Structure and emission properties of P2O5-Na2O-Pb3O4-MO, (MO = SrO, Y2O3, MoO3, Ag 2O, CdO and SnO) glass and glass ceramics

A group of glass and glass ceramic solids with compositions of 70%P2O5-20%Na2O-9%Pb3O4-1%MO, where MO refers to SrO, Y2O3, MoO3, Ag2O, CdO and SnO were prepared by rapid quenching from molten state. The random environment of all obtained samples was verified by X-ray diffraction. Several phosphate groups and bands in addition to the presence of P-O-M and M-O-M linkages are evidenced by IR spectroscopy. The density and molar volume values of the studied samples were found to depend on the relative constituent dopant molecules and the experimental values are found to exhibit approximately the same behavior as the theoretically obtained values. The characteristic temperatures are also studied by the DTA analysis, where the thermal constancy of the samples is showed to grow up with moving rightward in the periodic table from Sr to Sn ion. All the samples are found to be of the diamagnetic type, with a major magnetic effect played by the Na+ ions. The studied samples are found to emit light with different colors when excited by a light with 365 nm wavelength. The obtained CCT, CRI and LER values nominates the present glasses to be involved in manufacturing solid state light sources for high cool light applications.