Synthesis and characterization of barium strontium titanate nano powders by low temperature ambient pressure sol process
authors Wu, AY; Vilarinho, PM; Gonzalez, M
nationality International
journal JOURNAL OF NANOPARTICLE RESEARCH
author keywords Nanoparticles; Barium strontium titanate; Sol processing; pH; Temperature; Nucleation
keywords LARGE-SCALE SYNTHESIS; HYDROTHERMAL SYNTHESIS; PARTICLE-SIZE; DIELECTRIC-PROPERTIES; BATIO3; PHASE; MORPHOLOGY; SRTIO3
abstract Crystalline (Ba (x) Sr(1-x) TiO(3)) (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) Sr(1-x) TiO(3)) powders is assessed. Amorphous powders are obtained at temperatures lower than 90 A degrees C and crystalline, stoichiometric and monophasic Ba (x) Sr(1-x) TiO(3) (x = 0, 0.5, 0.8 and 1), powders are synthesized at 95 A degrees 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.
publisher SPRINGER
issn 1388-0764
year published 2010
volume 12
issue 6
beginning page 2221
ending page 2231
digital object identifier (doi) 10.1007/s11051-009-9788-6
web of science category Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Chemistry; Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000280240600027
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