Effect of Aliovalent Cation Doping on the Electrical Conductivity of Na2SO4: Role of Charge and Size of the Dopant

On the Various Approaches to Enhancing the Conductivity of Sodium Sulfate: Review and Current Developments

“…Thus, it appears that the size or some factor other than the vacancy concentration does indeed play a role and is discussed later. The maximum conductivity among the binary systems studied by Singhvi et al (48) was reported for the 4 m/o Sm> and La> compositions, in agreement with the "ndings of Prakash and Shahi (35).…”

“…It is fair to state that neither of the opposing views was based on studies involving a large number of binary systems. This prompted Singhvi et al (48) In Fig. 1, the DSC plots for the 2 m/o compositions of various cations show that the peak at 2413C in pure Na SO is pretty much present around the same temperature for the doped compositions.…”

Ionic Conductivity of Na2SO4–Al2O3 Composite Electrolytes: Mechanism and the Role of the Preparatory Parameters

“…Our data seem to resemble a combination of Type II and Type III behavior as classi"ed and later suggested by Brailsford. Type II behavior is given by [4] where + and represent the conductivity of the composite and host, respectively, F is the alumina volume fraction, and is a model parameter. Type III behavior is given by…”

Co‐doping effect of Fe2O3 on the ionic transport of Na2SO4

“…Additionally, Uvarov et al reported a phase transition temperature to superionic state 100 degrees lower than in the pure salt [19]. For Na 2 SO 4 , however, several workers have tried to enhance the conductivity of the phase I and stabilize it at room temperature by cationic and anionic substitution [9,20,21]. Some studies reported conductivity enhancement through composite formation by using Al 2 O 3 .…”

“…0.5 10 -5 S/cm at 300 °C [6], for practical applications. Therefore, several workers have tried to enhance the conductivity of phase I and stabilize it at room temperature by cationic and anionic substitution [7][8][9], and composite formation. Composite solid electrolytes may be regarded as two-phase mixture, of a poor ionic conductor and a highly dispersed inert matrix of insulator, whose conductivity exceeds that of the pure components.…”