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Structure and electrical properties of Li2O-ZnO-P2o5 glasses


Moguš-Milanković, Andrea
Structure and electrical properties of Li2O-ZnO-P2o5 glasses, 2009. (pozvano redavanje).


Naslov
Structure and electrical properties of Li2O-ZnO-P2o5 glasses

Autori
Moguš-Milanković, Andrea

Izvornik
Institut fur Physikalische Chemie and SFB 458, Munster Universitat, Germany

Vrsta, podvrsta
Ostale vrste radova, pozvano redavanje

Godina
2009

Ključne riječi
Li-phosphate; electrical conductivity; dielectric properties

Sažetak
The effect of compositional changes observed by replacing ZnO with Li2O in xLi2O(40-x)ZnO-60P2O5, (0<x<40), glasses on the electrical and dielectric properties have been investigated. Glasses were analyzed by different thermal analysis (DTA), Raman and Impedance Spectroscopy in the frequency range from 0.01 Hz to 4 MHz and temperature range from 303 to 473 K. The addition of Li2O up to 20 mol%, give rise to the discrete reorganization of phosphate cross-linked network with formation of the isolated Li-O polyhedra. This initial reconstruction of predominantly metaphosphate structure is consistent with the observed decrease in the Tg, electrical conductivity and dielectric permittivity. Further addition of Li2O content up to 40 mol%, results in the beginning of depolymerization of phosphate network with breaking of the P-O-P bonds and conversion of the Q3 to Q2 units. The initial depolymerization, not sufficiently balanced, causes a drop in conductivity and dielectric permittivity due to the blocking of the conduction pathways for Li+ ions. With increasing Li2O content up to 40 mol% the values of electrical conductivity increase for five orders of magnitude indicating ionic conductivity. This increase coincides with an increase in the ionic interconnection of the network and an increase in the strength of phosphate structure.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekt / tema
098-0982929-2916 - Utjecaj strukture na električna svojstva (bioaktivnih) stakala i keramike (Andrea Moguš-Milanković, )

Ustanove
Institut "Ruđer Bošković", Zagreb

Profili:

Avatar Url Andrea Moguš-Milanković (autor)

Citiraj ovu publikaciju

Moguš-Milanković, Andrea
Structure and electrical properties of Li2O-ZnO-P2o5 glasses, 2009. (pozvano redavanje).
Moguš-Milanković, A. (2009) Structure and electrical properties of Li2O-ZnO-P2o5 glasses. Institut fur Physikalische Chemie and SFB 458, Munster Universitat, Germany. Pozvano redavanje.
@unknown{unknown, author = {Mogu\v{s}-Milankovi\'{c}, A.}, year = {2009}, keywords = {Li-phosphate, electrical conductivity, dielectric properties}, title = {Structure and electrical properties of Li2O-ZnO-P2o5 glasses}, keyword = {Li-phosphate, electrical conductivity, dielectric properties} }