Powder and Dielectric Characterization of Hydrothermally Synthesized Barium Titanate Nanopowders

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Barium titanate (BaTiO3) particles with average size of smaller than 100 nm were synthesized by a hydrothermal process at 100°C to 300°C. The c- to a-axis ratios of the particles increased as the synthesis temperature increased. Disk capacitors were fabricated with as-synthesized particles and some additives to obtain X7R capacitors. The temperature coefficient of capacitance with particles synthesized at 100°C was much larger than that for 300°C, indicating that the former had uniform composition in the grain while the latter had a core-shell structure. This data show that barium titanate particles hydrothermally synthesized at high temperature are useful when creating the X7R capacitors with small grain size.

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Periodical:

Edited by:

Keiichi Katayama, Kazumi Kato, Tadashi Takenaka, Masasuke Takata and Kazuo Shinozaki

Pages:

143-146

DOI:

10.4028/www.scientific.net/KEM.320.143

Citation:

K. Tokita and S. Sato, "Powder and Dielectric Characterization of Hydrothermally Synthesized Barium Titanate Nanopowders ", Key Engineering Materials, Vol. 320, pp. 143-146, 2006

Online since:

September 2006

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$35.00

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