Exploració per autor "García García, José Eduardo"
Ara es mostren els items 21-40 de 74
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Exploring different sintering atmospheres to reduce nonlinear response of modified KNN piezoceramics
Vendrell Villafruela, Xavier; García García, José Eduardo; Rubio Marcos, F.; Ochoa Guerrero, Diego A.; Mestres Vila, Lourdes; Fernández, José F. (Elsevier, 2013-04)
Article
Accés restringit per política de l'editorialDense lead-free (K0.44Na0.52Li0.04)(Nb0.86Ta0.10Sb0.04)O3 piezoelectric ceramics are prepared by the conventional mixed oxide method. The effect of different sintering conditions (synthetic air, O2 and Ar) on some structural, ... -
Exploring the electromechanical response and electric field-induced dielectric anomalies in PMN–PT electroceramics
Guerra, José de los Santos; Guarany, Cristiano A.; Lima, Elton C.; Borges de Araújo, Eudes; García García, José Eduardo (2021-06-23)
Article
Accés obert<jats:p> Electromechanical and dielectric properties of PMN–PT ferroelectric ceramics are investigated. In particular, dielectric response studies focus on the investigation of the influence of the DC applied electric field ... -
Extensive domain wall contribution to strain in a (K,Na)NbO3-based lead-free piezoceramics quantified from high energy X-ray diffraction
Ochoa Guerrero, Diego A.; Esteves, Giovanni; Iamsasri, Thanakorn; Rubio-Marcos, Fernando; Fernández Lozano, José Francisco; García García, José Eduardo; Jones, Jacob L. (Elsevier, 2016-08)
Article
Accés obertThe origins of high piezoelectric properties in the lead-free (K,Na)NbO3-based tetragonal composition (K0.44Na0.52Li0.04)(Nb0.86Ta0.10Sb0.04)O3 (KNL-NTS) is investigated by quantifying the intrinsic and extrinsic contributions ... -
Extrinsic behaviour of PZT ceramics near the morphotropic phase transition
Albareda Tiana, Alfonso; Pérez Pérez, Rafael; García García, José Eduardo; Tiana Alsina, Jordi; Pérez Codina, Estel (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
Albareda Tiana, Alfonso; Pérez Pérez, Rafael; García García, José Eduardo; Tiana Alsina, Jordi; Pérez Codina, Estel; Gorri Ochoa, José Antonio (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 ... -
Extrinsic contribution and instability properties in lead-based and lead-free piezoceramics
García García, José Eduardo (2015-11-01)
Article
Accés obertPiezoceramic materials generally exhibit a notable instability of their functional properties when they work under real external conditions. This undesirable effect, known as nonlinear behavior, is mostly associated with ... -
Extrinsic response enhancement at the polymorphic phase boundary in piezoelectric materials
Ochoa Guerrero, Diego A.; Esteves, Giovanni; Jones, Jacob L.; Rubio-Marcos, Fernando; Fernández Lozano, José Francisco; García García, José Eduardo (2016-04-04)
Article
Accés obertPolymorphic phase boundaries (PPBs) in piezoelectric materials have attracted significant interest in recent years, in particular because of the unique properties that can be found in their vicinity. However, to fully ... -
Features of the structural and dielectric properties in BaTi1-xSnxO3 ferroelectric ceramics
Flávio Dornelas, Ramon Guilherme; Silva, Atair C.; García García, José Eduardo; Guerra, José de los Santos (2023-07-27)
Article
Accés restringit per política de l'editorialThe demand to produce clean energy has been increasing over the last years due to the various climate changes, which are strongly afflicting the world. Therefore, it is necessary to implement new and alternative energy ... -
Fine-grained high-performance Ba0.85Ca0.15 Zr0.1Ti0.9O3 piezoceramics obtained by current-controlled flash sintering of nanopowders
López Blanco, Samuel; Ochoa Guerrero, Diego A.; Amorín, Harvey; Castro, Alicia; Algueró, Miguel; García García, José Eduardo (Elsevier, 2023-12)
Article
Accés obertDue to environmental concerns, extensive research has been carried out to develop high-performance lead-free piezoceramics capable of replacing commercial lead-based materials. The lead-free (Ba0.7Ca0.3)TiO3 -Ba(Zr0.2Ti0.8)O3 ... -
Flash sintering of potassium-sodium niobate-based piezoceramics: refining (micro)structure for properties enhancement
López Blanco, Samuel; Rubio Marcos, Fernando; Barrón Portela, Andrea; Ochoa Guerrero, Diego A.; García García, José Eduardo (Elsevier, 2024-03)
Article
Accés restringit per política de l'editorialLow-consumption ceramics processing routes are expected to replace conventional ones due to environmental concerns. In this context, flash sintering is garnering interest because it allows dense ceramics to be obtained in ... -
Growth and physical properties of highly oriented La-doped (K,Na)NbO3 ferroelectric thin films
