Synthesis and Dielectric Properties of Ba(Ti,Y)O3 Solid Solutions to Ba3Ti2YO8.5-BaTiO3 Composites

Min Huang; Yun Wu Wang

doi:10.4028/www.scientific.net/AMR.194-196.109

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Synthesis and Dielectric Properties of Ba(Ti,Y)O₃ Solid Solutions to Ba₃Ti₂YO_8.5-BaTiO₃ Composites

Abstract:

Ceramic samples with the nominal composition (1-x) BaTiO₃ + x Ba₃Ti₂YO_8.5 (x = 0 - 0.4) were prepared by the solid-state reaction method. The X-ray diffraction (XRD) analysis and the lattice parameters determination indicate that the samples with x≤ 0.16 exhibit a single phase cubic perovskite structure. When x > 0.16, the system is of biphasic composites, which consist of Ba(Ti_0.911Y_0.089)O₃ and Ba₃Ti₂YO_8.5. The microstructure observation by Scanning Electron Microscopy (SEM) supports the XRD result. For the biphasic composites, the dielectric constant follows the Lichtenecker relation in a wide temperature range.