TY - JOUR
T1 - Hydrothermal synthesis of lead doped barium titanate
AU - Vold, R. E.
AU - Biederman, R.
AU - Rossetti, G. A.
AU - Sacco, A.
AU - Sjodin, T.
AU - Rzhevskii, A.
N1 - Funding Information:
We would like to thank National Aeronautics and Space Administration (NASA) for the support of this study. In particular we would like to acknowledge the Space Products Division (SPD). T. S. acknowledges the support of Professor P. M. Champion through grants from National Science Foundation (MCB 9904516) and National Institutes of Health (AM 35090).
PY - 2001/4/15
Y1 - 2001/4/15
N2 - Lead doped barium titanate was synthesized hydrothermally at 363 K for 140 h. A molar formula of Ba(1-x)PbxTiO3 was used, where x ranged between 0.025 and 0.75. The crystal structure, phase purity, and particle morphology was investigated by x-ray diffraction, Raman spectroscopy and electron microscopy. Under the synthesis conditions used, lead (Pb2+) was shown to incorporate into the perovskite structure when the dopant was kept below 20%. Above 20% Pb, other phases appeared and at 75% Pb no reaction to the perovskite structure took place. Unexpectedly, barium titanate containing from 2.5% Pb to 10% Pb appeared to be of orthorhombic symmetry. This was concluded by total pattern fitting of x-ray diffraction profiles and from splitting of the 222 reflection. The factors controlling the tendency for these materials to adopt orthorhombic symmetry as opposed to the more commonly observed tetragonal or cubic symmetries are briefly discussed.
AB - Lead doped barium titanate was synthesized hydrothermally at 363 K for 140 h. A molar formula of Ba(1-x)PbxTiO3 was used, where x ranged between 0.025 and 0.75. The crystal structure, phase purity, and particle morphology was investigated by x-ray diffraction, Raman spectroscopy and electron microscopy. Under the synthesis conditions used, lead (Pb2+) was shown to incorporate into the perovskite structure when the dopant was kept below 20%. Above 20% Pb, other phases appeared and at 75% Pb no reaction to the perovskite structure took place. Unexpectedly, barium titanate containing from 2.5% Pb to 10% Pb appeared to be of orthorhombic symmetry. This was concluded by total pattern fitting of x-ray diffraction profiles and from splitting of the 222 reflection. The factors controlling the tendency for these materials to adopt orthorhombic symmetry as opposed to the more commonly observed tetragonal or cubic symmetries are briefly discussed.
UR - http://www.scopus.com/inward/record.url?scp=0035870734&partnerID=8YFLogxK
U2 - 10.1023/A:1017582915853
DO - 10.1023/A:1017582915853
M3 - Article
AN - SCOPUS:0035870734
SN - 0022-2461
VL - 36
SP - 2019
EP - 2026
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 8
ER -