Vendrell Villafruela, Xavier; Raymond, Oscar; Ochoa Guerrero, Diego A.; García García, José Eduardo; Mestres, Lourdes (2015-02-27)
Article
Accés obertLead-free (K,Na)NbO3 (KNN) and La doped (K,Na)NbO3 (KNN-La) thin films are grown on SrTiO3 substrates using the chemical solution deposition method. The effect of adding different amounts of Na and K excess (0-20 mol%) is ... -
High stability of properties in morphotropic phase boundary Bi0.5Na0.5TiO3-BaTiO3 piezoceramics
Machado, Rodrigo; Ochoa Guerrero, Diego A.; dos Santos, Valdeci B.; Cerdeiras Montero, Elena; Mestres Vila, Lourdes; García García, José Eduardo (2016-11-15)
Article
Accés obertThe (1-x)Bi0.5Na0.5TiO3–xBaTiO3 (BNT-xBT) system with composition at its morphotropic phase boundary (MPB) has received significant attention because of their attractive properties as lead-free piezoceramics. Although the ... -
High-precision time-of-flight determination algorithm for ultrasonic flow measurement
Suñol Galofre, Francesc Xavier; Ochoa Guerrero, Diego A.; García García, José Eduardo (2019)
Article
Accés obertCommercial time-of-flight (TOF) ultrasonic flowme- ters are rapidly expanding in the general industry. Among the different techniques that can be applied to determine the TOF of ultrasonic waves, the cross-correlation ... -
Improving the functional properties of (K0.5Na0.5)NbO3 piezoceramics by acceptor doping
Vendrell Villafruela, Xavier; García García, José Eduardo; Bril, X; Ochoa Guerrero, Diego A.; Mestres, Lourdes; Dezanneau, Guillem (Elsevier, 2015-01-01)
Article
Accés obertZrO2 and TiO2 modified lead-free (K0.5Na0.5)NbO3 (KNN) piezoelectric ceramics are prepared by a conventional solid-state reaction. The effect of acceptor doping on structural and functional properties is investigated. A ... -
Influence of extrinsic contribution on the macroscopic properties of hard and soft lead zirconate titanate ceramics
Ochoa Guerrero, Diego A.; García García, José Eduardo; Pérez Pérez, Rafael; Albareda Tiana, Alfonso (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 ... -
Influence of Mn-doping on phase transition characteristics and relaxor behaviour of lead lanthanum zirconate titanate ceramics
Pérez Delfín, Enrique; García García, José Eduardo; Vega García, A.; Guerrero, Fidel; Eiras, Jose A. (Elsevier, 2012-07)
Article
Accés restringit per política de l'editorialChanges in dielectric response features of lead lanthanum zirconate titanate (PLZT) ceramics by manganese addition are reported in the present work. Both the PLZT relaxor behaviour and the frequency dependence of the room ... -
Influence of the type of rare-earth cation on electrical properties of Ba(Zr,Ti)O3 ceramics
Delgado del Toro, Ariel; Guerrero Peña, E; Leyet Ruiz, Yuri; Guerrero Zayas, Fidel; Mestres, Lourdes; Ochoa Guerrero, Diego A.; García García, José Eduardo (2011-02)
Article
Accés obertEn este artículo es investigado el efecto del radio iónico de diferentes cationes de tierras raras sobre las propiedades eléctricas del compuesto Ba(Zr,Ti)O3. La cerámica BaZr0.09Ti0.9O3 fue dopada con iones de Gd3+, Pr3+ ... -
Insight into the dynamics of low temperature dielectric relaxation of ordinary perovskite ferroelectrics
Levit Valenzuela, Rafael; Ochoa Guerrero, Diego A.; Martínez García, Julio Cesar; García García, José Eduardo (2017-11-10)
Article
Accés obertThe temperature dependence of the dielectric response of ordinary ferroelectric materials exhibits a frequency-independent anomalous peak as a manifestation of the ferroelectric to paraelectric phase transition. A second ... -
Insights into the early size effects of lead-free piezoelectric Ba0.85Ca0.15Zr0.1Ti0.9O3
Amorín, Harvey; Venet, Michel; García García, José Eduardo; Ochoa Guerrero, Diego A.; Ramos Sainz, Pablo; López Sánchez, Jesús; Rubio Zuazo, Juan; Castro Lozano, Alicia; Algueró Giménez, Miguel (John Wiley & sons, 2023-11-15)
Article
Accés obertBa0.85Ca0.15Zr0.1Ti0.9O3 (BCZT) stands out among lead-free ferroelectric oxides under consideration to replace state-of-the-art high-sensitivity piezoelectric Pb(Zr,Ti)O3, for a range of energy conversion ceramic technologies. ... -
Interrelationship between phase transition characteristics and piezoelectric response in lead lanthanum zirconate titanate relaxor ceramics
Guerra, J.D.S.; García García, José Eduardo; Ochoa Guerrero, Diego A.; Pelaíz Barranco, Aimé; García Zaldívar, Osmany; Calderón Piñar, F. (2012)
Article
Accés restringit per política de l'editorialDielectric and piezoelectric responses are investigated in relaxor-like lanthanum-modified lead zirconate titanate (PLZT) ceramics, for a La/Zr/Ti ratio of x/60/40 (x = 8 and 10 at.%), obtained by the conventional ceramic ...