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Persistent URL http://purl.org/net/epubs/work/66000
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Record Id 66000
Title Unusual Phase Behavior in the Piezoelectric Perovskite System, Li xNa1-xNbO3
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Abstract The system LixNa1–xNbO3 has been studied by using a combination of X-ray and neutron powder diffraction and 23Na solid-state NMR spectroscopy. For x = 0.05 we confirm a single polar orthorhombic phase. For 0.08 ? x ? 0.20 phase mixtures of this orthorhombic phase, together with a rhombohedral phase, isostructural with the low-temperature ferroelectric polymorph of NaNbO3, are observed. The relative fractions of these two phases are shown to be critically dependent on synthetic conditions: the rhombohedral phase is favored by higher annealing temperatures and rapid cooling. We also observe that the orthorhombic phase transforms slowly to the rhombohedral phase on standing in air at ambient temperature. For 0.25 ? x ? 0.90 two rhombohedral phases coexist, one Na-rich and the other Li-rich. In this region the phase behavior is independent of reaction conditions.
Organisation ISIS , ISIS-HRPD , STFC
Keywords ISIS 2013
Funding Information
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Language English (EN)
Type Details URI(s) Local file(s) Year
Journal Article Inorg Chem 52, no. 15 (2013): 8872-8800. doi:10.1021/ic401061t 2013
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