Title of article :
Conductivity study of a new protonic conductor Rb1.12(NH4)0.88SO4·Te(OH)6
Author/Authors :
Ktari، نويسنده , , Lilia and Dammak، نويسنده , , Mohamed and Madani، نويسنده , , Adel and Mhiri، نويسنده , , Tahar and Kolsi، نويسنده , , Abdel Waheb، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2001
Abstract :
Single crystals of Rb1.12(NH4)0.88SO4·Te(OH)6 were obtained by slow evaporation at 300 K. Differential scanning calorimetry showed an anomaly at 418 K, two shoulders at 482 and 510 K and one strong peak at 517 K. X-ray diffraction shows that the first DSC peak at 418 K passes the material from paraelectric to ferroelectric phase. A conductivity study shows that the shoulder at 482 (which masks a second one at about 458 K) can be attributed to a superprotonic phase transition. Dielectric constant and dissipation factor evolutions indicate that the peak at 458 K is probably due to a ferroelectric–paraelectric phase transition. The strong peak at 517 K was attributed to the decomposition of the salt.
Keywords :
Rubidium ammonium sulfate tellurate , Ferroelectric phase , Protonic conduction , Paraelectric phase
Journal title :
Solid State Ionics
Journal title :
Solid State Ionics