Abstract
Nano-sized Ba1−xLa x TiO3 (0 ≤ x ≤ 0.03) powders were prepared by ultrasonic spray pyrolysis from the spray solution with citric acid. The mean sizes of the primary particles decreased from 110 nm to 59 nm when the x of the Ba1−xLaxTiO3 powders was changed from 0 to 0.03. The BET surface areas of the powders changed from 9.1 m2/g to 16.9 m2/g. The pure BaTiO3 and La-doped BaTiO3 powders had both tetragonal and cubic crystal structures. The average grain size of the sintered BaTiO3 specimen was 2.8 µm, while those of the La-doped BaTiO3 pellets ranged from 1.04 µm to 0.68 µm according to the doping concentrations of La. The dielectric constant of Ba1−xLaxTiO3 (0.01 ≤ x ≤ 0.03) pellets ranged from 2500 to 3855 when sintered at 1280 °C.
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Jung, D.S., Koo, H.Y., Jang, H.C. et al. Effects of La content on the properties of Ba1−xLaxTiO3 powders prepared by spray pyrolysis. Met. Mater. Int. 15, 809–814 (2009). https://doi.org/10.1007/s12540-009-0809-2
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DOI: https://doi.org/10.1007/s12540-009-0809-2