Physical, chemical and electrical study of 0.1Li

The study examines the physical and chemical properties of glassy and crystalline phosphate materials, emphasizing their structure characterized by ionic bonds linking chains of divalent metal cations to non-bridging oxygen atoms. It aims to determine the influence of specific divalent cations (Cu, Cd, Zn, Ba, Pb) on the attributes of glasses formulated with the composition 0.1Li2O-0.4MO-0.5P2O5. We studied the physical and chemical properties of certain glasses, focusing on density, molar volume, glass transition temperature, and chemical durability. We also assessed their electrical characteristics and utilized IR spectroscopy for structural analysis. Key findings revealed that the glass molar volume increases with the atomic number of the divalent cation in the sequence: Vm(Cu) < Vm(Zn) < Vm(Cd) < Vm(Ba) < Vm(Pb). Furthermore, the dissolution rate follows the order: DR(Zn) < DR(Cd) < DR(Ba) < DR(Cu) < DR(Pb). The glass transition temperature (Tg) increases in the order Tg(Pb) < Tg(Cd) < Tg(Ba) < Tg(Zn) < Tg(Cu), indicating enhanced bond strength and compactness. Additionally, the divalent metal cation M2+ affects the direct current conductivity (σdc) and activation energy (Ea), with only the LiM2(PO3)5 phase forming as observed in the X-ray diffractograms of the crystalline glass related to the composition.