[Untitled]
In: Journal of Materials Science, Jg. 38 (2003), S. 621-628
Online
unknown
Zugriff:
The crystal structure of (Ba1−x La x )[Mg(1 + x)/3Nb(2−x)/3]O3 (BLMN) ceramics with 0 ≤ x ≤ 1 was investigated using X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). When the La content, x, was above 0.1, the 1:2 ordered hexagonal structure found in Ba(Mg1/3Nb2/3)O3 (BMN) was transformed into the 1:1 ordered cubic structure. The 1:1 ordered cubic structure was maintained up to x = 0.7. When x exceeded 0.7, however, BLMN exhibited a 1:1 ordered monoclinic structure, rather than a 1:1 ordered cubic structure. La(Mg2/3Nb1/3)O3 (LMN) has a 1:1 ordered monoclinic P21/n structure with a = 5.6004 A, b = 5.6414 A, c = 7.9346 A, and β = 89.9819°. The monoclinic LMN has the in-phase and the anti-phase tilt of oxygen octahedra. The anti-parallel shift of A-site cations was also found in LMN.
Titel: |
[Untitled]
|
---|---|
Autor/in / Beteiligte Person: | Jong Hoo Paik ; Hwack Joo Lee ; Nahm, Sahn ; Park, Hyunmin ; Jae Dong Byun ; Young Sik Kim |
Link: | |
Zeitschrift: | Journal of Materials Science, Jg. 38 (2003), S. 621-628 |
Veröffentlichung: | Springer Science and Business Media LLC, 2003 |
Medientyp: | unknown |
ISSN: | 0022-2461 (print) |
DOI: | 10.1023/a:1021822614373 |
Schlagwort: |
|
Sonstiges: |
|