Publikace detail

Influence of germanium oxide addition on the electrical properties of Li2O-B2O3-P2O5 glasses

Rok: 2013

Druh publikace: článek v odborném periodiku

Název zdroje: Journal of Power Sources

Název nakladatele: Elsevier Science BV

Místo vydání: Amsterdam

Strana od-do: 91-98

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	Vliv přídavku GeO2 na elektrické vlastnosti skel systému Li2O-B2O3-P2O5	Byl studován vliv GeO2 na elektrické a dielektrické vlastnosti skel připravených v kompoziční řadě (100 - x)[0.5Li(2)O-0.1B(2)O(3)-0.4P(2)O(5)]-xGeO(2), kde x = 0-25 mol.% GeO2. Elektrické a dielektrické vlastnosti byly studovány v teplotním rozsahu 183-523K, frekvenčním rozsahu 0.01 Hz-1 MHz a korelovány se strukturou skel.	lithná borofosforečnanová skla; GeO2; iontivá vodivost; elektrické moduly; dielektrická relaxace
eng	Influence of germanium oxide addition on the electrical properties of Li2O-B2O3-P2O5 glasses	Lithium ion transport upon the addition of germanium oxide in a series of mixed glass former lithium borophosphate glasses has been investigated. The electrical and dielectric properties of (100 - x)[0.5Li(2)O-0.1B(2)O(3)-0.4P(2)O(5)]-xGeO(2) with 0-25 mol% GeO2 glasses have been studied over a wide temperature (183-523 K) and frequency range (0.01 Hz-1 MHz). The increase in dc conductivity with the addition of GeO2 is attributed to the formation of ion conducting channels arising from the structural modification and formation of the P-O-Ge linkages, resulting in an easy migration of Li+ ions along these bonds. At higher GeO2 content glass network becomes more densely packed and ionic conductivity is slightly hindered as a consequence of the increase of bonding forces inside the network. Such a decrease in the conductivity is more reflection of the stronger cross-linkage in the glass network than that of the slight decrease in the Li+ ion concentration. The electrical modulus formalism is used to describe the dielectric relaxation. The scaling of the ac conductivity results in an excellent collapse onto common master curve whereas the electrical modulus spectra showed slight deviation indicating the distribution of relaxation times caused by the presence of various structural units in the glass network.	lithium germano-phosphate glasses; lithium ion conductivity; electrical modulus; dielectric relaxation

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