Microstructural observations in barium calcium magnesium niobate

Hwack Joo Lee, Hyun Min Park, Yang Koo Cho, Hyun Ryu, Yong Won Song, Jong Hoo Paik, Sahn Nahm, Jae Dong Byun

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Microstructural studies on (1-x)Ba(Mg1/3Nb2/3)O3-xCa(Mg1/3Nb2/3)O3 (BCMN) complex perovskite compounds, which are mixtures of Ba(Mg1/3Nb2/3)O3 (BMN) and Ca(Mg1/3-Nb2/3)O3 (CMN), were conducted using scanning electron microscopy, transmission electron microscopy, and X-ray diffractometry. Pure BMN and CMN both have a 1:2 ordered structure, via the chemical ordering of B-site cations; however, the tilting of oxygen octahedra is involved in pure CMN, whose structure has a 1:2 ordered monoclinic unit cell that is characterized by (±1/6,±1/6,±1/6)-type superlattice reflections in electron diffraction patterns along the [110] zone axis that is based on a simple cubic perovskite. Studies of the morphologic differences have indicated two types of inhomogeneities in a mixture of the BCMN system: (i) a rather large-scale segregation (i.e., grain sizes of several micrometers), where the grains are separated compositionally as being barium-rich or calcium-rich, and (ii) fine-scale lamellar-type segregations 20 nm wide and 200 nm long. The segregation that is caused by Ba and Ca ions can be identified by the difference of superlattice modulations from high-resolution transmission electron microscopy lattice images.

Original languageEnglish
Pages (from-to)2267-2272
Number of pages6
JournalJournal of the American Ceramic Society
Volume83
Issue number9
Publication statusPublished - 2000 Sep 1

Fingerprint

perovskite
barium
Barium
Perovskite
Magnesium
transmission electron microscopy
Calcium
magnesium
calcium
High resolution transmission electron microscopy
Electron diffraction
inhomogeneity
X ray diffraction analysis
Diffraction patterns
diffraction
Cations
grain size
cation
Positive ions
scanning electron microscopy

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Lee, H. J., Park, H. M., Cho, Y. K., Ryu, H., Song, Y. W., Paik, J. H., ... Byun, J. D. (2000). Microstructural observations in barium calcium magnesium niobate. Journal of the American Ceramic Society, 83(9), 2267-2272.

Microstructural observations in barium calcium magnesium niobate. / Lee, Hwack Joo; Park, Hyun Min; Cho, Yang Koo; Ryu, Hyun; Song, Yong Won; Paik, Jong Hoo; Nahm, Sahn; Byun, Jae Dong.

In: Journal of the American Ceramic Society, Vol. 83, No. 9, 01.09.2000, p. 2267-2272.

Research output: Contribution to journalArticle

Lee, HJ, Park, HM, Cho, YK, Ryu, H, Song, YW, Paik, JH, Nahm, S & Byun, JD 2000, 'Microstructural observations in barium calcium magnesium niobate', Journal of the American Ceramic Society, vol. 83, no. 9, pp. 2267-2272.
Lee HJ, Park HM, Cho YK, Ryu H, Song YW, Paik JH et al. Microstructural observations in barium calcium magnesium niobate. Journal of the American Ceramic Society. 2000 Sep 1;83(9):2267-2272.
Lee, Hwack Joo ; Park, Hyun Min ; Cho, Yang Koo ; Ryu, Hyun ; Song, Yong Won ; Paik, Jong Hoo ; Nahm, Sahn ; Byun, Jae Dong. / Microstructural observations in barium calcium magnesium niobate. In: Journal of the American Ceramic Society. 2000 ; Vol. 83, No. 9. pp. 2267-2272.
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