| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10624332 | Ceramics International | 2016 | 6 Pages |
Abstract
KSr2Nb5O15 and K1.2Sr1.6Ln0.2Nb5O15 (Ln=La, Pr, and Nd) were synthesized by the Pechini method and calcined at 1373Â K for 10Â h under air atmosphere. Rietveld refinements indicated the presence of structural defects in both KSN and KSN-Ln, especially distortions in O-Nb-O and Nb-O-Nb bonds. Modifications in bond distances of [NbO6] clusters were also confirmed by Raman spectroscopy. Ultraviolet-visible absorption spectra and photoluminescence profiles were influenced by lanthanide atoms in the band structure of modified KSN materials, creating new defects and intermediary energy levels within the band gap.
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Authors
A.R.F. Lima, J.C. Sczancoski, M. Siu Li, E. Longo, E.R. Camargo,