Study of Lead-free Ceramics of the [(K0.5Na0.5) 0.94Li 0.06] 0.97La0.01(Nb0.9Ta0.1)O3 Piezoelectric Composite

  • H. H’Mok Facultad de Física, Universidad de La Habana
  • A. Duarte Facultad de Física, Universidad de La Habana
  • J. Portelles Facultad de Física, Universidad de La Habana
  • J. Fuentes Facultad de Física, Universidad de La Habana
  • M. D. Durruthy-Rodríguez Instituto Cibernética, Matemáticas y Física
  • O. Raymond Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México
  • J. Heiras Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México
  • M. P. Cruz Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México
  • J. M. Siqueiros Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México

Abstract

[(K0.5Na0.5)0.94Li0.06]0.97La0.01(Nb0.9Ta0.1)O3 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+, La3+ and Ta5+ diffuse into the (K0.5Na0.5)NbO3 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 399oC. The piezoelectric behavior is characterized by the values of kp= 0.34, Qm=137 and εmax=1906, allowing us to conclude that a substitute for PZT ceramics is within reach.

Published
Jun 14, 2012
How to Cite
H’MOK, H. et al. Study of Lead-free Ceramics of the [(K0.5Na0.5) 0.94Li 0.06] 0.97La0.01(Nb0.9Ta0.1)O3 Piezoelectric Composite. Revista Cubana de Física, [S.l.], v. 29, n. 1, p. 28-32, june 2012. ISSN 2224-7939. Available at: <https://revistacubanadefisica.org/index.php/rcf/article/view/RCF_29-1_28_2012>. Date accessed: 28 jan. 2022.
Section
Original Articles