Exploració per tema "Piezoelectricity"
Ara es mostren els items 41-60 de 76
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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 ... -
Flexoelectric effect in non-homogenous dielectrics
(Universitat Politècnica de Catalunya, 2022-06)
Projecte Final de Màster Oficial
Accés obertFlexoelectricity is a different electromechanical coupling without this material symmetry limitations, hence universal for all dielectrics. Flexoelectricity relies on symmetry breaking beyond the material chemistry by ... -
Flexoelectric metamaterials optimization
(Universitat Politècnica de Catalunya, 2021-09-13)
Projecte Final de Màster Oficial
Accés obertElectromechanical couplings play an important role in our day to day lives, as they are present in both natural biological systems and technological applications. Piezoelectricity, the two way coupling between strain and ... -
Generación d'energia eléctrica por efecto piezoeléctrico de las baldosas del pavimento de una zona a estudiar de la terminal T1 del aeropuerto del Prat
(Universitat Politècnica de Catalunya, 2018-02-01)
Treball Final de Grau
Accés restringit per decisió de l'autorEn el mundo existe una demanda energética evidente a simple vista, lo cual, ocasiona que una parte del mundo, individuos preparados, enfoquen su trabajo al estudio e implementación de nuevas tecnologías las cuales proporcionan ... -
Generación de electricidad con piezoeléctricos para iluminar un panel publicitario de LEDs
(Universitat Politècnica de Catalunya, 2010-03)
Projecte/Treball Final de Carrera
Accés restringit per decisió de l'autorEn este proyecto se juntan todos los conceptos adquiridos en esta carrera. Se encontrarán aspectos de Materiales, Electrónica, Administración de Empresas y Proyectos entre otros. Lo que leerán a continuación es el diseño, ... -
Geometrically polarized architected dielectrics with apparent piezoelectricity
(2021-12)
Article
Accés obertThrough the suitable geometry of a repeating unit, a metamaterial can exhibit a property not present in the base material. Here, we propose a class of low area-fraction, bending-dominated metamaterials that exhibit apparent ... -
High performance computing for flexoelectric devices
(Universitat Politècnica de Catalunya, 2020-10)
Projecte Final de Màster Oficial
Accés obertThis exiting development requires a robust mathematical and computational framework for solving flexoelectric boundary value problems, mathematically a coupled system of 4th-order partial differential equations, in general ... -
High stability of properties in morphotropic phase boundary Bi0.5Na0.5TiO3-BaTiO3 piezoceramics
(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 ... -
Human body activity energy harvesting system with a piezoelectric transducer
(Universitat Politècnica de Catalunya, 2017-06)
Treball Final de Grau
Accés obertThe objective of this project is the energy quantification that can be collected from the movement of the human body with a simple scheme of conversion with a piezoelectric transducer. It will be examined how to accumulate ... -
Hydrocavitation piezoelectric ocean wave energy harvesting
(2021-10-01)
Article
Accés obertThe possibility to convert the ocean wave energy into electrical energy by piezoelectric layers has excited the imagination of ocean wave energy conversion designers for decades owing to its relative robustness (no mechanical ... -
Hydroxyapatite-filled osteoinductive and piezoelectric nanofibers for bone tissue engineering
(2023-12-31)
Article
Accés obertIn this study entitled “Hydroxyapatite-filled osteoinductive and piezoelectric nanofibers for bone tissue engineering”, we describe the development of novel hydroxyapatite (HAp)-filled osteoinductive piezoelectric ... -
Implementación de sensores piezoeléctricos para la generación eléctrica bajo calzada: aplicaciones en el Aeropuerto de Barcelona
(Universitat Politècnica de Catalunya, 2017-07-13)
Treball Final de Grau
Accés obertThe man has been trying to find an alternative source of energy to fossil fuels for years. Most of them either obtain electrical energy or other types of energy. Given this setting, research on renewable energies has been ... -
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 ... -
Interrogation unit and SAW RDL sensor design for automatic measurement of temperature and stress
(Universitat Politècnica de Catalunya, 2018-07-31)
Treball Final de Grau
Accés obert
Realitzat a/amb: University of Colorado Colorado SpringsTechnology advances towards the concept of IoT (Internet of Things), which is the idea of a global network that integrates electronics and computer-based systems on physical devices continuously sharing data, resulting in ... -
Molecular dynamics simulations of polarization domains and flexoelectricity in BaTiO3
(Universitat Politècnica de Catalunya, 2018-06-27)
Projecte Final de Màster Oficial
Accés obertThis thesis is a part of a project started in December 2016 in collaboration with Prof. Jorge Alcalá Cabrelles (UPC, Barcelona) and Dr. Jan Ocenasek (ZCU institute, Czech Republic) aiming to perform piezoelectric and ... -
Monitorización e identificación de puntos calientes térmicos en estructuras utilizando transductores piezoeléctricos
(Universitat Politècnica de Catalunya, 2022-06-30)
Treball Final de Grau
Accés obertLa identificació de punts calents tèrmics en estructures és un camp del monitoratge que encara es troba en fase preliminar. És, per això, que cal continuar amb l’estudi per trobar eines i metodologies que permetin detectar, ... -
Multiscale modeling of surface effects in small-scale electromechanics
(Universitat Politècnica de Catalunya, 2020-09-29)
Projecte Final de Màster Oficial
Accés restringit per decisió de l'autor -
New insights into the optical control of macroscopic polarization in ferroelectric crystals
(Universitat Politècnica de Catalunya, 2017-06)
Treball Final de Grau
Accés obert -
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 ... -
Novel readout techniques for nanoelectromechanical resonators
(Universitat Politècnica de Catalunya, 2017-05)
Projecte Final de Màster Oficial
Accés restringit per decisió de l'autor
Realitzat a/amb: École polytechnique fédérale de LausanneNanoelectromechanical resonators have shown outstanding performance in mass sensing and heavy filtering applications due to their exceptional sensitivities and high quality factors, among other characteristics. The ...