Descripción
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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. | |
Internacional
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No |
Nombre congreso
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XI REUNIÓN NACIONAL DE LECTROCERÁMICA |
Tipo de participación
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960 |
Lugar del congreso
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ZARAGOZA |
Revisores
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Si |
ISBN o ISSN
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0000-0000 |
DOI
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Fecha inicio congreso
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19/06/2013 |
Fecha fin congreso
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21/06/2014 |
Desde la página
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41 |
Hasta la página
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41 |
Título de las actas
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XI REUNIÓN NACIONAL DE LECTROCERÁMICA |