Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 1395-1400 |
| Number of pages | 6 |
| Journal | Journal of the American Ceramic Society |
| Volume | 86 |
| Issue number | 8 |
| Publication status | Published - 2003 Aug 1 |
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ASJC Scopus subject areas
- Ceramics and Composites
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Microstructure characterization of the (1-x)La2/3TiO3·xLaAlO3 system. / Lee, Hwack Joo; Park, Hyun Min; Cho, Yang Koo; Nahm, Sahn.
In: Journal of the American Ceramic Society, Vol. 86, No. 8, 01.08.2003, p. 1395-1400.Research output: Contribution to journal › Article
}
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
PY - 2003/8/1
Y1 - 2003/8/1
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.
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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 -