The present paper aims at growth of silver nanoparticles in the tellurovanadate glassy matrix, structural verification
including determination of the size of nano-crystals and lattice strain using Williamson-Hall approach,
evaluation of energy band gap and the width of the localized states (Urbach energy) and comparison of the
obtained results with the previously reported data for corresponding glasses. So, the bulk and blown-layer glasssystems
of xAg2O-40TeO2-(60-x)V2O5 compositions with different molar concentrations (0≤x≤50), were
converted to glass-ceramics using heat treatment. To investigate the optical properties, optical absorption
spectra of layer samples were recorded within the wavelength range of 190–1100 nm. So, the energy band gap
and the width of the localized states (Urbach energy) were determined using the high precision derivation of
absorption spectrum fitting (DASF) method, and the obtained results show the major increase compared with
those corresponding glasses, implying on the formation of nano-crystals in glassy matrix (glass-ceramics). The
Williamson-Hall method was used to determine the size of nano-crystals and lattice strain. Among the samples,
sample with x=40 has the lowest lattice strain (with high elastic moduli, promising it as coating materials) and
sample with x=30 has the lowest size in nano-phase. It was found that, in spite the outputs of Scherrer̛ s
formula, the results of the crystallite size measured by Williamson-Hall method were in good agreement with
FESEM results; such results confirm the validity of Williamson-Hall approach for X-ray peak variance analysis.