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http://dx.doi.org/10.6111/JKCGCT.2011.21.4.175

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

Noh, Tai-Min (School of Materials Science and Engineering, Pusan National University)
Ryu, Ji-Seung (National Core Research Center for Hybrid Materials Solution, Pusan National University)
Kim, Jin-Seong (School of Materials Science and Engineering, Pusan National University)
Jeong, Cheol-Weon (National Core Research Center for Hybrid Materials Solution, Pusan National University)
Lee, Hee-Soo (School of Materials Science and Engineering, Pusan National University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.21, no.4, 2011 , pp. 175-180 More about this Journal
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 $La_{0.8}Sr_{0.2}Mn_{1-x}Cu_xO_3$ ($0{\leq}x{\leq}0.3$) 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 eu content, whereas they were decreased for x = 0.3. For $0{\leq}x{\leq}0.2$, 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 $Cu^{3+}$ ions. For x = 0.3, however, the increase was originated from the formation of oxygen vacancies due 10 the presence of $Cu^{2+}$ and $Mn^{4+}$.
Keywords
LSM; Cu doping; Lattice parameter; TEC; SOFCs;
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