STRUCTURAL PROPERTIES OF Bi2O3 - PbO GLASSES DOPED WITH RARE-EARTH IONS
Pages 204-207
L. Pop, E. Culea, M. Culea, S. Rada, P. Pascuta, R. Fechete, M. Bosca, R. Chelcea
Abstract
Bi2O3 - PbO glass system with different content of rare-earth ions (Nd2O3, Eu2O3, Er2O3, CeO2, Tb4O7) have
been prepared and examined with the aim of determining their structural characteristics. Density
measurements and IR spectroscopy were used to characterize the samples. From density data we calculated
the Poisson's ratio using the Makishima and Mackenzie model, which permitted to observe the evolution of
the packing degree of the atoms in the studied glasses with increasing the content of rare-earth oxide. IR
spectra permitted to identify some of the structural units that built up the lead bismuthate vitreous network.