Raman Spectroscopy of B-site Order-Disorder in CaTiO3 - Based Microwave Ceramics

H. Zheng, G. D. C. Csete de Györgyfalva, R. Quimby, H. Bagshaw, Rick Ubic, I. M. Reaney, J. Yarwood

Research output: Contribution to journalArticlepeer-review

136 Scopus citations

Abstract

x CaTiO 3 –(1− x ) Sr(Mg 1/3 Nb 2/3 )O3 (CTSMN) and y CaTiO 3 –(1− y ) NdAlO 3 (CTNA) were studied by Raman spectroscopy. A sharp Raman band at 825 cm −1 was observed in SrMg 1/3 Nb 2/3 O 3 , consistent with 1:2 long-range ordering of cations on the B-site. The intensity of this band decreased and its width increased with increasing x implying that the degree of order was reduced. A broad Raman band around 800 cm −1 , absent in both pure CaTiO 3 and NdAlO 3 , was found in CTNA solid solutions with the strongest intensity at x =0.5. The position and intensity of this band suggested that its origin was similar in nature to that observed in CTSMN. The occurrence of a band at ~ 800 cm −1 in CTNA suggested a non-random distribution of Ti 4+ and Al 3+ on the B cation sites.

Original languageAmerican English
Pages (from-to)2653-2659
Number of pages7
JournalJournal of the European Ceramic Society
Volume23
Issue number14
DOIs
StatePublished - 2003

Keywords

  • CaTiO3
  • Functional applications; Perovskites
  • Microwave ceramics
  • Spectroscopy
  • X-ray methods
  • CaTiO
  • Functional applications
  • Perovskites

EGS Disciplines

  • Materials Science and Engineering

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