TY - JOUR
T1 - Hydrothermal synthesis of lead titanate from complexed precursor solutions
AU - Gelabert, M. C.
AU - Gersten, B. L.
AU - Riman, R. E.
N1 - Funding Information: M.C.G. would like to thank the late Robert A. Laudise for kindly expressing openness and skepticism to the work in progress. The financial support of ONR and DARPA is gratefully acknowledged.
PY - 2000/4/1
Y1 - 2000/4/1
N2 - Lead titanate was synthesized at 200°C from chelated titanium and lead in alkaline, aqueous solution. Complexing agents included H2O2 and EDTA, with KOH and KF as mineralizers. After synthesis in hydrothermal autoclaves, the products were examined by field emission scanning electron microscopy (FESEM) and powder X-ray diffraction. Samples prepared with low Ti (< 8 mmolal) and high KOH (> 1.2 m) concentrations were found to contain dendritic powder combined with a small fraction of square platelets varying in size from 50-200 μm. X-ray diffraction confirmed that the yellow powders were single-phase, tetragonal PbTiO3. The conditions under which these platelets were formed (200°C, 200 psi) are mild compared to conventional hydrothermal routes, which require > 500°C and > 10000 psi to grow crystals of comparable size.
AB - Lead titanate was synthesized at 200°C from chelated titanium and lead in alkaline, aqueous solution. Complexing agents included H2O2 and EDTA, with KOH and KF as mineralizers. After synthesis in hydrothermal autoclaves, the products were examined by field emission scanning electron microscopy (FESEM) and powder X-ray diffraction. Samples prepared with low Ti (< 8 mmolal) and high KOH (> 1.2 m) concentrations were found to contain dendritic powder combined with a small fraction of square platelets varying in size from 50-200 μm. X-ray diffraction confirmed that the yellow powders were single-phase, tetragonal PbTiO3. The conditions under which these platelets were formed (200°C, 200 psi) are mild compared to conventional hydrothermal routes, which require > 500°C and > 10000 psi to grow crystals of comparable size.
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U2 - https://doi.org/10.1016/S0022-0248(99)00781-2
DO - https://doi.org/10.1016/S0022-0248(99)00781-2
M3 - Conference article
VL - 211
SP - 497
EP - 500
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
SN - 0022-0248
IS - 1
T2 - The 11th American Conference on Crystal Growth and Epitaxy
Y2 - 1 August 1999 through 6 August 1999
ER -