Details

Autor(en) / Beteiligte

• Jung, D.S.
• Hong, S.K.
• Cho, J.S.
• Kang, Y.C.

Titel

Nano-sized barium titanate powders with tetragonal crystal structure prepared by flame spray pyrolysis

Ist Teil von

• Journal of the European Ceramic Society, 2008, Vol.28 (1), p.109-115

Ort / Verlag

Oxford: Elsevier Ltd

Erscheinungsjahr

2008

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Nano-sized BaTiO 3 powders with regular morphology and tetragonal crystal structure were prepared by flame spray pyrolysis from a spray solution with citric acid. The precursor powders prepared at the low flow rates of fuel gas at 2 and 2.5 L/min had large, hollow, thin wall structures. On the other hand, the precursor powders prepared at a high flow rate of fuel gas at 4 L/min had a dense submicronic structure. Those precursor powders with a hollow, thin wall structure formed a slightly aggregated BaTiO 3 of nanometer-sized primary powders after post-treatment. The slightly aggregated BaTiO 3 became nano-sized powders via a simple milling process. The mean sizes of the powders changed from several tens to 200 nm when post-treatment temperatures changed from 700 to 1000 °C. The BaTiO 3 powders obtained from the citric acid spray solution had tetragonal crystal structure at post-treatment temperature of 1000 °C. Conversely, those BaTiO 3 powders prepared from a spray solution that did not contain citric acid had cubic crystal structures at this same post-treatment temperature.