Electrical properties of atmospheric plasma-sprayed La 10(SiO 4) 6O 3 electrolyte coatings

Wei Gao, Wen Ya Li, Han Lin Liao, Christian Coddet

Research output: Contribution to journalReview articlepeer-review

7 Scopus citations

Abstract

In this present work, La 10(SiO 4) 6O 3 as a promising electrolyte candidate for intermediate temperature solid oxide fuel cells (IT-SOFCs) has been synthesized and its electrical property was investigated as a function of temperature. In order to improve the density and oxide ion conductivity of La 10(SiO 4) 6O 3, the feedstock powder was prepared by sintering the oxide mixture powders at proper sintering temperatures and times. The hexagonal apatite-type ceramic coatings with a typical composition of La 10(SiO 4) 6O 3 were deposited by atmospheric plasma spraying (APS) with different hydrogen flow rates. With increasing hydrogen flow rate oxide ion conductivity successively decreases. The highest ionic conductivity of the dense composite electrolyte coatings reaches a value of 2.4 mS/cm at 900 °C in air, which is comparable to other apatite-type lanthanum silicate (ATLS) conductors.

Original languageEnglish
Pages (from-to)888-891
Number of pages4
JournalJournal of Thermal Spray Technology
Volume20
Issue number4
DOIs
StatePublished - Jun 2011

Keywords

  • apatite-type lanthanum silicate coating
  • atmospheric plasma spraying
  • intermediate temperature solid oxide fuel cells
  • oxide ion conductivity

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