Electrical conduction properties of rare earth orthophosphates under reducing conditions

Autor:	Yoichi Tomii, Yoshiharu Uchimoto, Koji Amezawa, Naoichi Yamamoto, Naoto Kitamura, Teiichi Hanada
Rok vydání:	2006
Předmět:	Chemistry Electrical conduction Monazite Rare earth Kinetic isotope effect Analytical chemistry Mineralogy chemistry.chemical_element General Materials Science General Chemistry Condensed Matter Physics Thermal conduction Oxygen
Zdroj:	Solid State Ionics. 177:2369-2373
ISSN:	0167-2738
DOI:	10.1016/j.ssi.2006.06.009
Popis:	Electrical conduction properties of Sr-doped PrPO4, NdPO4 and SmPO4 with the monazite structure were investigated at 500–925 °C under H2/H2O reducing conditions. From H/D isotope effects and p(H2)-dependencies of the conductivities, it was found that the materials dominantly conducted protons under the wet reducing conditions although the materials slightly showed n-type electronic conduction at higher temperatures. Based on p(H2O) and p(H2)-dependencies of the conductivities, defect structures of the materials under the reducing conditions were discussed. As a result, it was considered that major positive defects were oxygen deficits at higher temperatures and protons at lower temperatures.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5d66112f0a278f614077ebd975888c04 https://doi.org/10.1016/j.ssi.2006.06.009 Zobrazit plný text záznamu Full Text from ScienceDirect