FORMATION OF COLLOIDAL PARTICLES IN MELTS OF THE CACL2-CAO SYSTEM - AHIGH-TEMPERATURE X-RAY-DIFFRACTION STUDY

A melted CaCl2-CaO system containing 0, 5, 10, and 15 mol % of calcium oxide was studied by the X-ray diffraction method at 1053 K. The part icles of a solid phase were discovered in situ in the melt. The sizes of these particles calculated from the half-widths of the scattered X- ray radiation intensity maxima varied from 11 to 32 nm. The structural parameters were determined for the Liquid part of a system, and it wa s revealed that the radius of the first coordination sphere changes in proportion with the liquidus line at the phase diagram or a system, w hereas the first coordination number tends to increase as the amount o f calcium oxide in a mixture increases.