Effect of cerium addition on the microstructure, electrical and relaxor behavior of Sr0.5Ba0.5Nb2O6 ceramics
作者： T.S. Velayutham , N.I.F. Salim , W.C. Gan , W.H. Abd. Majid
DOI: 10.1016/J.JALLCOM.2015.12.248
关键词: Dielectric spectroscopy 、 Ceramic 、 Materials science 、 Dopant 、 Analytical chemistry 、 Tetragonal crystal system 、 Cerium 、 Dielectric 、 Mineralogy 、 Ferroelectricity 、 Microstructure
摘要: Abstract Sr 0.5 Ba Nb 2 O 6 (SBN50) ceramic doped with different concentrations of Cerium (Ce) according to the stoichiometry formulation 0.5-3 y /2 Ce (Ce-SBN) = 0, 0.01, 0.02, 0.03, 0.04 and 0.05 was prepared using conventional solid state reaction method. The morphology, structure, electrical properties samples were studied field emission scanning electron microscope (FESEM), X-ray diffraction (XRD), ferroelectric dielectric spectroscopy, respectively. FESEM images reveal a strong influence cerium on SBN microstructure. patterns show that all compositions exhibit tetragonal tungsten bronze structure. As dopant concentration, increased, both unit cell volume axial ratio c/a decreased gradually. In addition, incorporation lowers phase transition temperature, T m . result, practical parameters are sufficiently i.e. constant remnant polarization. SBN50 3% sample is most attractive for applications due its high polarization, P r = 58.6 μC/cm constant, e ’ ≈ 8000 (10 kHz) at room
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