TY - JOUR
T1 - Dc and ac Conductivities of (V2O5)x(B2O3) 1-X oxide glasses
AU - El Mkami, H.
AU - Deroide, B.
AU - Backov, R.
AU - Zanchetta, J. V.
PY - 2000/1/1
Y1 - 2000/1/1
N2 - Glasses of composition (V2O5)x(B2O3) 1-x with x = 0.1, 0.3, 0.5, 0.7 and 0.9 were obtained by a quenching technique. Conductivity measurements using σac were performed on compact pellets of these materials. The conductivity behavior in direct regime, σdc, is described by the "small polaron" model. The room temperature variation of log σdc with the activation energy of each composition, suggests an adiabatic hopping character to the conduction. Application of Hunt's model to describe the ac conductivity behavior shows that the relaxation process has a local character and can be described by hops between each pair of sites.
AB - Glasses of composition (V2O5)x(B2O3) 1-x with x = 0.1, 0.3, 0.5, 0.7 and 0.9 were obtained by a quenching technique. Conductivity measurements using σac were performed on compact pellets of these materials. The conductivity behavior in direct regime, σdc, is described by the "small polaron" model. The room temperature variation of log σdc with the activation energy of each composition, suggests an adiabatic hopping character to the conduction. Application of Hunt's model to describe the ac conductivity behavior shows that the relaxation process has a local character and can be described by hops between each pair of sites.
KW - Dielectric losses
UR - http://www.scopus.com/inward/record.url?scp=0033888398&partnerID=8YFLogxK
U2 - 10.1016/S0022-3697(99)00306-6
DO - 10.1016/S0022-3697(99)00306-6
M3 - Article
AN - SCOPUS:0033888398
SN - 0022-3697
VL - 61
SP - 819
EP - 826
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
IS - 5
ER -