Dispersing and doping of BaTiO3 powder by adsorption

Taolong Su

doi:10.1007/s11595-007-5644-7

Journal of Wuhan University of Technology Materials Science Edition ›› 2008, Vol. 23 ›› Issue (5) : 644 -646. DOI: 10.1007/s11595-007-5644-7

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Dispersing and doping of BaTiO₃ powder by adsorption

Taolong Su ¹^,^{^{^a}}

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Abstract

Dispersing and doping of BaTiO₃ powder by adsorption method were investigated. Ultrafine BaTiO₃ powders were dispersed in the aqueous with ammoniumized citrate (NH₄-CA) or ammoniumized citric lanthanum chelate (NH₄-La-CA) as dispersant by ultrasonic bath. Better dispersion of BaTiO₃ slurry was obtained in the aqueous with NH₄-La-CA than that of NH₄-CA when the mass ratio of citric acid (CA) to BaTiO₃ was less than 0.007. The pH value hardly affects the dispersion property of BaTiO₃ suspension dispersed by NH₄-La-CA. BaTiO₃ powder could be well dispersed (median size D ₅₀=0.45 μm) and also doped with high uniformity of added components by adsorbing citric acid chelate on surface. Compared with solid mixing, better microstructure and properties of La/Mn codoped ceramics were obtained by adsorption method.

Keywords

BaTiO₃ / adsorption / dispersion / doping

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Taolong Su. Dispersing and doping of BaTiO₃ powder by adsorption. Journal of Wuhan University of Technology Materials Science Edition, 2008, 23(5): 644-646 DOI:10.1007/s11595-007-5644-7

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