한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제51권3호
  • /
  • Pages.218-223
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  • 2014
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  • 1229-7801(pISSN)
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  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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(001) Pb(Mg1/3Nb2/3)O3-x%PbTiO3 단결정의 도메인 구조 및 상전이

Domain Structure and Phase Transformation of (001) Pb(Mg1/3Nb2/3)O3-x%PbTiO3 Single Crystals

  • Lee, Eun-Gu (Department of Materials Engineering, Chosun University)
  • 투고 : 2014.04.15
  • 심사 : 2014.05.15
  • 발행 : 2014.05.31
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초록

The domain structures, dielectric properties, and phase transformation of (001)-oriented $Pb(Mg_{1/3}Nb_{2/3})O_3-x%PbTiO_3$ (PMN-x%PT) crystals for x=20, 30, 35, and 40 mole% have been investigated. PMN-20%PT consists of polar nano-domains (PND) which do not self-assemble into macro-domain plates. PMN-30%PT consists of PNDs which begin to self-assemble into colonies along preferred {110} planes. PMN-35PT consists of miniature polar domains on the nm scale. PMN-40%PT consists of {001} oriented lamella domains on the mm scale that have internal nano-scale heterogeneities. The dielectric properties of poled (001) PMN-x%PT single crystals have been measured for orientations both parallel and perpendicular to the [001] poling direction. The results of the temperature dependence of the dielectric constant and mesh scans for the 30%PT sample demonstrate that the initial monoclinic phase changes to single domain tetragonal phase and to cubic phase with increasing temperature.

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참고문헌

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