TY - JOUR
T1 - Effect of titanium dioxide solubility on the formation of BaTiO3 nanoparticles in supercritical water
AU - Atashfaraz, Mehrnoosh
AU - Shariaty-Niassar, Mojtaba
AU - Ohara, Satoshi
AU - Minami, Kimitaka
AU - Umetsu, Mitsuo
AU - Naka, Takashi
AU - Adschiri, Tadafumi
PY - 2007/8/25
Y1 - 2007/8/25
N2 - Fine BaTiO3 nanoparticles were prepared by hydrothermal synthesis under supercritical condition (400 °C and 30 MPa) from mixture of barium hydroxide and titanium dioxide as starting precursors. First, conditions for synthesizing BaTiO3 were examined by using batch reactors. High pH condition, pH > 13, is necessary to obtain phase pure BaTiO3. The reason was discussed based on the solubility of titanium dioxide, which that dissolution-recrystallization process is essential for the synthesis of BaTiO3 nanoparticles. Rapid heating of the starting precursors by mixing with high temperature water in a flow reactor is effective to synthesize smaller size and narrower particle size distribution for the BaTiO3 nanoparticles, compared with the case of slow heating with a batch reactor.
AB - Fine BaTiO3 nanoparticles were prepared by hydrothermal synthesis under supercritical condition (400 °C and 30 MPa) from mixture of barium hydroxide and titanium dioxide as starting precursors. First, conditions for synthesizing BaTiO3 were examined by using batch reactors. High pH condition, pH > 13, is necessary to obtain phase pure BaTiO3. The reason was discussed based on the solubility of titanium dioxide, which that dissolution-recrystallization process is essential for the synthesis of BaTiO3 nanoparticles. Rapid heating of the starting precursors by mixing with high temperature water in a flow reactor is effective to synthesize smaller size and narrower particle size distribution for the BaTiO3 nanoparticles, compared with the case of slow heating with a batch reactor.
KW - BaTiO nanoparticles
KW - Formation mechanism
KW - Solubility
KW - Supercritical water
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U2 - 10.1016/j.fluid.2007.03.025
DO - 10.1016/j.fluid.2007.03.025
M3 - Article
AN - SCOPUS:34250772393
VL - 257
SP - 233
EP - 237
JO - Fluid Phase Equilibria
JF - Fluid Phase Equilibria
SN - 0378-3812
IS - 2
ER -