The effect of sintering condition on structure,microstructure,and ferroelectric properties of(K_(0.44)Na_(0.52)Li_(0.04))(Nb_(0.86)Ta_(0.10)Sb_(0.04))-O_(3)(KNL-NTS)has been investigated.Ceramic powders have been synt...The effect of sintering condition on structure,microstructure,and ferroelectric properties of(K_(0.44)Na_(0.52)Li_(0.04))(Nb_(0.86)Ta_(0.10)Sb_(0.04))-O_(3)(KNL-NTS)has been investigated.Ceramic powders have been synthesized by the solid-state reaction method and sintered at different temperatures(1115℃,1125℃,and 1140℃).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(d_(33),K_(p),and K_(t)),particularly specimens sintered at 1125℃ presented the highest piezoelectric performance.展开更多
基金The authors are grateful to the National Council for Scientific and Technological Development(CNPq)and the Coordination for the Improvement of Higher Education Personnel(CAPES)for the financial support granted during this research.The authors are grateful to CONICET,ANPCyT,University of Mar del Plata(Argentina),and to the MINECO(Spain)project MAT2017-86450-C4-1-R for the financial support provided for this research.
文摘The effect of sintering condition on structure,microstructure,and ferroelectric properties of(K_(0.44)Na_(0.52)Li_(0.04))(Nb_(0.86)Ta_(0.10)Sb_(0.04))-O_(3)(KNL-NTS)has been investigated.Ceramic powders have been synthesized by the solid-state reaction method and sintered at different temperatures(1115℃,1125℃,and 1140℃).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(d_(33),K_(p),and K_(t)),particularly specimens sintered at 1125℃ presented the highest piezoelectric performance.
