Structural investigation of doped lithium borate glasses

✍ Scribed by M Massot; E Haro; M Oueslati; M Balkanski; A Levasseur; M Menetrier

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 569 KB
• Volume: 3
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/0921-5107(89)90178-5

✦ Synopsis

Vitreous fast ionic conductors with lithium ion carriers have been obtained in the terna~ ,X (with, if n=l, Cl, Br or I and, if n = 2,. The ionic" conductivity of such materials becomes increasingly important as the lithium oxide and lithium salt contents increase. In attempting to understand the mechanism responsible for the large ionic conduc-tivi~', structural investigations were performed by optical spectroscopy (Raman scattering and 1R reflectivio'). By comparison with the structure of the binary glasses, structural changes of the O-B network induced by the lithium salt addition are observed. "lhe modifications are attributed to interactions between the network and the anions of the "doping salt". It is also reported that the nature of the anion plays an important role in the observed effects. Different mechanisms depending on the oxygen-to-boron ratio are proposed to explain the interactions between the different salts and the network. 7he influence of these modifications on the ionic conductivity is also discussed.