Powder and Dielectric Characterization of Hydrothermally Synthesized Barium Titanate Nanopowders

Abstract:

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.

• Periodical: Key Engineering Materials (Volume 320)
• Pages: 143-146
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.320.143
• Online since: September 2006
• Authors: Kouji Tokita, Shigeki Sato
• Keywords: Barium Titanate (BT), Capacitor, Hydrothermal, Multilayer Ceramic Capacitor (MLCC)

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DOI: 10.1143/jjap.42.6188

[4] K. Tokita and S. Sato, Key Engineering Materials, 301 (2006), p.219. Corresponding author: Kouji Tokita (e-mail: ktokita@mb1. tdk. co. jp).