1. Crossover of Ba(Ti,Y)O3 Solid Solutions to Ba3Ti2YO8.5–BaTiO3 Composites and their Dielectric Properties.
- Author
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Jing Zhi, Zhi Yu, and Chen Ang
- Subjects
CERAMICS ,THIN films ,DIELECTRIC films ,SOLID state electronics ,THIN films in electrical insulation ,DIELECTRICS ,ELECTRICAL engineering materials - Abstract
Ceramic samples with the nominal composition (1− x) BaTiO
3 + x Ba3 Ti2 YO8.5 ( x=0−0.535) were prepared by the mixed oxide method. X-ray diffraction (XRD) analysis shows that the materials are of single phase with a cubic symmetry as x≤0.16. The compositions of the solid solutions ( x≤0.16) can be expressed equivalently as Ba(Ti1− y Yy )O3−δ ( y≤0.122, y= x/(1+2 x)). For x>0.16, the materials are diphasic composites consisting of Ba(Ti1− y Yy )O3 ( y=0.122) and Ba3 Ti2 YO8.5 . The microstructure observation by scanning electron microscopy supports the XRD result. The dielectric behavior and phase transitions of the solid solutions ( x≤0.16) vary with different Y concentrations. The dielectric constant of the composites ( x>0.16) follows approximately the Lichteneker relation in a wide temperature range. [ABSTRACT FROM AUTHOR]- Published
- 2005
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