TY - JOUR
T1 - Microstructure characterization of the (1-x)La2/3TiO3·xLaAlO3 system
AU - Lee, Hwack Joo
AU - Park, Hyun Min
AU - Cho, Yang Koo
AU - Nahm, Sahn
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2003/8
Y1 - 2003/8
N2 - Microstructural characterizations on the (1-x)La2/3-TiO3·xLaAlO3 (LTLA) system were conducted using transmission mission electron microscopy. The presence of La2Ti2O7 and La4Ti9O24 phases in pure La2/3TiO3 is confirmed by the electron diffraction pattern. When x = 0.1, the ordering due to the A-site vacancies could be confirmed by the presence of antiphase boundaries (APBs) and 1/2(100) superlattice reflection. As x increases, the ordering decreases and finally disappears when x = 0.6. The tilting of oxygen octahedra could be demonstrated by the presence of the ferroelastic domains in the matrix and 1/2(111) and 1/2(110) superlattice reflections in selected area electron diffraction patterns. In pure LaAlO3, only the antiphase tilting of oxygen octahedra is present due to the presence of 1/2(111) superlattice reflection. In the LTLA system of x = 0.1, both the antiphase and in-phase tiltings of the oxygen octahedra are involved; however, in the range of x from 0.3 to 0.9, the antiphase tilting of oxygen octahedra has appeared. The growth of the ferroelastic domains is influenced by the APBs in the matrix.
AB - Microstructural characterizations on the (1-x)La2/3-TiO3·xLaAlO3 (LTLA) system were conducted using transmission mission electron microscopy. The presence of La2Ti2O7 and La4Ti9O24 phases in pure La2/3TiO3 is confirmed by the electron diffraction pattern. When x = 0.1, the ordering due to the A-site vacancies could be confirmed by the presence of antiphase boundaries (APBs) and 1/2(100) superlattice reflection. As x increases, the ordering decreases and finally disappears when x = 0.6. The tilting of oxygen octahedra could be demonstrated by the presence of the ferroelastic domains in the matrix and 1/2(111) and 1/2(110) superlattice reflections in selected area electron diffraction patterns. In pure LaAlO3, only the antiphase tilting of oxygen octahedra is present due to the presence of 1/2(111) superlattice reflection. In the LTLA system of x = 0.1, both the antiphase and in-phase tiltings of the oxygen octahedra are involved; however, in the range of x from 0.3 to 0.9, the antiphase tilting of oxygen octahedra has appeared. The growth of the ferroelastic domains is influenced by the APBs in the matrix.
UR - http://www.scopus.com/inward/record.url?scp=0041428171&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0041428171&partnerID=8YFLogxK
U2 - 10.1111/j.1151-2916.2003.tb03482.x
DO - 10.1111/j.1151-2916.2003.tb03482.x
M3 - Article
AN - SCOPUS:0041428171
VL - 86
SP - 1395
EP - 1400
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
SN - 0002-7820
IS - 8
ER -