The effect of Dy2O3 addition on crystal structure, grain growth, and dielectric properties in BaTiO3 (BaTiO3에서 Dy2O3 첨가가 결정구조 , 입자성장 및 유전특성에 미치는 영향)

Won-Gi Ahn (안원기); Moonhee Choi (최문희); Minkee Kim (김민기); Kyoung-Seok Moon (문경석)

doi:10.6111/JKCGCT.2022.32.4.136

The effect of Dy2O3 addition on crystal structure, grain growth, and dielectric properties in BaTiO3

Journal of the Korean Crystal Growth and Crystal Technology
Abbr : J. Korean Cryst. Growth Cryst. Technol.
2022, 32(4), pp.136-142
DOI : 10.6111/JKCGCT.2022.32.4.136
Publisher : The Korea Association Of Crystal Growth, Inc.
Research Area : Engineering > Materials Science and Engineering
Received : July 14, 2022
Accepted : July 26, 2022
Published : August 31, 2022

Won-Gi Ahn ¹, Moonhee Choi ², Minkee Kim ³, Kyoung-Seok Moon ⁴

¹경상대학교 나노신소재융합공학과
²한국세라믹기술원
³(주)삼화콘덴서공업 MLCC선행개발팀
⁴경상대학교경상대학교 나노신소재융합공학과

Accredited

ABSTRACT

The crystal structure, grain growth behavior, and dielectric properties of BaTiO3 have been studied with the addition of Dy2O3. The powders were synthesized at ratios of (100-x)BaTiO3-xDy2O3 (mol%, x = 0, 0.5, 1.0, 2.0) by a conventional solid-state synthesis, and the powder compacts were sintered at 1250°C for 2 hours in air. As the amount of added Dy2O3 was increased, the crystal structure of the sintered samples changed from a tetragonal to a pseudo-cubic structure, and the tetragonality decreased. In addition, a secondary phase of Ba12Dy4.67Ti8O35 appeared when Dy2O3 was added. The average grain size after sintering decreased and abnormal grains appeared as the amount of Dy2O3 increased. It can be explained that the grain growth behavior of the Dy2O3 added-BaTiO3 occurs due to the two-dimensional nucleation and growth, and is governed by the interface reaction. Further, the correlation between crystal structure, microstructure, and dielectric properties was discussed.

KEYWORDS

BaTiO3, Perovskite, Crystal structure, Microstructure, Grain growth

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* References for papers published after 2023 are currently being built.

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Journal of the Korean Crystal Growth and Crystal Technology 2023 KCI Impact Factor : 0.19

The effect of Dy2O3 addition on crystal structure, grain growth, and dielectric properties in BaTiO3

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* References for papers published after 2023 are currently being built.

Journal of the Korean Crystal Growth and Crystal Technology 2023 KCI Impact Factor : 0.19

The effect of Dy2O3 addition on crystal structure, grain growth, and dielectric properties in BaTiO3

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KEYWORDS

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