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- Title
ESTUDIO DE CERÁMICAS LIBRES DE PLOMO DEL COMPUESTO PIEZOELÉCTRICO [(K<sub>0.5</sub>Na<sub>0.5</sub>)<sub>0.94</sub>Li<sub>0.06</sub>]<sub>0.97</sub>La<sub>0.01</sub>(Nb<sub>0.9</sub>Ta<sub>0.1</sub>)O<sub>3</sub>.
- Authors
H'MOK, H.; DUARTE, A.; PORTELLES, J.; FUENTES, J.; DURRUTHY-RODRÍGUEZ, M. D.; RAYMOND, O.; HEIRAS, J.; CRUZ, M. P.; SIQUEIROS, J. M.
- 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.
- Subjects
LEAD-free ceramics; DIELECTRIC properties of piezoelectric ceramics; CRYSTAL structure; FERROELECTRIC ceramics; MATERIALS science; MATHEMATICAL models
- Publication
Revista Cubana de Física, 2012, Vol 29, Issue 1, p28
- ISSN
0253-9268
- Publication type
Article