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- Title
High Dielectric Composition in the System Sn-Modified (1−x)BaTiO<sub>3</sub>–xBa(Cu<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>, x=0.025 for Multilayer Ceramic Capacitors.
- Authors
Maurya, Deepam; Ahn, Cheol-Woo; Zhang, Shujun; Priya, Shashank
- Abstract
We report the synthesis and characterization of BaTiO3 (BT)-based high dielectric compositions that are promising for Y5V-type multilayer ceramic capacitors. A solid solution with a nominal composition (1− x)BaTiO3– xBa(Cu1/3Nb2/3)O3 (BCN) ( x=0, 0.025) was synthesized by conventional mixed oxide route, followed by compositional modification with varying concentration of Sn, as given by the formulation: 0.975 BaTi1− ySn yO3–0.025 Ba(Cu1/3Nb2/3)O3 ( y=0.05, 0.06, 0.075, 0.1). Room-temperature (RT) X-ray diffraction patterns showed a decrease in the tetragonality of BT after modifying with BCN (BTBCN). Modifications with Sn lead to a further decrement in tetragonality and the RT structure became cubic at 6.0 at.% doping level. The decrement in tetragonality was accompanied by lowering of Curie temperature ( Tc). BTBCN doped with 6 and 7.5 at.% Sn were found to exhibit diffuse phase transition accompanied by a high dielectric constant ≥7000, a low loss tangent ≤1% and a grain size in the submicrometer regime (≤1 μm).
- Subjects
CERAMICS; DIELECTRIC devices; CAPACITORS; BARIUM; SOLID solutions; OXIDES; TITANIUM dioxide; TITANIUM compounds; X-ray diffraction
- Publication
Journal of the American Ceramic Society, 2010, Vol 93, Issue 5, p1225
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2009.03523.x