Dielectric and structural characteristics in barium lanthanum magnesium niobate

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

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24 Citations (Scopus)

Abstract

The dielectric properties and their related microstructural characteristics in solid solutions of (1-x)Ba(Mg1/3Nb2/3)O3 (BMN)-xLa(Mg2/3Nb1/3)O3 (LMN) (BLMN) were investigated by measuring the relative permittivity (εr), Q value, and temperature coefficient of resonator frequency (τf), and by observing the microstructure using transmission electron microscopy. The trend of variation of the temperature coefficient of the dielectric permittivity (τε) was the same for our solid solutions as that reported by Reaney et al. When the tolerance factor (t) was >1.01 in BLMN with composition x = 0 to 1.0, where the tilting of oxygen octahedra was not involved, the components of the microstructure included a disordered and transition phase as well 1:1 and 1:2 ordered phases. In the region where 1.01<t<0.96 with x = 0.2 to 0.7, the 1:1 order, the disorder, and the phase due to the antiphase tilting of oxygen octahedra were present. Finally, in the region where t<0.96 with x = 0.7 to 1.0, the microstructure of BLMN was the same as that of the pure LMN, including the 1:1 order and the antiphase, inphase tilting of oxygen octahedra, and the antiparallel shift of A-site cations.

Original languageEnglish
Pages (from-to)937-942
Number of pages6
JournalJournal of the American Ceramic Society
Volume83
Issue number4
Publication statusPublished - 2000

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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    Lee, H. J., Park, H. M., Cho, Y. K., Ryu, H., Paik, J. H., Nahm, S., & Byun, J. D. (2000). Dielectric and structural characteristics in barium lanthanum magnesium niobate. Journal of the American Ceramic Society, 83(4), 937-942.