⁷Li NMR Spin‐Lattice Relaxation and Ionic Diffusion in Lithium Thioborate Glasses

Abstract

Abstract 7 Li NMR spin‐lattice relaxation rates at 16 MHz and 117 MHz have been measured at various temperatures for glasses in the non‐oxide chalcogenide system B 2 S 3 — Li 2 S — LiX with X = Cl, Br, I. As compared with the corresponding oxide glasses these materials are distinguished by a higher ionic conductivity, and the relaxation maxima are better accessible. The relaxation rates display anomalous temperature and frequency dependences. Attempts to interpret the non‐BPP‐type relaxation in terms of appropriate diffusion models are discussed.