%A H’Mok, H. %A Duarte, A. %A Portelles, J. %A Fuentes, J. %A Durruthy-Rodríguez, M. D. %A Raymond, O. %A Heiras, J. %A Cruz, M. P. %A Siqueiros, J. M. %D 2012 %T Study of Lead-free Ceramics of the [(K0.5Na0.5) 0.94Li 0.06] 0.97La0.01(Nb0.9Ta0.1)O3 Piezoelectric Composite %B 2012 %9 %! Study of Lead-free Ceramics of the [(K0.5Na0.5) 0.94Li 0.06] 0.97La0.01(Nb0.9Ta0.1)O3 Piezoelectric Composite %K %X [(K 0.5 Na 0.5 ) 0.94 Li 0.06 ] 0.97 La 0.01 (Nb 0.9 Ta 0.1 )O 3 lead-free ceramics have been prepared by the traditional ceramic method. The calcined powders were encapsulated and sintered in their own atmosphere. Our results reveal that Li + , La 3+ and Ta 5+ diffuse into the (K 0.5 Na 0.5 )NbO 3 lattice to form a solid solution with a perovskite structure. X-ray diffraction analysis showed a mixture of phases with a predominant orthorombic structure. The dielectric properties plotted vs temperature show a normal phase transition at 399 o C. The piezoelectric behavior is characterized by the values of k p = 0.34, Q m =137 and ε max =1906, allowing us to conclude that a substitute for PZT ceramics is within reach. %U https://revistacubanadefisica.org/index.php/rcf/article/view?path= %J Revista Cubana de Física %0 Journal Article %& 28 %P 5 %V 29 %N 1 %@ 2224-7939 %8 2012-06-14 %7 2012-06-11