Memorias de investigación
Communications at congresses:
COMPORTAMIENTO ELÉCTRICO DE CERÁMICAS DÉBILMENTE CRISTALIZADAS CON BASE DE TeO2
Year:2013

Research Areas
  • Physics chemical and mathematical,
  • Engineering

Information
Abstract
A combined powder X-ray lattice parameter and ceramic impedance spectroscopy study is presented on materials within the CaO-CuO-TiO2 ternary phase diagram. Several compositions containing CaCu3Ti4O12 (CCTO) and small amounts of secondary phases such as TiO2, CaTiO3 and CuO are analysed and two different defect mechanisms are identified to cause non-stoichiometry in CCTO. The first mechanism involves variation in Cu content, which can explain the large differences in intrinsic bulk and extrinsic grain boundary (GB) resistance and the formation of the ceramic internal barrier layer capacitor (IBLC) structure. The second mechanism is associated with Ca-Cu anti-site disorder causing unusually high intrinsic bulk permittivity above that predicted from Clausius-Mossotti calculations.
International
No
Congress
XI REUNIÓN NACIONAL DE LECTROCERÁMICA
960
Place
ZARAGOZA
Reviewers
Si
ISBN/ISSN
0000-0000
Start Date
19/06/2013
End Date
21/06/2014
From page
41
To page
41
XI REUNIÓN NACIONAL DE LECTROCERÁMICA
Participants
  • Autor: Cintia Soledad Terny UPM
  • Autor: Miguel Ángel De La Rubia López UPM
  • Autor: ROBERTO E. ALONSO UNLP-ARGENTINA
  • Autor: MARISA FLECHERO UNLP-ARGENTINA
  • Autor: Jose de Frutos Vaquerizo UPM

Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Propiedades ópticas, eléctricas y magnéticas de materiales y sus aplicaciones (POEMMA)
  • Departamento: Física Aplicada a las Tecnologías de la Información