TY - JOUR
T1 - Formation mechanisms and morphological changes during the hydrothermal synthesis of BaTiO3 particles from a chemically modified, amorphous titanium (hydrous) oxide precursor
AU - Moon, Jooho
AU - Suvaci, Ender
AU - Morrone, Augusto
AU - Costantino, Stephen A.
AU - Adair, James H.
N1 - Funding Information:
The authors gratefully acknowledge the support of this work by Cabot Performance Materials Inc., Boyertown, PA. The authors would also like to thank the Major Analytical Instrumentation Center (MAIC) at the University of Florida for assistance in the characterization of materials.
PY - 2003/11
Y1 - 2003/11
N2 - The formation mechanism of BaTiO3 under hydrothermal conditions was investigated. A coprecipitated precursor prepared from chemically modified titanium isopropoxide with acetylacetone and barium acetate was used as a starting material. A solid-state kinetic analysis, supported by microstructural evidence, indicates that the formation mechanism of BaTiO3 in the current material system is dissolution and precipitation. The Ba-Ti complex gel dissolves into the aqueous soluble species, followed by direct precipitation from supersaturated solution. It is proposed that crystallization is controlled by dissolution of the hydrous Ti gel at the initial stage and then possibly by dissociation of the acetylacetonate group from the Ti solution species in which the acetylacetonate group is strongly bound to Ti.
AB - The formation mechanism of BaTiO3 under hydrothermal conditions was investigated. A coprecipitated precursor prepared from chemically modified titanium isopropoxide with acetylacetone and barium acetate was used as a starting material. A solid-state kinetic analysis, supported by microstructural evidence, indicates that the formation mechanism of BaTiO3 in the current material system is dissolution and precipitation. The Ba-Ti complex gel dissolves into the aqueous soluble species, followed by direct precipitation from supersaturated solution. It is proposed that crystallization is controlled by dissolution of the hydrous Ti gel at the initial stage and then possibly by dissociation of the acetylacetonate group from the Ti solution species in which the acetylacetonate group is strongly bound to Ti.
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U2 - 10.1016/S0955-2219(03)00016-5
DO - 10.1016/S0955-2219(03)00016-5
M3 - Article
AN - SCOPUS:0038605865
SN - 0955-2219
VL - 23
SP - 2153
EP - 2161
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 12
ER -