Synthesis and Characterization of Lead Free (K0.465Na0.465Li0.07)NbO3-SrZrO3 Piezoceramics.

Mostafa, S. A. I.; Ewais, E. M. M.; Mohamed, A. A.

doi:10.21608/tims.2017.299445

Synthesis and Characterization of Lead Free (K0.465Na0.465Li0.07)NbO3-SrZrO3 Piezoceramics.

Document Type : Original research papers

Authors

¹ Tabbin Institute for Metallurgical Studies (TIMS), P.O. 109 Helwan, 11421 Cairo, Egypt.

² Refractory and Ceramic Materials Division (RCMD), Central Metallurgical R&D Institute, P.O. 87 Helwan, 11421 Cairo, Egypt.

³ Chemistry Department, Faculty of Science, Helwan University

10.21608/tims.2017.299445

Abstract

Lead-free piezoelectric ceramics composition: (1-x) (K_0.465Na_0.465Li_0.07) NbO₃-xSrZrO₃ (x = 0, 0.005, 0.050, 0.095, 0.140 and 0.185) have been synthesized by the conventional solid-state method. The effect of SrZrO₃ content on their phase structure and dielectric properties was studied. Phase composition, microstructure and dielectric constant also were investigated. It was found that SrZrO₃ diffuses into the K_0.465Na_0.465Li_0.07NbO₃lattice to form a solid solution during sintering. With increasing the SrZrO₃ content, the grain size becomes smaller. The dielectric properties of investigated ceramics were measured at room temperature and 1 kHz and 0.95 (K_0.465Na_0.465Li_0.07) NbO₃-0.05SrZrO₃ ceramic posses high dielectric constant.

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