Effect of Li+ addition on crystal structure and electrical conduction of highly defective La1/3NbO3 perovskite

Kai Yun Yang, Kuan-Zong Fung

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The Li+ solubility, crystal structure and electrical properties of the Li3xLa1/3-xNbO3 solid solution with A-site deficient perovskite structure were examined using X-ray diffractometer (XRD), scanning electron microscope (SEM), and alternating current (AC) impedance technique. XRD and SEM results showed that the limit of the Li+ solubility in this solid solution was found to be within 25 at%. Over this limit, the second phase of LiNbO3 was observed. With increasing the Li+ content (3x), the crystal structure of La1/3NbO3 changed from orthorhombic via tetragonal to cubic symmetry. The AC impedance analysis showed that the characteristic of Li+ conduction was present in the Li3xLa1/3-xNbO3 solid solution and there was a maximum conductivity of 7.21×10-5 S cm-1 at 3x=0.05.

Original languageEnglish
Pages (from-to)393-399
Number of pages7
JournalJournal of Physics and Chemistry of Solids
Volume69
Issue number2-3
DOIs
Publication statusPublished - 2008 Feb 1

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Perovskite
Solid solutions
solid solutions
Crystal structure
Diffractometers
diffractometers
conduction
crystal structure
alternating current
Electron microscopes
solubility
Solubility
electron microscopes
impedance
Scanning
X rays
scanning
Electric properties
x rays
electrical properties

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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title = "Effect of Li+ addition on crystal structure and electrical conduction of highly defective La1/3NbO3 perovskite",
abstract = "The Li+ solubility, crystal structure and electrical properties of the Li3xLa1/3-xNbO3 solid solution with A-site deficient perovskite structure were examined using X-ray diffractometer (XRD), scanning electron microscope (SEM), and alternating current (AC) impedance technique. XRD and SEM results showed that the limit of the Li+ solubility in this solid solution was found to be within 25 at{\%}. Over this limit, the second phase of LiNbO3 was observed. With increasing the Li+ content (3x), the crystal structure of La1/3NbO3 changed from orthorhombic via tetragonal to cubic symmetry. The AC impedance analysis showed that the characteristic of Li+ conduction was present in the Li3xLa1/3-xNbO3 solid solution and there was a maximum conductivity of 7.21×10-5 S cm-1 at 3x=0.05.",
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Effect of Li+ addition on crystal structure and electrical conduction of highly defective La1/3NbO3 perovskite. / Yang, Kai Yun; Fung, Kuan-Zong.

In: Journal of Physics and Chemistry of Solids, Vol. 69, No. 2-3, 01.02.2008, p. 393-399.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Yang, Kai Yun

AU - Fung, Kuan-Zong

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AB - The Li+ solubility, crystal structure and electrical properties of the Li3xLa1/3-xNbO3 solid solution with A-site deficient perovskite structure were examined using X-ray diffractometer (XRD), scanning electron microscope (SEM), and alternating current (AC) impedance technique. XRD and SEM results showed that the limit of the Li+ solubility in this solid solution was found to be within 25 at%. Over this limit, the second phase of LiNbO3 was observed. With increasing the Li+ content (3x), the crystal structure of La1/3NbO3 changed from orthorhombic via tetragonal to cubic symmetry. The AC impedance analysis showed that the characteristic of Li+ conduction was present in the Li3xLa1/3-xNbO3 solid solution and there was a maximum conductivity of 7.21×10-5 S cm-1 at 3x=0.05.

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