Synthesis and cationic ordering structure of samarium-doped lead magnesium niobate ceramics
- Korea Inst. of Science and Technology, Seoul (Korea, Republic of). Div. of Ceramics
The pyrochlore-free 10 mol% Sm{sub 2}O{sub 3}-doped/undoped Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3} ceramics were fabricated and their cationic ordering structures were investigated by X-ray/electron diffraction techniques. In the X-ray diffraction patterns, only fundamental diffraction peaks were observed for the undoped Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}, while the (h + 1/2 k + 1/2 l + 1/2) superlattice reflections were also observed for the 10 mol% Sm{sub 2}O{sub 3}-doped Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}. In the electron diffraction patterns, the (h + 1/2 k + 1/2 l + 1/2) superlattice reflections as well as the fundamental diffraction spots were observed for the undoped and the 10 mol% Sm{sub 2}O{sub 3}-doped Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}, but the intensities of the superlattice reflections were stronger for the 10 mol% Sm{sub 2}O{sub 3}-doped Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}. It has been experimentally assured that Sm-doping enhances the 1:1 ordering of Mg{sup 2+} and Nb{sup 5+} ions in Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}.
- OSTI ID:
- 514714
- Journal Information:
- Materials Research Bulletin, Vol. 32, Issue 6; Other Information: PBD: Jun 1997
- Country of Publication:
- United States
- Language:
- English
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