Liquid‐Phase‐Assisted Sintering of Calcium‐Doped Lanthanum Chromites

Natsuko Sakai, Tatsuya Kawada, Harumi Yokokawa, Masayuki Dokiya, Isao Kojima

Research output: Contribution to journalArticlepeer-review

95 Citations (Scopus)

Abstract

Investigations have been made on the low‐temperature sinterability of calcium‐doped lanthanum chromites which are to be used as interconnectors in solid oxide fuel cells (SOFCs). Nominally chromium deficient lanthanum calcium chromites (La0.7Ca0.3Cr1yO3, y= 0.02) were found to be sinterable to 94% theoretical density at 1573 K in air, whereas no densification was observed for samples with y = 0. The two‐step shrinkage process suggests a liquid phase sintering mechanism with calcium oxychromates playing an important role as the liquid phase. After sintering at 1573 K, calcium‐rich substances remained at grain boundaries.

Original languageEnglish
Pages (from-to)609-616
Number of pages8
JournalJournal of the American Ceramic Society
Volume76
Issue number3
DOIs
Publication statusPublished - 1993 Mar
Externally publishedYes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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