Comparative study of two lead-free piezoceramics using diffraction techniques

Schmitt, L.A.; Hinterstein, M.; Kleebe, H.-J.; Fuess, H.

doi:10.1107/S0021889810015980

Figure 3
Selected-area electron diffraction (SAED) patterns of the [011]_c, [111]_c and [013]_c zone axes. Arrows indicate the 1/2{ooo} and 1/2{ooe} superstructure reflections, where R means rhombohedral and T tetragonal. The left-hand column shows the zone axis diffraction patterns for sample 92-06-02 and the right-hand column those for 94-05-01. (a) The weak intensity of the 1/2{ooo} superlattice reflections, due to a low proportion of the rhombohedral phase. (b) The bright intensity of the 1/2{ooo} superlattice reflections, implying a high proportion of the rhombohedral phase. (c) The bright intensity of the 1/2{ooe} superlattice reflections, due to a high fraction of the tetragonal phase. (d) The weak intensity of the 1/2{ooe} superstructure reflections, signifying a low fraction of the tetragonal phase. (e) In the [013]_c zone both superstructure reflections are visible. The 1/2{ooo} are weaker than the 1/2{ooe} superlattice reflections. Streaking of the 1/2{ooe} superlattice reflections in the [100] direction is visible. (f) In contrast with Fig. 2

(e), the 1/2{ooo} superstructure reflections are stronger than the 1/2{ooe}, which is consistent with observations along the [011]_c and [111]_c zone axes.

JOURNAL OF
APPLIED
CRYSTALLOGRAPHY

ISSN: 1600-5767

Volume 43| Part 4| May 2010| Pages 805-810

doi:10.1107/S0021889810015980

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