Novel Raman spectroscopy of a strong high-k diffuse phase transition (Ba1−xSmx)(Ti0.95−x/4Ce0.05)O3 ceramics

Novel Raman spectra were discovered in (Ba1−xSmx)(Ti0.95−x/4Ce0.05)O3 (0.03≤x≤0.10) ceramics and investigated in relation to the fluorescent effect of Sm3+ ions. Special interest was paid to analyze the dielectric response and defect chemistry associated with the structural evolution by X-ray diffra...

Full description

Saved in:
Bibliographic Details
Published in:Ceramics international 2016-05, Vol.42 (7), p.8815-8821
Main Authors: Han, Dan-Dan, Liu, Qiao-li, Wang, Yan-Dong, Wang, Chang-Hao, Lu, Da-Yong
Format: Article
Language:English
Subjects:
B. Defects
C. Dielectric properties
D. BaTiO3 and titanates
Powders: solid state reaction and sintering
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Novel Raman spectra were discovered in (Ba1−xSmx)(Ti0.95−x/4Ce0.05)O3 (0.03≤x≤0.10) ceramics and investigated in relation to the fluorescent effect of Sm3+ ions. Special interest was paid to analyze the dielectric response and defect chemistry associated with the structural evolution by X-ray diffraction (XRD), scanning electron microscopy (SEM), electron paramagnetic resonance (EPR), Raman spectroscopy (RS), and dielectric measurements. Complete solid solutions, known as BS5TC5 and BS6TC5 for (Ba1−xSmx)(Ti0.95−x/4Ce0.05)O3 ceramics were found to form at x=0.05 and 0.06 (approximately) and exhibit a cubic structure and a non-uniform microstructure. BS6TC5 exhibited a strong high-k diffuse phase transition (DPT) behavior (ϵm′=9300, TC=78°C), a lower dielectric loss (tanδ
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2016.02.125