Low temperature sintering of barium titanate ceramics assisted by addition of lithium fluoride-containing sintering additives

By addition of LiF-containing sintering additives to commercial BaTiO 3 powder, more than 98% of the theoretical density was reached at a sintering temperature of 900 °C both on powder compacts and laminates. Dielectric measurements were performed on ceramic samples in the temperature and frequency...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2010, Vol.30 (1), p.81-86
Main Authors: Naghib-zadeh, Hamid, Glitzky, Carsten, Dörfel, Ilona, Rabe, Torsten
Format: Article
Language:English
Subjects:
BaTiO 3
Capacitors
LiF
LTCC
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Summary:By addition of LiF-containing sintering additives to commercial BaTiO 3 powder, more than 98% of the theoretical density was reached at a sintering temperature of 900 °C both on powder compacts and laminates. Dielectric measurements were performed on ceramic samples in the temperature and frequency ranges from −20 °C to 125 °C and from 10 3 to 10 6 Hz, respectively. High relative permittivity ( ɛ r ∼ 3160) and low dielectric loss (tan δ ∼ 0.014) were measured for tapes of the favoured material. The breakdown strength for tapes with a thickness of about 80 μm is 30 kV/mm. The microprobe analysis showed, that no interfacial reaction between the dielectric layer and the Ag-electrode had occurred. The newly developed barium titanate ceramics completely densifying at 900 °C turned out to be promising for integration of buried capacitors in LTCC multilayers.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2009.07.005