caa a22 4500 463228359 CHVBK 20180405153234.0 cr unu---uuuuu 170326e20070901xx s 000 0 eng 10.1007/s10853-007-1835-z doi (NATIONALLICENCE)springer-10.1007/s10853-007-1835-z Effect of La substitution on structural and electrical properties of Ba(Fe2/3W1/3)O3 nanoceramics [Elektronische Daten] [R. Choudhary, Dillip Pradhan, C. Tirado, G. Bonilla, R. Katiyar] The nanocrystalline fine powders (∼80nm) 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 tanδ) exhibit that these parameters are strongly dependent on frequency, temperature and La composition. The La-substitution increases the dielectric constant and decreases the tanδ 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. Springer Science+Business Media, LLC, 2007 Choudhary R. Department of Physics, University of Puerto Rico, 00931, San Juan, PR, USA aut Pradhan Dillip Department of Physics, University of Puerto Rico, 00931, San Juan, PR, USA aut Tirado C. Department of Physics, University of Puerto Rico, 00931, San Juan, PR, USA aut Bonilla G. Department of Physics, University of Puerto Rico, 00931, San Juan, PR, USA aut Katiyar R. Department of Physics, University of Puerto Rico, 00931, San Juan, PR, USA aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/17(2007-09-01), 7423-7432 0022-2461 42:17<7423 2007 42 10853 https://doi.org/10.1007/s10853-007-1835-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1835-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Choudhary R. Department of Physics, University of Puerto Rico, 00931, San Juan, PR, USA aut NATIONALLICENCE 700 1- Pradhan Dillip Department of Physics, University of Puerto Rico, 00931, San Juan, PR, USA aut NATIONALLICENCE 700 1- Tirado C. Department of Physics, University of Puerto Rico, 00931, San Juan, PR, USA aut NATIONALLICENCE 700 1- Bonilla G. Department of Physics, University of Puerto Rico, 00931, San Juan, PR, USA aut NATIONALLICENCE 700 1- Katiyar R. Department of Physics, University of Puerto Rico, 00931, San Juan, PR, USA aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/17(2007-09-01), 7423-7432 0022-2461 42:17<7423 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer