caa a22 4500 445827696 CHVBK 20180317145304.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10854-011-0358-1 doi (NATIONALLICENCE)springer-10.1007/s10854-011-0358-1 Dielectric and impedance spectroscopy study of Ba0.8Bi2.133Nb1.6Ta0.4O9 ferroelectric ceramics, prepared by chemical route [Elektronische Daten] [Prasanta Dhak, Debasis Dhak, Manasmita Das, Panchanan Pramanik] Nanocrystalline ceramic powder of Ba0.8Bi2.133Nb1.6Ta0.4O9 was synthesized by chemical precursor decomposition method. The single-phase formation of the compound was confirmed using an X-ray diffraction technique and was found to be a tetragonal phase at room temperature. Average crystallite size and particle size were found to be 41 and 48.5nm, which were analyzed through XRD and TEM respectively. The dielectric constant and tangent loss were measured in the frequency range 1kHz-1MHz after sintering the sample at 900°C for 4h. The polarization behavior was studied at an applied voltage of 6.2kV/cm. Electrical properties of the material were investigated using complex impedance spectroscopy (CIS) technique, which revealed the presence of both grain and grain-boundary effects in the materials, which is also evidenced from the scanning electron microscope image. Grain conductivity indicated Arrhenius-type thermally activated process. AC conductivity spectrum obeys Jonscher's universal power law. The electric modulus analysis suggests the possibility of hopping mechanism for electrical processes in the system with a non-debye type relaxation, which is supported by the impedance data. Springer Science+Business Media, LLC, 2011 Dhak Prasanta Department of Chemistry, Indian Institute of Technology Kharagpur, 721302, Kharagpur, India aut Dhak Debasis Department of Chemistry, Serampore College, 712201, Serampore, Hoogly, India aut Das Manasmita Center of Pharmaceutical Nanotechnology, Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Sector-67, SAS Nagar, 160062, Mohali, India aut Pramanik Panchanan Department of Chemistry, Indian Institute of Technology Kharagpur, 721302, Kharagpur, India aut Journal of Materials Science: Materials in Electronics Springer US; http://www.springer-ny.com 22/12(2011-12-01), 1750-1760 0957-4522 22:12<1750 2011 22 10854 https://doi.org/10.1007/s10854-011-0358-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10854-011-0358-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dhak Prasanta Department of Chemistry, Indian Institute of Technology Kharagpur, 721302, Kharagpur, India aut NATIONALLICENCE 700 1- Dhak Debasis Department of Chemistry, Serampore College, 712201, Serampore, Hoogly, India aut NATIONALLICENCE 700 1- Das Manasmita Center of Pharmaceutical Nanotechnology, Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Sector-67, SAS Nagar, 160062, Mohali, India aut NATIONALLICENCE 700 1- Pramanik Panchanan Department of Chemistry, Indian Institute of Technology Kharagpur, 721302, Kharagpur, India aut NATIONALLICENCE 773 0- Journal of Materials Science: Materials in Electronics Springer US; http://www.springer-ny.com 22/12(2011-12-01), 1750-1760 0957-4522 22:12<1750 2011 22 10854 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer