Zobrazeno 1 - 10 of 13 pro vyhledávání: '"Ceràmica piezoelèctrica"'
1
Assessment of the functional properties stability in (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 piezoceramics: huge dielectric and piezoelectric nonlinearity
Autor: María E. Villafuerte-Castrejón, Jose E. García, Francesc Suñol, Armando Reyes-Montero, Lorena Pardo, Diego A. Ochoa
Publikováno v: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Recercat. Dipósit de la Recerca de Catalunya
instname
The (Ba,Ca)(Zr,Ti)O3 ceramic system has received special attention in recent years because it may lead to promising lead-free piezoceramics. However, the stability of the functional properties of these materials is an important issue that requires gr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f50e32c676e3415f3e9d36e00fcf8feb
http://hdl.handle.net/2117/127839
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3
Understanding the piezoelectric properties in potassium-sodium niobate-based lead-free piezoceramics: Interrelationship between intrinsic and extrinsic factors
Autor: Rocío Estefanía Rojas-Hernandez, Miriam Susana Castro, Fernando Rubio-Marcos, Jose E. García, José F. Fernández, Leandro Alfredo Ramajo, Diego A. Ochoa
Publikováno v: Recercat. Dipósit de la Recerca de Catalunya
instname
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Lead zirconate titanate (PZT) based ceramics are currently enjoying a wide use in piezoelectric devices despite lead toxicity. Due to growing environmental concerns, the attention on piezoelectric ceramics has been moving to lead-free materials, in p
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aaa42eb5b584c564b8cbbf460513f5b6
http://www.sciencedirect.com/science/article/pii/S0955221917302881
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4
Preisach modelling of nonlinear response in electrically biased lead zirconate titanate-based piezoceramics
Autor: Jose E. García, R. Pérez, Diego A. Ochoa
Publikováno v: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Recercat. Dipósit de la Recerca de Catalunya
instname
The alteration of the high-field electrical permittivity (nonlinear response) of PZT-based ceramics when an electrical bias field is applied is reported in this work. Large differences are observed between soft and hard PZT behaviours. While in soft
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::035f4402ea5c325a979586eb4b254941
https://doi.org/10.1007/s00339-012-7492-3
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5
Extensive domain wall contribution to strain in a (K,Na)NbO3-based lead-free piezoceramics quantified from high energy X-ray diffraction
Autor: Jose E. García, Thanakorn Iamsasri, Jacob L. Jones, Giovanni Esteves, Diego A. Ochoa, Fernando Rubio-Marcos, José F. Fernández
Publikováno v: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Recercat. Dipósit de la Recerca de Catalunya
instname
The 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 from high energy X-ray
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67f972cfc1a7e226590ab685e8f69286
https://hdl.handle.net/2117/86801
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6
Preisach modeling of temperature-dependent ferroelectric response of piezoceramics at sub-switching regime
Autor: Diego A. Ochoa, Jose E. García
Publikováno v: Recercat. Dipósit de la Recerca de Catalunya
instname
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
The Preisach model is a classical method for describing nonlinear behavior in hysteretic systems. According to this model, a hysteretic system contains a collection of simple bistable units which are characterized by an internal field and a coercive
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::460be9c9203daa3d920484d3c20d6ef1
https://hdl.handle.net/2117/86800
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7
High stability of properties in morphotropic phase boundary Bi0.5Na0.5TiO3-BaTiO3 piezoceramics
Autor: Diego A. Ochoa, Lourdes Mestres, Valdeci B. dos Santos, Jose E. García, Rodrigo Machado, E. Cerdeiras
Publikováno v: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Recercat. Dipósit de la Recerca de Catalunya
instname
The (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 basic properties of this
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::25569af44e8f458f18809d34a33c8493
http://hdl.handle.net/2117/89339
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8
Improving the functional properties of (K0.5Na0.5)NbO3 piezoceramics by acceptor doping
Autor: Guilhem Dezanneau, Jose E. García, Xavier Vendrell, Lourdes Mestres, Diego A. Ochoa, X. Bril
Publikováno v: Journal of the European Ceramic Society
Journal of the European Ceramic Society, Elsevier, 2015, 35 (1), pp.125-130. ⟨10.1016/j.jeurceramsoc.2014.08.033⟩
Recercat. Dipósit de la Recerca de Catalunya
instname
Dipòsit Digital de la UB
Universidad de Barcelona
Universitat Jaume I
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
ZrO2 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 decrease in the Curie temperat
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cfd5aea196cb4d625b9e396238925124
https://hal.archives-ouvertes.fr/hal-01116307
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9
Efeito do dopante Ba sobre as propriedades estruturais e microestruturais de ceramicas Bi0.5Na0.5TiO3
Autor: Santos, Valdeci Bosco dos, Cerdeiras Montero, Elena, Mestres Vila, Lourdes, Machado, Rodrigo, Ochoa Guerrero, Diego A., García García, José Eduardo
Publikováno v: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Recercat. Dipósit de la Recerca de Catalunya
instname
Recently, Bi0,5Na0,5TiO3 (BNT) based ceramics has been widely studied as one promising material lead-free for piezoelectric applications. The Ba addition in BNT ((Bi0,5Na0,5)1-xBaxTiO3 - BNT-xBT) has attracted considerable attention due to the existe
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::1b4c11c5e178401ea46dcd2671381336
http://hdl.handle.net/2117/86661
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10
Exploring different sintering atmospheres to reduce nonlinear response of modified KNN piezoceramics
Autor: Jose E. García, Lourdes Mestres, Julio F. Fernández, Diego A. Ochoa, Xavier Vendrell, Fernando Rubio-Marcos
Publikováno v: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Recercat. Dipósit de la Recerca de Catalunya
instname
Dense 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, dielectric and piezoelec
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a675336ce7a2601526eeee9ea6eac016
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