caa a22 4500 463228642 CHVBK 20180405153235.0 cr unu---uuuuu 170326e20070901xx s 000 0 eng 10.1007/s10853-007-1555-4 doi (NATIONALLICENCE)springer-10.1007/s10853-007-1555-4 Frequency and temperature dependence of electrical properties of barium and gadolinium substituted SrBi2Nb2O9 ceramics [Elektronische Daten] [Konapala Sambasiva Rao, Dasari Madhava Prasad, Prayaga Murali Krishna, B. Hima Bindu, K. Suneetha] Barium strontium gadolinium bismuth niobate (Ba0.1Sr0.81Gd0.06Bi2Nb2O9, BSGBN) ceramics were prepared by using the conventional solid-state reaction method. The dielectric permittivity, modulus and impedance spectroscopy studies on BSGBN were investigated in the frequency range, 45Hz-5MHz and in the temperature range from room temperature (RT) to 570°C. The dielectric anomaly with a broad peak was observed at 470°C. Simultaneous substitution of Ba2+ and Gd3+ increases the transition temperature of SrBi2Nb2O9 (SBN) from 392 to 470°C. XRD studies in BSGBN revealed an orthorhombic structure with lattice parameters a=5.4959Å, b/a=1.000, c=25.0954Å. Impedance and modulus plots were used as tools to analyse the sample behaviour as a function of frequency. Cole-Cole plots showed a non-Debye relaxation. Also, dc and ac conductivity measurements were performed on BSGBN. The electric impedance which describes the dielectric relaxation behaviour is fitted to the Kohlrausch exponential function. Near the phase transition temperature, a stretched exponential parameter β indicating the degree of distribution of the relaxation time has a small value. Springer Science+Business Media, LLC, 2007 Sambasiva Rao Konapala Centre for Piezoelectric Transducer Materials, Department of Physics, Andhra University, 530 003, Visakhapatnam, India aut Madhava Prasad Dasari Centre for Piezoelectric Transducer Materials, Department of Physics, Andhra University, 530 003, Visakhapatnam, India aut Murali Krishna Prayaga Centre for Piezoelectric Transducer Materials, Department of Physics, Andhra University, 530 003, Visakhapatnam, India aut Hima Bindu B. Centre for Piezoelectric Transducer Materials, Department of Physics, Andhra University, 530 003, Visakhapatnam, India aut Suneetha K. Centre for Piezoelectric Transducer Materials, Department of Physics, Andhra University, 530 003, Visakhapatnam, India aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/17(2007-09-01), 7363-7374 0022-2461 42:17<7363 2007 42 10853 https://doi.org/10.1007/s10853-007-1555-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1555-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sambasiva Rao Konapala Centre for Piezoelectric Transducer Materials, Department of Physics, Andhra University, 530 003, Visakhapatnam, India aut NATIONALLICENCE 700 1- Madhava Prasad Dasari Centre for Piezoelectric Transducer Materials, Department of Physics, Andhra University, 530 003, Visakhapatnam, India aut NATIONALLICENCE 700 1- Murali Krishna Prayaga Centre for Piezoelectric Transducer Materials, Department of Physics, Andhra University, 530 003, Visakhapatnam, India aut NATIONALLICENCE 700 1- Hima Bindu B. Centre for Piezoelectric Transducer Materials, Department of Physics, Andhra University, 530 003, Visakhapatnam, India aut NATIONALLICENCE 700 1- Suneetha K. Centre for Piezoelectric Transducer Materials, Department of Physics, Andhra University, 530 003, Visakhapatnam, India aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/17(2007-09-01), 7363-7374 0022-2461 42:17<7363 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer