Influence of composition of sodium aluminoborosilicate melts containing nickel and calcium oxides on the wetting angle on platinum

The influence of the composition of sodium aluminoborosilicate melts containing nickel and calcium oxides on the wetting angle on platinum has been studied by the method of “small drop on thin thread.” It is shown that partial mutual replacement of silicon, aluminum, and boron oxides (up to 4 mol %) does not substantially change the wetting angle. The wetting angle increases after the partial replacement of these oxides by calcium oxide and decreases after their replacement by nickel oxide. Since a change in the surface tension of melts in the composition range studied is insignificant, the work of adhesion and the “glass melt-metallic substrate” interfacial tension are determined by the wetting angle. The maximum work of adhesion and the minimum interfacial tension are characteristic of melts with an increased nickel oxide content, and the minimum work of adhesion and the maximum interfacial tension are observed for melts with an increased calcium oxide content.