Now showing items 1-9 of 9

  • A model to explain the TSDC spectrum of XLPE insulation in mid voltage cables based on a virtual electrode 

    Belana Punseti, Juan; Diego Vives, José Antonio; Orrit Prat, Jordi; Mudarra López, Miguel (2007)
    Conference lecture
    Open Access
    The analysis by TSDC of a large variety of cables subjected to long annealing times, has resulted in spectra that sometimes show an oscillation of the current peak observed at 99°C. This process has been observed in some ...
  • Confección y gestión automática de exámenes tipo test 

    Cañadas Lorenzo, Juan Carlos; Diego Vives, José Antonio; Pelayo Melero, Ignacio Manuel (Universidad de Cádiz, 2016)
    Conference lecture
    Restricted access - publisher's policy
    El presente trabajo describe la implementación de una aplicación informática como recurso docente, diseñada como plataforma para la elaboración, utilización y corrección de controles formativos y exámenes de evaluación. ...
  • Effect of humidity in charge formation and transport in LDPE 

    Aragoneses Aguado, Andrés; Tamayo, Ildaberto; Lebrato, Alexander; Cañadas Lorenzo, Juan Carlos; Diego Vives, José Antonio; Arencón Osuna, David; Belana Punseti, Juan (2013-04-02)
    Article
    Restricted access - publisher's policy
  • Effects of UV radiation on the charge trapping capability of PET 

    Cañadas Lorenzo, Juan Carlos; Diego Vives, José Antonio; Mudarra López, Miguel; Parsa, Seyedeh Elaheh; Sellarès González, Jordi (Institute of Physics (IOP), 2019-02-06)
    Article
    Restricted access - publisher's policy
    Poly(ethylene terephthalate) (PET) is able to retain space charge in traps, as is usual in dielectric materials. This allows the material to attain an almost permanent polarization when space charge is displaced by an ...
  • Influence of internal flexibility on the double glass transition in a series of odd non-symmetric liquid crystal dimers characterised by dielectric measurements 

    Diego Vives, José Antonio; Sellarès González, Jordi; Díez Berart, Sergio; Salud Puig, Josep; Cañadas Lorenzo, Juan Carlos; Mudarra López, Miguel; López Pérez, David Orencio; de la Fuente Lavin, Maria Rosario; Ros, M Blanca (2017-04-11)
    Article
    Open Access
    Dielectric measurements (thermally stimulated depolarisation currents and broadband dielectric spectroscopy) have been performed near the glass transition to study the glass transition on the odd non-symmetric liquid crystal ...
  • Space charge measurements in XLPE insulated mid-voltage cable: correlation with cable performance 

    Tamayo Ávila, Idalberto; Orrit Prat, Jordi; Diego Vives, José Antonio (2007)
    Conference lecture
    Restricted access - publisher's policy
    Three experimental midvoltage XLPE cables, C2, C3 and C4, rated respectively as 'good', 'very good' and 'bad' in perforation tests, are studied. All these cables have been systematically measured by PEA as produced and ...
  • Study of dispersive mobility in polyimide by surface voltage decay measurements 

    Aragoneses Aguado, Andrés; Mudarra López, Miguel; Belana Punseti, Juan; Diego Vives, José Antonio (ELSEVIER PUBLISHER, 2008-05)
    Article
    Open Access
    In order to study charge trapping and transport in polyimide, we have submitted samples of Kapton HN to corona charging and measured its surface potential decay with an electrostatic voltmeter. We propose a two terms ...
  • Sublinear dispersive conductivity in polyetherimides by the electric modulus formalism 

    Mudarra López, Miguel; Sellarès González, Jordi; Cañadas Lorenzo, Juan Carlos; Diego Vives, José Antonio (2015-12)
    Article
    Open Access
    Two commercially available polyetherimides, Ultem 1000 and Ultem 5000, have been studied by means of Dynamic Electrical Analysis. Results show that at temperatures above the glass transition dielectric response is highly ...
  • Two glass transitions associated to different dynamic disorders in the nematic glassy state of a non-symmetric liquid crystal dimer dopped with gamma-alumina nanoparticles 

    Díez Berart, Sergio; López Pérez, David Orencio; Salud Puig, Josep; Diego Vives, José Antonio; Sellarès González, Jordi; Robles Hernández, Beatriz; De la Fuente, Maria Rosario; Blanca Ros, María (2015-06-01)
    Article
    Open Access
    In the present work, the nematic glassy state of the non-symmetric LC dimer -(4-cyanobiphenyl-4-yloxy)--(1-pyrenimine-benzylidene-4-oxy) undecane is studied by means of calorimetric and dielectric measurements. The most ...