Structure and ionic conductivity in lithium—lead—borate glasses

摘要: Abstract Li 2 OPbOB O 3 and LiClLi glasses with high lithium content were prepared using CO LiCl as the starting material respectively. Although Cl does not substitute directly into BO network indicated by FTIR 11 B NMR, it serve to modify structure indirectly affecting O/(B + Pb) ratio. The conductivities of LiCl-containing found be at least two orders magnitude higher than those Co -prepared glasses. highest conductivity measured ac impedance was 2.8 × 10 −3 (Ω cm ) −1 35°C E a = 0.6 eV in glass composition 0.27 (LiCl) 0.29Li O0.09PbO0.34B . Temperature-dependent 7 NMR study shows different activated processes glasses: (1) short-range motion low activation energy temperature, which is ascribed ions on surfaces PbO 4 pyramids BO tetrahedra; (2) temperature range bonded non-bridging oxygens units. In content, associated − dominate ion (−100–200°C).