Structure and dielectric constant of silver molybdophosphate mixed network former glasses

Structure and dielectric constant of silver molybdophosphate mixed network former glasses have been reported in this paper. The Fourier transform infrared (FTIR) spectroscopy has been used to investigate the effect of MoO3 on the glass network structure. The existence of characteristic absorption bands corresponding to the vibration of PO bond, P–O− mode and P–O–P bond and the presence of MoO42− anions have been ascertained from the FTIR spectra. It is observed that the increase of MoO3 content in the compositions changes the network structure by creating non-bridging oxygen caused by the breaking of long phosphate chains. It is further observed that the dielectric constant and dielectric strength of these glasses increases with the increase of MoO3 content, which is attributed to the increase of the polarizability of the glasses due to addition of MoO3.

► Structure of silver molybdophosphate glasses depends on MoO3 content. ► Vibration modes corresponding to PO, P–O−, P–O–P bond and MoO42− anion are present. ► Increase of MoO3 content causes gradual depolymerization of glass network structure. ► Thermal stability of glasses decreases with increase of MoO3 content. ► Dielectric constant and strength increase with increase of MoO3 content.