Masashi Nakamoto

TL;DR: In this article, a thermodynamic model for determining the surface tension of molten ionic mixtures derived by considering the ionic radii was extended to ternary silicate melts.

TL;DR: In this article, a model to evaluate the viscosity of silicate melts is proposed on the basis of the bonding states of oxygen, i.e. non-bridging oxygen and free oxygen ions, in the silicate structure, considering the flow mechanism of the melts with the network structure.

TL;DR: In this paper, the viscosity of SiO2-CaO-MgO-Al2O3 slag was measured using a rotating cylinder method at high CaO and Al 2O3 concentration regions to search for a slag with low melting temperature and low viscousity.

Abstract: Accurate measurements of surface tension of liquid metals having low capillary constants (the ratio between density (r) and surface tension (s), r/s) have been attempted using the constrained drop method. High accuracy of surface tension measurements was obtained by making a large axi-symmetric liquid drop and adopting a developed image capturing system composed of a high-resolution charge-coupled device (CCD) camera, an additional CCD camera to adjust the level of the metal drop and a He‐Ne laser.

TL;DR: In this article, the effect of the droplet size on the accuracy of surface tension measurement by the sessile drop method is discussed for liquid metals through a simulation by using the Laplace equation.