Degradation of electrical conductivity in lanthanum silicate oxyapatite

T. Ishiyama, H. Maruyama, H. Kishimoto, K. D. Bagarinao, T. Horita, K. Yamaji, A. Yamazaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Degradation of electrical conductivity in lanthanum silicate oxyapatite (La9.33+xSi6O26+1.5x) was observed at 600∼1000°C. Small particles were detected on the surface of pellets after electrical conductivity measurements for 100∼201 h. These particles were identified as La2SiO5 phase using micro-Raman spectroscopy. Lanthanum content in the oxyapatite phase is strongly related to its conductivity, because the excess oxygen is incorporated by charge compensation according to excess lanthanum composition. This study suggests that the decrease in electrical conductivity may be attributed to reduction in electrical charge carriers as a result of the phase degradation of La2SiO5 phase from oxyapatite phase.

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 14, SOFC 2015
EditorsS. C. Singhal, K. Eguchi
PublisherElectrochemical Society Inc.
Pages523-527
Number of pages5
Edition1
ISBN (Electronic)9781623322717
DOIs
Publication statusPublished - 2015
Event14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage - Glasgow, United Kingdom
Duration: 2015 Jul 262015 Jul 31

Publication series

NameECS Transactions
Number1
Volume68
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Other

Other14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage
Country/TerritoryUnited Kingdom
CityGlasgow
Period15/7/2615/7/31

ASJC Scopus subject areas

  • General Engineering

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