Nano Archive

Synthesis and characterization of barium strontium titanate nano powders by low temperature ambient pressure sol process

Wu, Aiying and Vilarinho, Paula M. and González, Mercedes (2010) Synthesis and characterization of barium strontium titanate nano powders by low temperature ambient pressure sol process. Journal of Nanoparticle Research, 12 (6). pp. 2221-2231.

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Abstract

Crystalline (Ba x Sr1−x TiO3) (x = 0, 0.5 0.8 and 1) nanosized powders is synthesized by an ambient pressure and low temperature sol process. The influence of Ba/Sr ratio, temperature, pH and reflux time on the phase formation and morphology of (Ba x Sr1−x TiO3) powders is assessed. Amorphous powders are obtained at temperatures lower than 90 °C and crystalline, stoichiometric and monophasic Ba x Sr1−x TiO3 (x = 0, 0.5, 0.8 and 1), powders are synthesized at 95 °C. Under identical preparation conditions, the powder particle size depends on the Ba/Sr ratio. High values of pH decrease the particle size. For reflux times lower than 2 h the particle size decreases with increasing of reflux time, reflecting the dominant role of the nucleation step. For reflux times higher than 2 h the growth step becomes dominant and the particle size increases with the increase of reflux time.

Item Type:Article
Uncontrolled Keywords:Nanoparticles - Barium strontium titanate - Sol processing - pH - Temperature - Nucleation
Subjects:Material Science > Nanofabrication processes and tools
ID Code:9448
Deposited By:SPI
Deposited On:02 Aug 2010 15:51
Last Modified:01 Sep 2010 11:08

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