Characterization of new Sb 2 O 3 -based multicomponent heavy metal oxide glasses

Abstract

New Sb2O3-based multicomponent heavy metal oxide glasses in the Sb2O3-Na2O-WO3-PbO system were prepared using a conventional melt-quenching technique. Glass formation behavior of these glasses and their thermal, physical and structural properties were investigated using X-ray diffraction (XRD), scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM/EDS), differential scanning calorimetry (DSC), UV-Vis-NIR spectroscopy and Fourier transform infrared (FTIR) spectroscopy analyses according to the increasing PbO concentration by keeping the Sb2O3/WO3 ratio constant. Thermal analysis of the glasses were realized in terms of glass transition temperature (Tg), crystallization temperature (Tc/Tp), glass stability against crystallization (∆T), activation energy of the glass transition reaction (Eg) and fragility parameter (m). Density (ρ), molar volume (VM), oxygen molar volume (VO), oxygen packing density (OPD), refractive index, band gap energy (Eg), average cross-link density (c n), number of bonds per unit volume (nb) and Poisson's ratio (μcal) values were calculated for the interpretation of physical and structural properties of the glasses. FTIR spectra of the glasses were evaluated in terms of structural transformations on the glass network.

Study on optical properties of La2O3–TiO2–Nb2O5 glasses prepared by containerless processing

“…where x i and M i are the molar fraction and molecular weight of each oxide component, respectively, ρ is density of the glass sample, n i is the number of oxygen atoms in each constituent oxide [26]. The volume (V O ) of 1 mol of oxygen ions can be calculated by Shannon's ionic radii of oxygen (1.4 Å for O 2 À ), is 6.92 cm 3 .…”

Anomalous elastic behaviour of xSrO-10PbO-(90-x)B2O3 glass system

“…As PbO enters the network as modifier, O 2-ions from PbO create non-bridging oxygen (NBO) and weaken the network. This NBO formation would result in the degradation of diborate units (BO 4 units) and result in the depolymerization of the glass network [39][40]. Addition of 10 mol% PbO into the SrO-B 2 O 3 glass system in the present study has resulted in the narrowing of the anomaly region to lower SrO concentration by acting as modifier.…”

Electrical, dielectric, and optical properties of Sb 2 O 3 –Li 2 O–MoO 3 glasses

“…Antimonite glasses form a major and important family of heavy metal oxide glasses [1][2][3][4][5]. They are attractive for their low phonon energy, broad transmission spectrum, and high refractive index.…”

“…Last years an intensive attention was given to antimonite glasses because of their similar physical properties to widely used tellurite glasses without specific problems related to tellurium toxicity [1][2][3][4][5][6][7][8][9][10][16][17][18]. They have a broad thermal stability range and so they are also suitable for fiber drawing [3].…”