Structural, thermal, dielectric and ac conductivity properties of lithium fluoro-borate optical glasses

Abstract Transparent and stable glasses in the chemical composition of Li 2 O–LiF–B 2 O 3 –MO (M = Zn and Cd) have been prepared by a conventional melt quenching method. For these glasses, absorption spectra, structural (XRD, FT-IR, and Raman spectra), thermal (TG–DTA and DSC), dielectric ( ɛ ′, ɛ ″, tan δ ), ac conductivity ( σ ac ), and electric modulus ( M ′ and M ″) have been investigated. Amorphous nature of these glasses has been confirmed from their XRD profiles. The LFB glasses with the presence of ZnO or CdO an extended UV-transmission ability has been achieved. The measured FT-IR and Raman spectra have exhibited the vibrational bands of B–O from [BO 3 ] and [BO 4 ] units and Li–O. The dielectric properties (tan δ , dielectric constant ( ɛ ′), dielectric loss ( ɛ ″)), electrical modulus and electrical conductivity ( σ ac ) of these glasses have also been studied from 100 Hz to 1 MHz at the room temperature. Based on the trends noticed in the ac conductivities, the present glasses could be found useful as battery cathode materials.