Electrical conductivity of the ferroelectric sodium vanadate, potassium vanadate, lithium vanadate and their solid solutions

Abstract

The d.c. electrical conductivity of sodium vanadate, potassium vanadate, lithium vanadate and their solid solutions sodium-potassium vanadate, sodium-lithium vanadate were measured by a two-probe method in the temperature range covering their transition points. These materials show sharp change in conductivity at their phase transition temperatures. In sodium, potassium and lithium vanadates an exponential increase in d.c. conductivity is observed in ferroelectric region while discontinuities are observed above the transition temperatures. The activation energy in paraelectric state of the solid solutions is found to be higher than in ferroelectric state. In solid solutions the activation energy depends upon sodium vanadate concentration.

K2CaV2O7: a pyrovanadate with a new layered type of structure in the A2BV2O7family

“…Vanadium (V) alkaline and alkaline-earth metal oxides display promising physical properties (electrical, optical, catalytic, etc.). [1][2][3][4][5][6][7][8][9][10][11] Therefore, any additional information about the synthesis and the crystal structure of these systems, and about phase relations in corresponding systems, is of great interest.…”

Crystal structure of RbBaVO4 and high-pressure modification of KCaVO4

“…Vanadium (V) alkaline and alkaline-earth metal oxides display promising physical properties (electrical, optical, catalytic, etc. ) (Klement and Kress, 1961;Badini et al, 1999;Saracco et al, 1999a;Falcón et al, 2004;Zubkov et al, 2009;Slobodin et al, 2010;Gąsior et al, 1979;Inoue et al, 2002;Yamauchi et al, 2004;Patil et al, 1987;Saracco et al, 1999b;Yamaura et al, 2004). Therefore, any additional information about the synthesis and the crystal structure of these systems, and about phase relations in corresponding systems, is of great interest.…”