Crystal structure of (Ba<subscript>1-x</subscript>Lax) [Mg<subscript>(1 + x)/3</subscript>Nb<subscript>(2-x)/3</subscript>]O<subscript>3</subscript> ceramics.
In: Journal of Materials Science, Jg. 38 (2003-02-01), Heft 3, S. 621-628
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Zugriff:
The crystal structure of (Ba 1-x La x )[Mg (1+x)/3 ]O 3 (BLMN) ceramics with 0 ≤ × ≤ 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(Mg ⅓ Nb 2/3 )O 3 (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(Mg 2/3 Nb ⅓ )O 3 (LMN) has a 1:1 ordered monoclinic P2 1 /n structure with a=5.6004 Å, b=.6414 Å, c=7.9346 Å,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. [ABSTRACT FROM AUTHOR]
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Titel: |
Crystal structure of (Ba<subscript>1-x</subscript>Lax) [Mg<subscript>(1 + x)/3</subscript>Nb<subscript>(2-x)/3</subscript>]O<subscript>3</subscript> ceramics.
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Autor/in / Beteiligte Person: | Jong Hoo Paik ; Nahm, Sahn ; Young Sik Kim ; Hyun Min Park ; Hwack Joo Lee ; Jae Dong Byun |
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Zeitschrift: | Journal of Materials Science, Jg. 38 (2003-02-01), Heft 3, S. 621-628 |
Veröffentlichung: | 2003 |
Medientyp: | academicJournal |
ISSN: | 0022-2461 (print) |
DOI: | 10.1023/A:1021822614373 |
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