caa a22 4500 445362766 CHVBK 20180317142920.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s10832-011-9650-y doi (NATIONALLICENCE)springer-10.1007/s10832-011-9650-y Influence of substitution on dielectric diffuseness in Ba(1-x)Bi(2+2x/3)Nb2O9 ceramics prepared by chemical precursor decomposition method [Elektronische Daten] [Debasis Dhak, Prasanta Dhak, Panchanan Pramanik] Barium bismuth niobate, Ba(1-x)Bi(2+2x/3)Nb2O9 (BBN with x = 0.0, 0.1, 0.2, 0.3, 0.4) ceramic powders in the nanometer range were prepared by chemical precursor decomposition method (CPD). The single phase layered perovskite was prepared throughout the composition range studied. No intermediate phase was found during heat treatment at and above 600°C. The crystallite size and the particle size, obtained from XRD and TEM respectively, were in the range of 15-30nm. The addition of Bi2O3 substantially improved the sinterability associated with high density (96%) which was otherwise difficult in the case of pure BaBi2Nb2O9 (BBN x = 0.0). The sintering was done at 900°C for 4h. The relative permittivity of BBN ceramics at both room temperature and in the vicinity of the temperature of maximum permittivity (Tm) has increased significantly with increase in bismuth content and loss is also decreased to a certain level of bismuth doping. Tm increased with increase in Bi2O3. The diffuseness (γ) in the phase transition was found to increase from 1.54 to 1.98 with the increase in Ba2+ substitution level from x = 0.0 to x = 0.3. Springer Science+Business Media, LLC, 2011 Ceramics nationallicence Chemical synthesis nationallicence Dielectric properties nationallicence Dhak Debasis Department of Chemistry, Serampore College, 712201, Serampore, Hooghly, India aut Dhak Prasanta Department of Chemistry, Indian Institute of Technology Kharagpur, 721302, Kharagpur, India aut Pramanik Panchanan Department of Chemistry, Indian Institute of Technology Kharagpur, 721302, Kharagpur, India aut Journal of Electroceramics Springer US; http://www.springer-ny.com 27/2(2011-10-01), 56-65 1385-3449 27:2<56 2011 27 10832 https://doi.org/10.1007/s10832-011-9650-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10832-011-9650-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dhak Debasis Department of Chemistry, Serampore College, 712201, Serampore, Hooghly, India aut NATIONALLICENCE 700 1- Dhak Prasanta Department of Chemistry, Indian Institute of Technology Kharagpur, 721302, Kharagpur, India aut NATIONALLICENCE 700 1- Pramanik Panchanan Department of Chemistry, Indian Institute of Technology Kharagpur, 721302, Kharagpur, India aut NATIONALLICENCE 773 0- Journal of Electroceramics Springer US; http://www.springer-ny.com 27/2(2011-10-01), 56-65 1385-3449 27:2<56 2011 27 10832 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer