Lowerature sintering and electrical properties of strontium- and magnesium-doped lanthanum gallate with V2O5 additive

Sang Bu Ha, Yoon Ho Cho, Ho Il Ji, Jong Ho Lee, Yun Chan Kang, Jong Heun Lee

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The effects of a V2O5 additive on the lowerature sintering and ionic conductivity of strontium- and magnesium-doped lanthanum gallate (LSGM: La0.8Sr0.2Ga0.8Mg 0.2O2.8) are studied. The LSGM powders prepared by the glycine nitrate method are mixed with 0.5-2 at.% of VO5/2 and then sintered at 1100-1400 °C in air for 4 h. The apparent density and phase purity of the LSGM specimens are increased with increasing sintering temperature and VO5/2 concentration due to the enhanced sintering and mass transfer via the intergranular liquid phase. The 1 at.% VO5/2-doped LSGM specimen sintered at 1300 °C exhibits a high oxide ion conductivity of ∼0.027 S cm-1 at 700 °C over a wide range of oxygen partial pressure (PO2=10-27-1atm), thereby demonstrating its potential as a useful electrolyte for anode-supported solid oxide fuel cells (SOFCs) without the requirement for any buffer layer between the electrolyte and anode.

Original languageEnglish
Pages (from-to)2971-2978
Number of pages8
JournalJournal of Power Sources
Volume196
Issue number6
DOIs
Publication statusPublished - 2011 Mar 15

Keywords

  • Oxide ion conductivity
  • Phase purity
  • Sintering additive
  • Solid oxide fuel cell
  • Strontium- and magnesium-doped lanthanum gallate
  • Vanadium oxide

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Lowerature sintering and electrical properties of strontium- and magnesium-doped lanthanum gallate with V<sub>2</sub>O<sub>5</sub> additive'. Together they form a unique fingerprint.

  • Cite this