Structural properties and proton conductivity of the 12-tungstophosphoric acid doped aluminosilicate gels

Preparation of aluminosilicate gels bulk, containing 12-tungstophosphoric a cid (WPA) in mesopores, as well as their structural and conduction characte ristics are reported. Doped gels are prepared from aluminum-silicon alkoxid e AlSi(OR)(x), iso-propanol, water and WPA . 29H(2)O mixtures. Characterist ics of the obtained doped gels depend on the WPA content. Results such as W PA-filled mesopores and infra red (IR) band shifts indicate differences wit h respect to material obtained by mechanical alloying and interaction betwe en the WPA and aluminosilicate host framework. According to the obtained re sults, especially of the higher conductivity (sigma similar to 10(-3) S/cm) , WPA-doped aluminosilicate gel is a promising material for solid electroly tes. (C) 1999 Published by Elsevier Science B.V, All rights reserved.