Electrical conduction behavior in (La0.9Sr0.1)MIIIO3−δ (MIII=Al, Ga, Sc, In, and Lu) perovskites

Autor:	S Tanase, K Nomura
Rok vydání:	1997
Předmět:	Aluminium oxides Chemistry Inorganic chemistry General Chemistry Activation energy Conductivity Condensed Matter Physics Thermal conduction Crystallography Electrical resistivity and conductivity Electrical conduction Ionic conductivity General Materials Science Perovskite (structure)
Zdroj:	Solid State Ionics. 98:229-236
ISSN:	0167-2738
DOI:	10.1016/s0167-2738(97)00101-x
Popis:	Oxide ion conduction in A 3+ B 3+ O 3 -type perovskites, (La 0.9 Sr 0.1 )M III O 3− δ (M III =Al, Ga, Sc, In, and Lu) has been investigated as a function of crystallographic free volume ( V f ), taking the distortion from `ideal' cubic structure into consideration. The Ga compound, whose V f is ca. 13 A 3 , showed the maximum conductivity of 8.1×10 −2 S cm −1 (at 980°C, in N 2 ) and the minimum activation energy of 0.60 eV (from 730–980°C, in N 2 ) for oxide ion conduction. This behavior arises from the balance between an increase in V f and a decrease in symmetry in the perovskite structure.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a70ee3c2125eb882b0dcfe4b0008d548 https://doi.org/10.1016/s0167-2738(97)00101-x Zobrazit plný text záznamu Full Text from ScienceDirect