Journal Article

PreJuSER-15643

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Nanocomposite thin films for miniaturized multi-ayer ceramic capacitors prepared from barium titanate nanoparticle based hybrid solutions

Schneller, T.FZJ* ; Halder, S. ; Waser, R.FZJ* ; Pithan, C.FZJ* ; Dornseiffer, J.FZJ* ; Shiratori, Y.FZJ* ; Houben, L.FZJ* ; Vyshnavi, N. ; Majumber, S. B.

2011
ChemSoc London

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Please use a persistent id in citations: http://hdl.handle.net/2128/7299  doi:10.1039/C1JM10607D

Abstract: In the present work a flexible approach for the wet chemical processing of nanocomposite functional thin films is demonstrated. Barium titanate (BTO) based nanocomposite thin films for future miniaturized multi-layer ceramic capacitors are chosen as model systems to introduce the concept of "hybrid solutions" which consist of stabile mixtures of reverse micelle derived BTO nanoparticle dispersions and conventional molecular precursor solutions of either the same (BTO:BTO) or a specifically different material such as zirconia (BTO:ZrO2). While in the case of using BTO:BTO hybrid solutions an interesting mode of microstructure control is found, the use of BTO:ZrO2 hybrid solutions with various BTO : ZrO2 ratios leads to nanocomposite films. BTO:BTO hybrid solutions yield columnar grown films with excellent permittivities up to 1050 with a significantly reduced number of coating steps at 700 degrees C. Low values of the temperature coefficient of capacitance are realized in the BTO-ZrO2 nanocomposite thin films. The observed dielectric behavior of these films is explained based on the formation of a core-shell type microstructure on the nanoscale. A detailed high resolution transmission electron microscopy study combined with Raman spectroscopy and X-ray diffraction gives evidence for the proposed BTO-ZrO2 nanocomposite character of these thin films.

Keyword(s): J

Note: The research described in this publication was supported by the Deutsche Forschungsgemeinschaft within the priority program SPP1181. S. B. Majumder wishes to thank Alexander von Humboldt foundation for the partial financial support to carry out the research work and N. Vyshnavi acknowledges the financial support rendered by the DAAD sandwich Fellowship. Thomas Possinger is acknowledged for preparing the artwork.

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Contributing Institute(s):

1. Elektronische Materialien (PGI-7)
2. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)
3. Troposphäre (IEK-8)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)
2. Atmosphäre und Klima (P23)

Appears in the scientific report 2011

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