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Characterization and Physical Properties of Ba0.9Sb0.1TiO3 Solid Solution
Applied Science and Convergence Technology 2019;28:30-34
Published online March 31, 2019;
© 2019 The Korean Vacuum Society.

Yeon Jung Kim

Center for Innovative Engineering Education, Dankook University, Yongin 16890, Republic of Korea
Correspondence to: *
Received March 12, 2019; Accepted March 27, 2019.

BaTiO3 is known to be an environmentally friendly electronic material with a phase transition temperature that can be controlled through the substitution of an appropriate additive. Physical changes of grain growth in Ba0.9Sb0.1TiO3 were analyzed by adding a small amount of antimony to pure BaTiO3. The Ba0.9Sb0.1TiO3 solid solution with antimony substitution was prepared under various calcination and sintering conditions. The optimal conditions for sintering were confirmed and the grain growth process was clearly understood. As a result, the relationship between the dielectric properties and the polycrystalline structure of Ba0.9Sb0.1TiO3 substituted with antimony was confirmed. The maximum dielectric constant of the Ba0.9Sb0.1TiO3 solid solution was found to exceed about 5500 and the dielectric constant at room temperature reached nearly 4000. The transition temperature of Ba0.9Sb0.1TiO3 was shifted closer to room temperature than that of pure BaTiO3. Unlike the phase transition behavior of pure BaTiO3, the dielectric constant curve, which is a function of temperature for all samples, showed a very gradual change.

Keywords : Ba0.9Sb0.1TiO3 (BST), Grain growth, Phase transition, Modified Curie-weiss law