Exploració per autor "Pérez Pérez, Rafael"
Ara es mostren els items 1-12 de 12
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Contribution of reversible processes to the non-linear dielectric response in hard lead zirconate titanate ceramics
(2005-10)
Article
Accés obertSe estudia la dependencia entre la constante dieléctrica y las pérdidas con el campo eléctrico aplicado, así como entre la constante dieléctrica y las pérdidas dieléctricas. Los resultados muestran que las cerámicas PZT ... -
Dielectric and mechanical nonlinear behavior of Mn doped PMN-35PT ceramics
(2010-10)
Article
Accés obertThis paper presents an investigation on dielectric and mechanical nonlinear properties in Mn-doped PMN-35PT ceramics. The structural study of the ceramics verifies that the 1% mol Mn doped PMN-35PT is a pure perovskite ... -
Effects of poling process on KNN-modified piezoceramic properties
(2010-02)
Article
Accés restringit per política de l'editorialThe influence of the orthorhombic to tetragonal phase transition near room temperature in the poling process of KNN-modified piezoceramics was studied. Poling temperatures of 25° and 120°C were used. The percentage of 90° ... -
Evidence of temperature dependent domain wall dynamics in hard lead zirconate titanate piezoceramics
(American Institute of Physics (AIP), 2012-07)
Article
Accés obertThis work presents a study of the domain wall dynamics in Pb(Zr1−xTix)O3 (PZT)-based piezoceramics by means of the temperature dependence non-linear dielectric response and hysteresis loop measurements. In soft PZT, ... -
Extrinsic behaviour of PZT ceramics near the morphotropic phase transition
(2005-09)
Article
Accés obertThe aim of this work is to study the dependence of the linear and non-linear dielectric, piezoelectric and mechanical coefficients on the Ti fraction in PZT ceramic compositions near the morphotropic phase boundary. The ... -
Extrinsic coefficient characterisation of PZT ceramics near the morphotropic phase boundary
(2006-05)
Article
Accés obertEl comportamiento extrínseco de las cerámicas PZT, relacionado con el movimiento de las paredes de los dominios, comporta efectos no lineales grandes. Esta correspondencia entre efectos extrínsecos y no linealidades puede ... -
Influence of extrinsic contribution on the macroscopic properties of hard and soft lead zirconate titanate ceramics
(Institute of Electrical and Electronics Engineers (IEEE), 2008-12)
Article
Accés obertIn this work, the contribution of the extrinsic effect to the macroscopic properties in soft and hard lead zirconate titanate ceramics is directly evaluated. Close to the room temperature, poled hard ceramics show an ... -
No linealidad del efecto piezoeléctrico directo d33 en cerámicas PZT
(2006-05)
Article
Accés obertSe ha implementado una nueva técnica de medida aplicando un esfuerzo uniaxial sobre la muestra y midiendo la carga generada. Se aplica un esfuerzo suficientemente intenso para producir efectos no lineales, y se analiza ... -
Nonlinear behavior in a piezoelectric resonator: a method of analysis
(Institute of Electrical and Electronics Engineers (IEEE), 2000-07)
Article
Accés obertTheories used for understanding nonlinear behavior of piezoelectric resonators are usually only valid for a given range of amplitudes. Thus, important discrepancies can sometimes be observed between theory and experiment. ... -
Optimization of elastic nonlinear behavior measurements of ceramic piezoelectric resonators with burst excitation
(Institute of Electrical and Electronics Engineers (IEEE), 2007-10)
Article
Accés obertA system of nonlinear measurement and nonlinear elastic characterization of resonators is presented, which increases the possibilities and characteristics of the other classic nonlinear characterization methods. This ... -
Phase transition characteristics and dielectric properties of rare-earth (La, Pr, Nd, Gd) doped Ba(Zr0.09Ti0.91)O-3 ceramics
(2010-02-15)
Article
Accés restringit per política de l'editorialA-site deficient rare-earth doped barium zirconate titanate (BZT) ceramics (Ba1−yLn2y/3)Zr0.09Ti0.91O3 (Ln = La, Pr, Nd, Gd) are obtained by a modified solid-state reaction method. Perovskite-like single-phase compounds ... -
Unexpected dielectric response in lead zirconate titanate ceramics: The role of ferroelectric domain wall pinning effects
(2007-07)
Article
Accés obertTemperature dependent dielectric response has been measured in Pb(Zr1-xTix)O-3 ceramics. Samples of different compositions (x=0.40, 0.47, and 0.60), pure and doped with Nb-or Fe, were studied at temperatures between 15 and ...
