Applied Microscopy

  • 제32권1호
  • /
  • Pages.9-15
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  • 2002
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  • 2287-5123(pISSN)
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  • 2287-4445(eISSN)
한국현미경학회 (Korean Society of Microscopy)
권호 표지

$(1-x)NdAlO_3-xCaTiO_3$ 시스템의 미세구조 관찰

Microstructure Observations in $(1-x)NdAlO_3-xCaTiO_3$ System

  • 이확주 (한국표준과학연구원 물질량 표준부) ;
  • 류현 (한국표준과학연구원 물질량 표준부) ;
  • 박현민 (한국표준과학연구원 물질량 표준부) ;
  • 조양구 (한국표준과학연구원 물질량 표준부) ;
  • 김재천 (한국표준과학연구원 물질량 표준부) ;
  • 남산 (고려대학교 공과대학 재료공학부)
  • Lee, Hwack-Joo (New Materials Evaluation Center, Korea Research Institute of Standards and Science) ;
  • Ryu, Hyun (New Materials Evaluation Center, Korea Research Institute of Standards and Science) ;
  • Park, Hyun-Min (New Materials Evaluation Center, Korea Research Institute of Standards and Science) ;
  • Cho, Yang-Koo (New Materials Evaluation Center, Korea Research Institute of Standards and Science) ;
  • Kim, Jae-Chun (New Materials Evaluation Center, Korea Research Institute of Standards and Science) ;
  • Nahm, Sahn (Division of Materials and Metallurgical Engineering, Korea University)
  • 발행 : 2002.03.01
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초록

NACT 복합 페브로스카이트 화합물에 대한 미세조직 관찰을 X-ray diffractometer, neutron diffraction 그리고 TEM으로 관찰하였다. $0.3{\leq}x{\leq}0.9$일 때 NACT는 양이온의 1 : 1 chemical ordering 뿐만 아니라 산소팔면체의 antiphase와 inphase tilting을 보여준다. 따라서 APB와 ferroelastic domain 경계가 미세구조에 나타나 있다. X값이 0.3보다 작아지면, chemical ordering은 나타나지 않고 단지 산소팔면체의 antiphase tilting 만이 나타난다. 미세구조에는 tangled dislocation과 2차상이 또한 발견되었다.

Microstructural investigations of $(1-x)NdAlO_3-xCaTiO_3$ (NACT) complex perovskite compounds were carried out using X-ray diffractometry, neutron diffraction and transmission electron microscopy. When $0.3{\leq}x{\leq}0.9$, NACT had not only the 1 : 1 chemical ordering of cations but also the antiphase and inphase tilting of oxygen octahedron and the antiparallel shift of cations. Both the antiphase boundaries and the ferroelastic domains were present in the microstructure. The long and straight ferroelastic domains became degenerate as x decreases. When x was smaller than 0.3, the chemical ordering was absent and the antiphase tilting of oxygen octahedron was observed. The defects like tangled dislocations and the second phase were also found in the microstructure.

키워드

참고문헌

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