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Structural analysis and thermal expansion property of Cu doped LSM for SOFCs

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2011, 21(4), pp.175-180
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering

노태민 1 류지승 1 김진성 1 정철원 1 Lee, Hee-Soo 1

1부산대학교

Accredited

ABSTRACT

The doping effect of Cu in the Sr-doped lanthan manganites (LSM) has been investigated in terms of structural analysis and thermal expansion coefficient (TEC). The La0.8Sr0.2Mn1 − xCuxO3 (0 ≤ x ≤ 0.3) were prepared by solid state reaction method and their crystal structure and TEC were measured. A decrease in the lattice parameters and the TEC were observed with increase Cu content, whereas they were decreased for x = 0.3. For 0 ≤ x ≤ 0.2, the decrease of the lattice parameter and the TEC with increase Cu content were attributed to the reduction of ionic radius of Cu ions due to the presence of Cu3+ ions. For x = 0.3, however, the increase was originated from the formation of oxygen vacancies due to the presence of Cu2+ and Mn4+.

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