Vitrification of K3M2P3O12 (M=B, Al, Bi) NASICON-type materials and electrical relaxation studies

Autor:	G. Govindaraj, G. Vijaya Prakash, S. Vinoth Rathan, C.R. Mariappan
Rok vydání:	2005
Předmět:	Permittivity Materials science Condensed matter physics Anomalous diffusion Mechanical Engineering Modulus Condensed Matter Physics Ion Nuclear magnetic resonance Diffusion process Mechanics of Materials Fast ion conductor Relaxation (physics) General Materials Science Scaling
Zdroj:	Materials Science and Engineering: B. 123:63-68
ISSN:	0921-5107
DOI:	10.1016/j.mseb.2005.06.022
Popis:	Vitreous phases of K3M2P3O12 (M = B, Al, Bi) NASICON-type materials are prepared and their electrical properties are investigated over a frequency range from 42 Hz to 1 MHz and at different temperatures. An anomalous diffusion model (ADM) is applied to discuss the ac conductivity, permittivity and electric modulus of the NASICON-type glasses. The ADM is used to extract the dc conductivity and relevant physical parameters, namely, crossover length and relaxation frequency in the ion diffusion process. The dc conductivities and relaxation frequencies are thermally activated, with activation energies found to be in the range 0.70–0.82 eV. The frequency- and temperature-dependent conductivity spectra of individual glasses can be superimposed by means of the Summerfield scaling. © 2005 Elsevier B.V. All rights reserved.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e5445ff1a9a69398e395e5ee2d8e6751 https://doi.org/10.1016/j.mseb.2005.06.022 Zobrazit plný text záznamu Full Text from ScienceDirect