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Published in:
13-12-2018
Structure and phase stability of lead-free antiferroelectric (Na0.96−xCa0.04Lix)(Nb0.96Zr0.04)O3 ceramics
Published in: Journal of Materials Science: Materials in Electronics | Issue 3/2019
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Abstract
(Na0.96−xCa0.04Lix)(Nb0.96Zr0.04)O3 (CZNNL) ceramics with high density were successfully prepared by the solid-state reaction method. The effect of Li dopants on the structure, electrical properties and stability of antiferroelectricity has been investigated. Enhanced antiferroelectric superlattice peaks was observed for CZNNL (x ≤ 0.01) using X-ray diffraction. Li substitution can effectively destabilize the antiferroelectric phase and correspondingly the ferroelectric phase can be enhanced. The field-induced polarization increase and the average grain size decrease with increasing Li concentration. The CZNNL (x = 0.01) ceramics can preserve the double polarization hysteresis loops at room temperature and at 120 °C.