REACTIONS IN THE PBO-B2O3-RUO2 SYSTEM AT TEMPERATURES UP TO 1473-K

The results of chemical reactions in the PbO-B2O3-RuO2 system at vario us temperatures were studied. According to x-ray diffraction (XRD) and chemical analysis data, at temperatures up to 973 K Pb2Ru2O7-x is for med. At higher temperatures this reacts with the lead borate melt to f orm RuO2; in this case the ratio of the Pb2Ru2O7-x and RuO2 phases at the same annealing temperature depends on the PbO/B2O3 ratio. The IR d ata show the structural differences between the glass phase of the com pounds studied and the structure of glasses with the same PbO/B2O3 rat io.