Diffuse phase transition in Sr5RTi3Nb7O30 (R=La, Nd and Sm)
作者： M.R Ranga Raju , R.N.P Choudhary
DOI: 10.1016/S0022-3697(02)00417-1
关键词: Conductivity 、 Permittivity 、 Phase transition 、 Ferroelectricity 、 Mineralogy 、 Temperature coefficient 、 Analytical chemistry 、 Chemistry 、 Dielectric 、 Crystallite 、 Electrical resistivity and conductivity
摘要: Abstract Polycrystalline samples of Sr 5 RTi 3 Nb 7 O 30 , (R=La, Nd and Sm) compounds were prepared by a high-temperature solid-state reaction technique. The formation structure the checked preliminary X-ray studies. Detailed dielectric electrical properties as function frequency (1–100 kHz) temperature (150–650 K) studied. dependence constant suggests that undergo ferro–paraelectric phase transition diffuse type. Measurements conductivity suggest have negative coefficient above 373 K.
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