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Dielectric Investigation of Electrical Conductivity in the Copper Salt of the 12-Tungstophosphoric Acid Hydrate by T. Čajkovski; M. Davidović; P. Pissis; G. Polizos; D. Čajkovski; V. Likar-Smiljanić; R. Biljić; Z. Nedić; U.B. Mioč is a Materials Science article available to read on EtoBox.

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The electrical and dielectric properties of the copper salt of 12-tungstophosphoric acid (WPA) hydrate have been investigated by broadband dielectric relaxation spectroscopy (DRS). This work is a continuation of our previous investigations on the influence of monovalent and bivalent cations on the dielectric properties of WPA hydrates salts. Measurements were made in the frequency range 10 mHz -1 MHz in order to explore the long-range dynamics, following recent microwave measurements aiming at the local dynamics properties. Experiments were done in the temperature interval 293 -350 K. Data treatment included complex permittivity e\*, complex electric modulus M\* and complex impedance Z\* formalism, Arrhenius diagram and Cole -Cole diagrams. The results are discussed in terms of conductivity relaxation and conductivity current relaxation. Rather long conductivity relaxation times measured seem to correspond to ion jumping processes. A phase transition was observed at 323 K.

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Author

T. Čajkovski; M. Davidović; P. Pissis; G. Polizos; D. Čajkovski; V. Likar-Smiljanić; R. Biljić; Z. Nedić; U.B. Mioč

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0167-2738)

Published

2003

Language

EN

Field

Materials Science (Physical Sciences)