Effect of Al doping on crystal structure and electrical conduction properties of LaGa0.9Mg0.1O2.95 perovskite compound

Masahiro Kajitani, Motohide Matsuda, Michihiro Miyake

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Doping effects of Al on crystal structures and electrical conductivities of LaGa0.9Mg0.1O2.95 perovskite compounds were investigated. As the amount of doping with Al increased, the symmetry of structure changed to the orthorhombic → the rhombohedral → the cubic, which is reportedly favorable for oxide ion conduction, and lattice parameters decreased monotonically. The Al-doped LaGa0.9Mg0.1O2.95 compounds showed mixed (hole and ion) conduction in air and pure oxide ion conduction in low oxygen partial pressure. The oxide ion conductivities decreased with Al contents in spite of the cubic structure formation. The degradation in oxide ion conduction was attributable to narrowed oxide ion conduction paths in Al-doped structures.

Original languageEnglish
Pages (from-to)355-358
Number of pages4
JournalSolid State Ionics
Volume178
Issue number5-6
DOIs
Publication statusPublished - Mar 2007

Fingerprint

Perovskite
Oxides
Crystal structure
Doping (additives)
Ions
conduction
crystal structure
oxides
ions
conductivity
Partial pressure
Lattice constants
partial pressure
perovskite
lattice parameters
degradation
Oxygen
Degradation
electrical resistivity
air

Keywords

  • Al doping
  • Crystal structure
  • Free volume
  • Lanthanum Gallate
  • Oxide ion conductor
  • Perovskite
  • Tolerance factor

ASJC Scopus subject areas

  • Electrochemistry
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • Condensed Matter Physics

Cite this

Effect of Al doping on crystal structure and electrical conduction properties of LaGa0.9Mg0.1O2.95 perovskite compound. / Kajitani, Masahiro; Matsuda, Motohide; Miyake, Michihiro.

In: Solid State Ionics, Vol. 178, No. 5-6, 03.2007, p. 355-358.

Research output: Contribution to journalArticle

Kajitani, Masahiro ; Matsuda, Motohide ; Miyake, Michihiro. / Effect of Al doping on crystal structure and electrical conduction properties of LaGa0.9Mg0.1O2.95 perovskite compound. In: Solid State Ionics. 2007 ; Vol. 178, No. 5-6. pp. 355-358.
@article{a8801f6caf094b478512cce2dd46a186,
title = "Effect of Al doping on crystal structure and electrical conduction properties of LaGa0.9Mg0.1O2.95 perovskite compound",
abstract = "Doping effects of Al on crystal structures and electrical conductivities of LaGa0.9Mg0.1O2.95 perovskite compounds were investigated. As the amount of doping with Al increased, the symmetry of structure changed to the orthorhombic → the rhombohedral → the cubic, which is reportedly favorable for oxide ion conduction, and lattice parameters decreased monotonically. The Al-doped LaGa0.9Mg0.1O2.95 compounds showed mixed (hole and ion) conduction in air and pure oxide ion conduction in low oxygen partial pressure. The oxide ion conductivities decreased with Al contents in spite of the cubic structure formation. The degradation in oxide ion conduction was attributable to narrowed oxide ion conduction paths in Al-doped structures.",
keywords = "Al doping, Crystal structure, Free volume, Lanthanum Gallate, Oxide ion conductor, Perovskite, Tolerance factor",
author = "Masahiro Kajitani and Motohide Matsuda and Michihiro Miyake",
year = "2007",
month = "3",
doi = "10.1016/j.ssi.2007.01.005",
language = "English",
volume = "178",
pages = "355--358",
journal = "Solid State Ionics",
issn = "0167-2738",
publisher = "Elsevier",
number = "5-6",

}

TY - JOUR

T1 - Effect of Al doping on crystal structure and electrical conduction properties of LaGa0.9Mg0.1O2.95 perovskite compound

AU - Kajitani, Masahiro

AU - Matsuda, Motohide

AU - Miyake, Michihiro

PY - 2007/3

Y1 - 2007/3

N2 - Doping effects of Al on crystal structures and electrical conductivities of LaGa0.9Mg0.1O2.95 perovskite compounds were investigated. As the amount of doping with Al increased, the symmetry of structure changed to the orthorhombic → the rhombohedral → the cubic, which is reportedly favorable for oxide ion conduction, and lattice parameters decreased monotonically. The Al-doped LaGa0.9Mg0.1O2.95 compounds showed mixed (hole and ion) conduction in air and pure oxide ion conduction in low oxygen partial pressure. The oxide ion conductivities decreased with Al contents in spite of the cubic structure formation. The degradation in oxide ion conduction was attributable to narrowed oxide ion conduction paths in Al-doped structures.

AB - Doping effects of Al on crystal structures and electrical conductivities of LaGa0.9Mg0.1O2.95 perovskite compounds were investigated. As the amount of doping with Al increased, the symmetry of structure changed to the orthorhombic → the rhombohedral → the cubic, which is reportedly favorable for oxide ion conduction, and lattice parameters decreased monotonically. The Al-doped LaGa0.9Mg0.1O2.95 compounds showed mixed (hole and ion) conduction in air and pure oxide ion conduction in low oxygen partial pressure. The oxide ion conductivities decreased with Al contents in spite of the cubic structure formation. The degradation in oxide ion conduction was attributable to narrowed oxide ion conduction paths in Al-doped structures.

KW - Al doping

KW - Crystal structure

KW - Free volume

KW - Lanthanum Gallate

KW - Oxide ion conductor

KW - Perovskite

KW - Tolerance factor

UR - http://www.scopus.com/inward/record.url?scp=33947199735&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33947199735&partnerID=8YFLogxK

U2 - 10.1016/j.ssi.2007.01.005

DO - 10.1016/j.ssi.2007.01.005

M3 - Article

AN - SCOPUS:33947199735

VL - 178

SP - 355

EP - 358

JO - Solid State Ionics

JF - Solid State Ionics

SN - 0167-2738

IS - 5-6

ER -