Protonic conduction in acceptor-doped LaP3O9

Koji Amezawa, Yukinori Kitajima, Yoichi Tomii, Naoichi Yamamoto, Marius Widerøe, Truls Norby

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

The electrical conductivity of LaP3O9 doped with 1 mol% of divalent metals (Ca, Sr, and Ba) substituting La has been investigated at p(H2O) = 0.1-5 kPa, p(O2) = 0.01-100 kPa and T = 573-973 K. H/D isotope effects, proton transport number measurements, and independence of conductivity on p(O2) showed that acceptor-doped LaP3O9 exhibits predominantly proton conduction. The conductivity was largely independent of p(H2O) at constant temperature, indicating that the acceptor was charge compensated by protons and exhibited protonic conduction even at low p(H2O). The conductivities depended considerably on the dopant species and increased in the order Ca < Ba < Sr.

Original languageEnglish
Pages (from-to)2867-2870
Number of pages4
JournalSolid State Ionics
Volume176
Issue number39-40
DOIs
Publication statusPublished - 2005 Dec
Externally publishedYes

Keywords

  • Lanthanum phosphate
  • Protonic conduction

ASJC Scopus subject areas

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

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