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Camargo, J.
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article
Influence of the sintering temperature on ferroelectric properties of potassium-sodium niobate piezoelectric ceramics
Abstract
<jats:p> The effect of sintering condition on structure, microstructure, and ferroelectric properties of ([Formula: see text][Formula: see text][Formula: see text] ([Formula: see text][Formula: see text][Formula: see text]- O<jats:sub>3</jats:sub> (KNL–NTS) has been investigated. Ceramic powders have been synthesized by the solid-state reaction method and sintered at different temperatures (1115[Formula: see text]C, 1125[Formula: see text]C, and 1140[Formula: see text]C). Then, samples were characterized by thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, and impedance spectroscopy. Through XRD results, the perovskite structure and small peaks corresponding to a secondary phase were detected. Ceramics processed at the highest temperatures showed higher densities and good piezoelectric properties ([Formula: see text], [Formula: see text], and [Formula: see text], particularly specimens sintered at 1125[Formula: see text]C presented the highest piezoelectric performance. </jats:p>