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Dielectric Properties of Fine Grains Barium Titanate Ceramics Prepared by Mechanochemical Synthesis

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7 Author(s)
Miclea, C. ; National Inst. for Mater. Phys., Bucharest-Magurele ; Tanasoiu, C. ; Spanulescu, I. ; Miclea, C.F.
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Barium titanate was prepared by the advanced procedure of mechanochemical synthesis from barium and titanium oxides after 50 hours of milling. The X-ray examination of the milled powders showed the phase evolution during synthesis and the perovskite phase was initiated after 5 hours and was completed after 50 hours. Sintered samples from these nanopowders show different dielectric properties for fine and coarse grained ceramics. Samples with an average grain size of 2 mum showed the highest dielectric constant of 5800 at room temperature. A sharp maximum of the dielectric constant with values of about 16000 was recorded at the Curie temperature

Published in:

International Semiconductor Conference, 2006  (Volume:2 )

Date of Conference:

27-29 Sept. 2006

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