5.17×10⁷/RT²) (in Pa·s) (2) As compared with the viscosities of molten B₂O₃, the viscosities of molten B₂O₃-2mol% SiO₂ are high, while the viscosities of molten B₂O₃-2mol% ZnO, BaO, PbO, Na₂O are low in that order. This order corresponds approximately to that of the relative strength of acidity→basicity for the oxides. (3) Since network forming melts have higher viscosity values, positive deviations from the viscosities calculated by using an equation for simple melts would provide a quantitative approach to the network structures of melts.

B<SUB>2</SUB>O<SUB>3</SUB>基2成分酸化物融体の粘度ならびに溶融塩の粘性特性

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