Back to Search
Start Over
Effect of La substitution on structural and electrical properties of Ba(Fe2/3W1/3)O3 nanoceramics.
- Source :
-
Journal of Materials Science . Sep2007, Vol. 42 Issue 17, p7423-7432. 10p. 1 Black and White Photograph, 2 Charts, 9 Graphs. - Publication Year :
- 2007
-
Abstract
- The nanocrystalline fine powders (∼80 nm) of (Ba1− x La x )(Fe2/3W1/3)1− x/4O3, (BLFW) ( x = 0.0, 0.05, 0.10 and 0.15) were synthesized with a combined mechanical activation and conventional high-temperature solid-state reaction methods. Preliminary X-ray structural analysis of pellet samples (prepared from fine powders) showed formation of a single-phase tetragonal system. Detailed studies of dielectric properties (εr and tan δ) exhibit that these parameters are strongly dependent on frequency, temperature and La composition. The La-substitution increases the dielectric constant and decreases the tan δ up to 10% substitutions of La at the Ba-site, and then reversed the variation, and hence this composition is considered as a critical composition. This observation was found valid for structure, microstructures, dielectric constant, electrical conductivity, J– E characteristics and impedance parameters also. Like in other perovskites (PZT, BZT), La substitution plays an important role in tailoring the properties of Ba(Fe2/3W1/3)O3 ceramics. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00222461
- Volume :
- 42
- Issue :
- 17
- Database :
- Academic Search Index
- Journal :
- Journal of Materials Science
- Publication Type :
- Academic Journal
- Accession number :
- 25604427
- Full Text :
- https://doi.org/10.1007/s10853-007-1835-z