Influenceof Composition of Sodium Aluminoborosilicate Melts Containing Nickel and Calcium Oxides on the Wetting ngle on Platinum

摘要

The influence of the ocmposition of sodium aluminoborosilicate melts ocntaining nickel and calcium oxides on the wetting angle on platinum has been studied by te method of "small drop on thin thread." Irt is shown that partial mutual repacement of silicon,aluminum,and boron xodes (up to 4 mol%) does not substantially change the wetting angle.The wetting angle increases after the partial replacement of these oxides by calcuium oxide and decreases after their replacement by nickel oxide.Since a change in the surface tension of metlts in the compositon 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 metlts with anincreased nickel oxide content,and the minimum work of adhesion and the maximum interfacial tensiona re observed for melts with an increased calcium oxide content.