Journal Article

PreJuSER-15642

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Spark plasma sintering of nanocrystalline BaTiO3-powders: Consolidation behavior and dielectric characteristics

Yoon, S.FZJ* ; Dornseiffer, J.FZJ* ; Xing, Y. ; Grüner, D. ; Shen, Z. ; Iwaya, S. ; Pithan, C.FZJ* ; Waser, R.FZJ*

2011
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.jeurceramsoc.2011.03.035

Abstract: BaTiO3 nanopowders prepared by two different wet chemical routes, one based on microemulsion-mediated synthesis (M-BT) and the other one on the alkoxide-hydroxide method (A-BT) were consolidated by spark plasma sintering (SPS). The densification process, the linear shrinkage rates and the relative densities achieved were strongly dependant on the synthetic route. The results show that fully densified BaTiO3 ceramics with a grain size of about 200 nm can be obtained in both cases by controlling the sintering temperature during the SPS process. The study of dielectric properties revealed that M-BT derived ceramics show higher permittivity values compared to those obtained for A-BT. The influence of the barium/titanium ratio on the sintering behavior and the dielectric properties is discussed. (C) 2011 Elsevier Ltd. All rights reserved.

Keyword(s): J ; BaTiO3 (auto) ; Spark plasma sintering (auto) ; Grain growth (auto) ; Dielectric properties (auto)

Note: This work was supported by the Korea Research Foundation Grant funded by the Korean Government (KRF-2007-D00124). S. Yoon acknowledges support from COST Action 539 (COST-STSM-539-03589) of the European Union. NAMICS Corporation, Niigata (Japan) is gratefully acknowledged for financial support within a common collaboration project. The authors are grateful to Dr. Wessel Egbert for FE-SEM and to Dr. Detlev Hennings for helpful discussion and comments.

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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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