Effects of Heating Rate on the Sintering Behavior and the Dielectric Properties of Ba0.7Sr0.3TiO3 Ceramics Prepared by Boron-Containing Liquid-Phase Sintering |
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Authors: | Sung Min Rhim Heungjin Bak Seokmin Hong Ok Kyung Kim |
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Affiliation: | Department of Physics, Hanyang University, Ansan Kyunggi-do, 425–791, Korea |
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Abstract: | The effects of heating rate on the sintering behavior and the dielectric properties of Ba0.7Sr0.3TiO3 ceramics prepared by boron-containing liquid-phase sintering were investigated. When 0.5 wt% B2O3 was added to Ba0.7Sr0.3TiO3, sintering was achieved at ~1150°C, and the overdoped B2O3 did not form an adequate amount of liquid phase or volatilize; it remained in the samples and formed a secondary phase. A transition broadening was observed as the heating rate increased. As the heating rate increased, the Curie temperature increased and the maximum dielectric constant ( k max) at the Curie temperature decreased. This result is attributable to a decrease in the diffuseness parameter (δ) and the tetragonality ( c / a ). |
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Keywords: | heating sintering dielectric properties |
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