Electrical characterization of polycrystalline sodium β″-alumina: Revisited and resolved

Autor:	Yang Kee-Deok, Jaekook Kim, Dong-Chun Cho, Shu Yamaguchi, Jinhyung Beum, Kim Soo-Seok, Jee-Hoon Kim, Jong-Sook Lee, Eui-Chol Shin, Sansudae Lim
Rok vydání:	2014
Předmět:	Chemistry Bode plot Fast ion conductor Analytical chemistry General Materials Science General Chemistry Dielectric Activation energy Conductivity Condensed Matter Physics Thermal conduction Capacitance Dielectric spectroscopy
Zdroj:	Solid State Ionics. 264:22-35
ISSN:	0167-2738
DOI:	10.1016/j.ssi.2014.06.011
Popis:	AC 4-probe method using Au electrodes distinguished the sample conductivity of polycrystalline β ″ alumina at high temperature. Bode plots of AC 2-probe measurements revealed temperature-independent capacitance plateaus and the power-law frequency dependences, which can be described by Cole-Davidson dielectric equations. The relaxation time constants exhibit the same activation energy as the bulk conduction supporting CK1 model and current-constriction mechanism. An ideal Warburg response is identified regardless of the electrode condition. Well-defined parameters allow the simulation of AC behavior as a function of temperature as well as frequencies, which provides much informative overview of the AC characteristics of solid electrolytes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f8ac4395018657209059e789805061f7 https://doi.org/10.1016/j.ssi.2014.06.011 Zobrazit plný text záznamu Full Text from ScienceDirect