Abstract
The lead free ceramics of two different stoichiometric 0.9(Bi0.5Na0.5)TiO3-0.1Ba(Ti1−x Zr x )O3 (abbreviated as BNBTZ-100x, x = 0, 0.045, 0.050, 0.055, 0.060) and 0.9(Bi0.5Na0.5−y Li y )TiO3-0.1Ba(Ti0.945Zr0.055)O3 (abbreviated as BNLBTZ-100y, y = 0, 0.015, 0.025, 0.035, 0.05, 0.075, 0.10, 0.125) compositions were prepared by the conventional ceramic fabrication technique. The crystal structure, dielectric and piezoelectric properties of the ceramics were investigated. All the ceramics formed single-phase solid solutions with tetragonal pervoskite structure, which was affected obviously by the addition of Zr and Li. The T m of the BNBZT-100x ceramics trends to increase whereas the T d trends to decrease as Zr content increases. And the T d of the BNLBZT-100y increases from 107 to 157 °C when y increases from 0 to 0.015, but decreases sharply as y increases further. The d 33 and k p of the BNBTZ-100x ceramics tend to increase with the addition of Zr. The maximum values of d 33 and k p, 156 pC/N and 18.9%, are obtained when x = 0.055. The d 33 of the BNLBTZ-100y ceramics keep almost unchanged when y increases from 0 to 0.035. And maximum value of k p, 16.3%, of the BNLBTZ-100y ceramics is obtained when y = 0.015.
Published Version
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