(K0.5Na0.5)NbO3-CaZrO3 계에서 입자모양과 입자성장 거동
Grain Shape and Grain Growth Behavior in the (K0.5Na0.5)NbO3-CaZrO3 System
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
The grain growth behavior in the (1-x)K0.5Na0.5NbO3-xCaZrO3 (KNNCZ-x) system is studied as a function of the amount of CZ and grain shape. The (1-x)K0.5Na0.5NbO3-xCaZrO3 (KNNCZ-x) powders are synthesized using a conventional solid-state reaction method. A single orthorhombic phase is observed at x = 0 – 0.03. However, rhombohedral and orthorhombic phases are observed at x = 0.05. The grain growth behavior changes from abnormal grain growth to the suppression of grain growth as the amount of CaZrO3 (CZ) increases. With increasing CZ content, grains become more faceted, and the step-free energy increases. Therefore, the critical growth driving force increases. The grain size distribution broadens with increasing sintering time in KNNCZ-0.05. As a result, some large grains with a driving force larger than the critical driving force for growth exhibit abnormal grain growth behavior during sintering. Therefore, CZ changes the grain growth behavior and microstructure of KNN. Grain growth at the faceted interface of the KNNCZ system occurs via two-dimensional nucleation and growth.
Abstract
The grain growth behavior in the (1-x)K0.5Na0.5NbO3-xCaZrO3 (KNNCZ-x) system is studied as a function of the amount of CZ and grain shape. The (1-x)K0.5Na0.5NbO3-xCaZrO3 (KNNCZ-x) powders are synthesized using a conventional solid-state reaction method. A single orthorhombic phase is observed at x = 0 – 0.03. However, rhombohedral and orthorhombic phases are observed at x = 0.05. The grain growth behavior changes from abnormal grain growth to the suppression of grain growth as the amount of CaZrO3 (CZ) increases. With increasing CZ content, grains become more faceted, and the step-free energy increases. Therefore, the critical growth driving force increases. The grain size distribution broadens with increasing sintering time in KNNCZ-0.05. As a result, some large grains with a driving force larger than the critical driving force for growth exhibit abnormal grain growth behavior during sintering. Therefore, CZ changes the grain growth behavior and microstructure of KNN. Grain growth at the faceted interface of the KNNCZ system occurs via two-dimensional nucleation and growth.
참고문헌 (24)
- M. März, , 6th Int. Conf. Integr. Power Electron. Syst, pp.1~ (2010)
- R. W. Johnson, , IEEE Trans. Electron. Packag. Manuf, 27, pp.164~ (2004)
- H. Cheng, , Int. J. Appl. Ceram. Technol, 12, pp.17~ (2015)
- Z. Liu, , J. Eur. Ceram. Soc, 37, pp.115~ (2017)
- Z. Liu, , J. Alloys Compd, 817, pp.152798~ (2020)
- H.D. Megaw, , Trans. Faraday Soc, 42, pp.224~ (1946)
- G. Shirane, , Phys. Rev. Lett, 96, pp.581~ (1954)
- E. A. Wood, , Acta Crystallogr, 4, pp.353~ (1951)
- C.-W. Ahn, , J. Mater. Sci, 45, pp.396~ (2010)
- R. Wang, , Appl. Phys. Lett, 95, pp.092905~ (2009)
- G. Haertling, , J. Am. Ceram. Soc, 5, pp.329~ (1967)
- J. Wu, , Chem. Rev, 115, pp.2559~ (2015)
- R. Wang, , Phys. Status Solidi Rapid Res. Lett, 3, pp.142~ (2009)
- R. Wang, , Jpn. J. Appl. Phys, 50, pp.09~ (2011)
- W. Liang, , J. Am. Ceram. Soc, 94, pp.4317~ (2011)
- G. Yao, , J. Am. Ceram. Soc, 94, pp.3856~ (2011)
- T. Hoshina, , Jpn. J. Appl. Phys, 5, pp.0902~ (2018)[DOI]
- V. Buscaglia, , J. Eur. Ceram. Soc, 40, pp.3744~ (2020)
- T. Hoshina, , J. Ceram. Soc. Jpn, 121, pp.156~ (2013)
- S.-J. L. Kang, (2005), Elsevier Butterworth-Heinemann
- Y.-I. Jung, , J. Mater. Res, 24, pp.2949~ (2009)
- M. Hillert, , Acta Metal, 13, pp.227~ (1965)
- 문경석, "Na0.5Bi0.5TiO3-BaTiO3 계에서 입자성장 및 고상단결정성장에 미치는 a2CO3 첨가 효과", 한국분말재료학회지, 25(2), pp.104~108 (2018), 한국분말재료학회[DOI]
- P. Kabakov, , J. Mater. Chem. C, 8, pp.7606~ (2020)