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A new system of BNT‐based multi‐component lead‐free piezoelectric ceramics, [Bi 1– z (Na 1– x – y – z K x Li y )] 0.5 Ba z TiO 3 , was prepared by conventional ceramic technique and the electrical properties of the ceramics were studied. The analysis of X‐ray diffraction shows that all ceramics investigated can form a pure perovskite phase. The ceramics exhibit good piezoelec‐ tric performances and strong ferroelectricity: piezoelectric constant d 33 = 205 pC/N, electromechanical coupling factor k P = 37.0%, remanent polarization P r = 38.5 µC/cm 2 , coercive field E c = 2.80 kV/mm, and high depolarization temperature T d . It is obvious that [Bi 1– z (Na 1– x – y – z K x Li y )] 0.5 Ba z TiO 3 ceramics can be used in practical devices. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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Lin et al. (2005) studied this question.
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