Investigations were made of the structure and diffusion behavior of lithium silicate glasses, and their interfaces with lithium lanthanum titanate crystals. The short and medium range structures of the lithium silicate glasses were characterized and the ceramic/glass interface models were obtained. The lithium ion diffusion behaviors in the glass and across the glass/ceramic interfaces, as well as the effect of atomic structure upon diffusion behavior, were investigated. It was found that there existed a minor segregation of lithium ions at the glass/crystal interface. The lithium ion diffusion energy interface barrier was found to be dominated by the glass phase.

Structure and Lithium Ion Diffusion in Lithium Silicate Glasses and at Their Interfaces with Lithium Lanthanum Titanate Crystals. Du, J., Chen, C.H.: Journal of Non-Crystalline Solids, 2012, 358[24], 3531-8