Relaxor behavior of K0.5La0.5Bi2Nb2O9 ceramics
Data(s) |
2006
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Resumo |
K0.5La0.5Bi2Nb2O9, a relaxor, was synthesized and the structural studies confirmed it to be an n = 2 member of the Aurivillius oxides. The ½{h00} and ½{hk0} types of superlattice reflections in the electron diffraction patterns reflected the presence of ordered polar regions. A broad dielectric peak with frequency dependent dielectric maximum temperature was observed. The dielectric relaxation obeyed the Vogel-Fulcher relation wherein Ea = 0.04 eV, Tf = 428 K,and ωo = 1010 Hz. The diffuseness parameter γ = 2.003 established the relaxor nature and it was attributed to the A-site cationic disorder. The piezoelectric d31 coefficient was 0.5 pC/N at 300 K and 2 pC/N at 480 K. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/43010/1/Relaxor_behavior.pdf Karthik, C and Ravishankar, N and Varma, KBR and Maglione, Mario and Vondermuhll, R and Etourneau, J (2006) Relaxor behavior of K0.5La0.5Bi2Nb2O9 ceramics. In: Applied Physics Letters, 89 (4). 042905-042905. |
Publicador |
American Institute of Physics |
Relação |
http://apl.aip.org/resource/1/applab/v89/i4/p042905_s1 http://eprints.iisc.ernet.in/43010/ |
Palavras-Chave | #Materials Research Centre |
Tipo |
Journal Article PeerReviewed |