Primary particle size effect on phase transition in Ba2In2O5
The primary particle (or crystallite) size effect on the order-disorder phase transition temperature in BaIn2O5 was investigated. Sintered specimens were prepared by solid state synthesis. Structural characterization performed by Raman spectroscopy shows that single-phase brownmillerite structure was obtained at room temperature for all prepared samples. In situ high-temperature X-ray diffraction experiments using Synchrotron radiation and electrical conductivity measurements reveal a decrease in the phase transition temperature with decreasing of the primary particle size. Lattice defects, mainly hydroxyls and nitrates, also influence the phase transition in Ba2In2O5.
Electrical conductivity X-ray diffraction Phase transition Ba2In2O5
J.F.Q.Rey F.F.Ferreira E.N.S.Muccillo
Energy and Nuclear Research Institute-IPEN, PO BOX 11049, S.Paulo, SP, 05422-970, Brazil Brazilian S Brazilian Synchrotron Light Laboratory-LNLS, PO BOX 6192, Campinas, SP, 13083-970, Brazil Energy and Nuclear Research Institute-IPEN, PO BOX 11049, S.Paulo, SP, 05422-970, Brazil
国际会议
The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)
上海
英文
1029-1031
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）