Spectroscopic and Physical Properties of --ZnO- Glasses

Bismuth glasses containing ZnO and Li 2 O were prepared by conventional melt-quench technique. ZnO is gradually substituted by Li 2 O, and its effect on various physical, thermal, and electrical conduction properties was studied and analyzed. Raman studies revealed that these glasses are mainly made up of [BiO 3 ] and [BiO 6 ] units. The density decreases and molar volume increases with the incorporation of Li 2 O into these glasses. MDSC studies have been performed on these glasses to determine the glass transition temperature and other related thermal parameters such as change in the glass transition temperature () and specific heat capacity difference (). These studies revealed that the glasses possess high values, and decreases with Li 2 O content. The trend of these properties is attributed to the changes in the glass network structure. Dc electrical conductivity revealed that the conductivity increases and activation energy decreases with Li 2 O content.