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Crystal Structure of Ba(Mg1/3Nb2/3)O3 - La(Mg2/3Nb1/3)O3Complex Perovskite Compound

Ba(Mg1/3Nb2/3)O3 - La(Mg2/3Nb1/3)O3복합 페로브스카이트 화합물의 결정구조

  • 백종후 (요업기술원 전자소재기술개발사업단) ;
  • 이미재 (요업기술원 전자소재기술개발사업단) ;
  • 최병현 (요업기술원 전자소재기술개발사업단) ;
  • 지미정 (요업기술원 전자소재기술개발사업단) ;
  • 임은경 (요업기술원 전자소재기술개발사업단) ;
  • 남산 (고려대학교 재료공학부)
  • Published : 2004.07.01

Abstract

Crystal structure of $(Ba-{1-x}La_x)[Mg_\frac{1+x}{3}}Nb_\frac{{2-x}{3}}]O_3$ (BLMN) ceramics with 0\leq1x \geq was investigated using synchrotron X-ray powder diffraction (XRD) and high reso(B $a_{l-x}$L $a_{x}$)[M $g_{(1+x)}$3/N $b_{(2-x)/3}$$O_3$lution transmission electron microscopy (HRTEM). When the La content, x, is above 0.1, the 1:2 ordered hexagonal structure found in Ba($Mg_\frac{1}{3}Nb_\frac{2}{3}})O_3$(BMN) was transformed into 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 was transformed into 1:1 ordered structure which has cation displacement and in-phase and anti-phase tilt of octahedra.

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