(1-x)NdAlO3-xCaTiO3 시스템의 미세구조 관찰
Microstructure Observations in (1-x)NdAlO3-xCaTiO3 System
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초록
NACT 시스템에 대한 X-ray diffractometry, neutron diffraction 및 transmission electron microscopy 연구에서 다음과 같은 결론을 얻을 수 있었다. 1) X-ray에서 관찰 안된 1:1 규칙화는 중성자 회절시험에서는 관찰할 수 있었다. 2) 이러한 규칙화는 전자회절 패턴에서는 1over2
Abstract
Microstructural investigations of (1-x)NdAlO3-xCaTiO3 (NACT) complex perovskite compounds were carried out using X-ray diffractometry, neutron diffraction and transmission electron microscopy. When 0.3 ≤ x≤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.