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.
|PDF - Published Version|
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.
|Uncontrolled Keywords:||Nanoparticles - Barium strontium titanate - Sol processing - pH - Temperature - Nucleation|
|Subjects:||Material Science > Nanofabrication processes and tools|
|Deposited On:||02 Aug 2010 15:51|
|Last Modified:||01 Sep 2010 11:08|
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