Инд. авторы:	Wu X., Zhang B., Xu J., Katsura T., Zhai S., Yoshino T., Manthilake G., Shatskiy A.
Заглавие:	Electrical conductivity measurements of periclase under high pressure and high temperature
Библ. ссылка:	Wu X., Zhang B., Xu J., Katsura T., Zhai S., Yoshino T., Manthilake G., Shatskiy A. Electrical conductivity measurements of periclase under high pressure and high temperature // Physica B: Condensed Matter. - 2010. - Vol.405. - Iss. 1. - P.53-56. - ISSN 0921-4526.
Внешние системы:	DOI: 10.1016/j.physb.2009.08.036; SCOPUS: 2-s2.0-71549139398;
Реферат:	eng: The electrical conductivity of sintered polycrystalline periclase has been measured at 20 GPa and temperatures up to 1700 K with a KAWAI-type multi-anvil apparatus. Arrhenius plot of the electrical conductivity shows two linear regions, implying a change of charge transport mechanism with temperature in this experiment. At temperatures below 700 K small polaron conduction dominates, with an activation energy of 0.2 eV. At higher temperatures, the activation energy is determined to be 1.18 eV, which is much higher than 0.2 eV at low temperature. Our observations suggest the high-temperature conduction is attributed to a large polaron process with magnesium vacancy trapping hole on oxygen. © 2009 Elsevier B.V. All rights reserved.
Ключевые слова:	Ionic conduction; Large polaron; Periclase; Charge transport mechanisms; Electrical conductivity; Electrical conductivity measurements; Activation energy; Sintering; Polarons; Oxygen; Magnesium; Ionic conduction; Electrical conductivity; Arrhenius plots; Vacancy trapping; Small polarons; Sintered polycrystalline; Periclase; Multi-anvil apparatus; Low temperatures; Linear region; Higher temperatures; High-temperature conduction; High pressure and high temperature; Electric conductivity;
Издано:	2010
Физ. характеристика:	с.53-56