Effect of temperature on the structural characteristics and electrical/dielectric response of nacrite-NaCl nanohybrid material

Abstract The nacrite-NaCl nanohybrid material, Si 2 Al 2 O 5 (OH) 4 · (1−(α+δ))NaCl · (1−δ)H 2 O with { α  = 0.2, δ  = 0.02}, has been prepared at ambient temperature by straightforward intercalation of sodium chloride in the interlamellar space of Tunisian nacrite, a reference clay mineral. The structural identification of the elaborated nanohybrid has been determined by means of X-ray diffraction and infrared spectroscopy. Thermogravimetric analysis carried out that in-situ heat treatment of the elaborated nanohybrid induces an amorphous nanohybrid Si 2 Al 2 O 7 · (1−(α+δ))NaCl at 723 K, proceeding with heating till 923 K leads to a highly amorphous and disordered nanohybrid material labeled Si 2 Al 2 O 7 · {(1−(α+δ))/2}Na 2 O . The electrochemical impedance spectroscopy reveals that the elaborated nanohybrid exhibits a fairly high ionic conductivity up to 10 −2  S m −1 at higher temperatures and can be classified as a superionic conductor.