Repozytorium publikacji - Politechnika Gdańska

We investigated the ac and dc conductivity in 50V2O5-(50 − x)P2O5-xA2O (A = Li, Na, K) glasses as a function of temperature. The measurements were carried out in the frequency range from 10−4 to 107 Hz. For all compositions, the dc conductivity decreased with the increasing alkali ion content. The decrease in conductivity was more pronounced for larger alkali ions. The ac conductivity exhibited a universal dynamic response: σac = Aωs(T). For glasses containing less than 10 mol% of alkaline ions, the exponent s(T) temperature dependence was typical as that for electronic conducting glasses and decreased from a value near to unity at a low temperature (153 K) to 0.5 at 423 K. A small variation only (from 0.99 to 0.95) of s(T) was observed in the mixed electronic-ionic regime. This behavior is known as nearly constant loss (NCL). We found that the NCL behavior could be observed in a very wide range of temperature and frequency in mixed electronic-ionic conducting glasses.

Autorzy

• dr hab. inż. Ryszard Jan Barczyński link otwiera się w nowej karcie ,
• Paulina Król link otwiera się w nowej karcie ,
• prof. dr hab. inż. Leon Murawski link otwiera się w nowej karcie