Browsing by Subject "Piezoelectric ceramics"
Now showing items 1-20 of 20
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Assessment of the functional properties stability in (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 piezoceramics: huge dielectric and piezoelectric nonlinearity
(2019-02-05)
Article
Open AccessThe (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 ... -
Disseny i fabricació del prototip d'un sistema d'excitació inercial per a la captació d'energia elèctrica a partir del pas de vehicles rodats: piezoelèctrics a flexió.
(Universitat Politècnica de Catalunya, 2017-10-10)
Bachelor thesis
Restricted access - author's decision -
Efeito do dopante Ba sobre as propriedades estruturais e microestruturais de ceramicas Bi0.5Na0.5TiO3
(2015)
Conference report
Restricted access - publisher's policyRecently, 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 ... -
Effect of lanthanide doping on structural, microstructural and functional properties of K0.5Na0.5NbO3 lead-free piezoceramics
(2016-11-15)
Article
Open AccessLanthanides-doped K0.5Na0.5NbO3(KNN) lead-free piezoelectric ceramics are prepared by conventional solid-state reaction. The effects of lanthanum concentration and the lanthanide type on the structure, microstructure and ... -
Effects of poling process on KNN-modified piezoceramic properties
(2010-02)
Article
Restricted access - publisher's policyThe 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° ... -
Elastic, dielectric and electromechanical properties of (Bi0.5Na0.5)TiO3-BaTiO3 piezoceramics at the morphotropic phase boundary region
(2017-01-05)
Article
Open AccessA systematic study of the functional properties of the (1-x)(Bi0.5Na0.5)TiO3–xBaTiO3 (BNT-xBT) piezoceramic system for 0.05 = x = 0.07 is performed. The samples are obtained through the conventional solid-state route. The ... -
Enhancement of piezoelectric properties stability of submicron-structured piezoceramics obtained by spark plasma sintering
(Elsevier, 2018-06-19)
Article
Open AccessGrain-size effect on functional properties of piezoceramics is nowadays an important topic due to the potential applications of these materials at the submicron scale. In this context, we explore the effect of the grain ... -
Evidence of temperature dependent domain wall dynamics in hard lead zirconate titanate piezoceramics
(American Institute of Physics (AIP), 2012-07)
Article
Open AccessThis 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, ... -
Exploring different sintering atmospheres to reduce nonlinear response of modified KNN piezoceramics
(Elsevier, 2013-04)
Article
Restricted access - publisher's policyDense 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, ... -
Extensive domain wall contribution to strain in a (K,Na)NbO3-based lead-free piezoceramics quantified from high energy X-ray diffraction
(Elsevier, 2016-08)
Article
Open AccessThe 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 ... -
Flash sintering of high-performance lead-free (K,Na)NbO3-based piezoceramics: microstructure-properties relationship
(Universitat Politècnica de Catalunya, 2023-07-04)
Master thesis
Open AccessPiezoelectric materials are widely used as functional element of electromechanical trans- ducers in a large number of domestic and industrial applications. Because of their low cost and relatively easy fabrication, ... -
Flash sintering of potassium-sodium niobate-based piezoceramics: refining (micro)structure for properties enhancement
(Elsevier, 2024-08)
Article
Restricted access - publisher's policyLow-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 ... -
High stability of properties in morphotropic phase boundary Bi0.5Na0.5TiO3-BaTiO3 piezoceramics
(2016-11-15)
Article
Open AccessThe (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 ... -
Improving the functional properties of (K0.5Na0.5)NbO3 piezoceramics by acceptor doping
(Elsevier, 2015-01-01)
Article
Open AccessZrO2 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 ... -
Insights into the early size effects of lead-free piezoelectric Ba0.85Ca0.15Zr0.1Ti0.9O3
(John Wiley & sons, 2023-11-15)
Article
Open AccessBa0.85Ca0.15Zr0.1Ti0.9O3 (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
(2012)
Article
Restricted access - publisher's policyDielectric 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 ... -
Preisach modeling of temperature-dependent ferroelectric response of piezoceramics at sub-switching regime
(2016-04)
Article
Open AccessThe 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 ... -
Preisach modelling of nonlinear response in electrically biased lead zirconate titanate-based piezoceramics
(2013-09)
Article
Open AccessThe 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 ... -
Proyecto de diseño de un sistema de baldosas piezoeléctricas en un gran centro comercial
(Universitat Politècnica de Catalunya, 2022-05-17)
Bachelor thesis
Open AccessAnte la actual crisis energética que vive la sociedad debida entre otros motivos a la limitación de los recursos naturales, se propone una alternativa limpia y sostenible como es la piezoelectricidad para abastecer ... -
Understanding the piezoelectric properties in potassium-sodium niobate-based lead-free piezoceramics: interrelationship between intrinsic and extrinsic factors
(Elsevier, 2017-09)
Article
Open AccessLead 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 ...
