Diffraction study of calcium aluminate glasses and melts: II. High energy x-ray diffraction on melts

Abstract

High energy x-ray diffraction measurements have been performed on CaO-Al 2 O 3 liquids suspended in a flow of pure argon for six compositions containing 50-67 mol% CaO.The results indicate that AlO 4 tetrahedra dominate the liquid structure.The radial distribution functions show a significant broadening of the Ca-O peak occurs in the liquid compared to the corresponding glass and, on average, each Ca is surrounded by approximately five oxygen atoms in the melt at a distance of 2.3 .It is also found that the structure for the eutectic (64% CaO) liquid does not change measurably with temperature between 1600 and 1970 C.