Synthesis and structural characterization of Ce-doped bismuth titanate

Journal Article · Thu Apr 02 00:00:00 EDT 2009 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2008.09.005· OSTI ID:21199737

Pavlovic, Nikolina ^[1]; Srdic, Vladimir V ^[1]

---

1. Department of Materials Engineering, Faculty of Technology, University of Novi Sad (Serbia)

Ce-modified bismuth titanate nanopowders Bi{sub 4-x}Ce{sub x}Ti{sub 3}O{sub 12} (x {<=} 1) have been synthesized using a coprecipitation method. DTA/TG, FTIR, XRD, SEM/EDS and BET methods were used in order to investigate the effect of Ce-substitution on the structure, morphology and sinterability of the obtained powders. The phase structure investigation revealed that after calcinations at 600 deg. C powder without Ce addition exhibited pure bismuth titanate phase; however, powders with Ce (x = 0.25, 0.5 and 0.75) had bismuth titanate pyrochlore phase as the second phase. The strongest effect of Ce addition on the structure was noted for the powder with the highest amount of Ce (x = 1) having a cubic pyrochlore structure. The presence of pure pyrochlore phase was explained by its stabilization due to the incorporation of cerium ions in titanate structure. Ce-modified bismuth titanate ceramic had a density over 95% of theoretical density and the fracture in transgranular manner most probably due to preferable distribution of Ce in boundary region.

• OSTI ID: 21199737
• Journal Information: Materials Research Bulletin, Vol. 44, Issue 4; Other Information: DOI: 10.1016/j.materresbull.2008.09.005; PII: S0025-5408(08)00307-3; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH COMPOUNDS
CALCINATION
CERAMICS
CERIUM IONS
COPRECIPITATION
CRYSTAL STRUCTURE
DIFFERENTIAL THERMAL ANALYSIS
DOPED MATERIALS
FOURIER TRANSFORMATION
FRACTURES
INFRARED SPECTRA
MORPHOLOGY
POWDERS
PYROCHLORE
SCANNING ELECTRON MICROSCOPY
SYNTHESIS
TEMPERATURE RANGE 0400-1000 K
TITANATES
X-RAY DIFFRACTION