STRUCTURE MODEL OF GLASSES FOR PbO-Bi₂O₃- B₂O₃ SYSTEM CONTAINING HIGHER B₂O₃

来源期刊：中国有色金属学报(英文版)1997年第2期

论文作者：Lu Anxian Huang Jiwu Lu Renwei

文章页码：142 - 145

Key words：matted crystal; glass; structure model; boron-oxygen ring

Abstract: The glasses of B₂O₃ contents above 50%(mole percent) in PbO-Bi₂O₃-B₂O₃ system were prepared by conventional melt quenching technology. X ray, SEM and IR methods were used to examine the structural features of these glasses. The results of X ray diffraction analyses showed that the glass structure contains two kinds of matted crystals that related to the mole ratios of PbO versus Bi₂O₃ and to addition contents of B₂O₃. The compositions of the matted crystals with different mole ratios of PbO versus Bi₂O₃ ranged from 80∶20 to 20∶80 were determined. The analyses of IR showed that the structures of glasses with different mole ratios of PbO versus Bi₂O₃ contain different boron oxygen rings such as boroxol rings or triborate rings. A structural model based on the results above mentioned was presented.