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Hydrothermal Synthesis of Spherical Perovskite Oxide Powders Using Spherical Gel Powders
Author(s) -
Choi Jae Young,
Kim Chong Hee,
Kim Do Kyung
Publication year - 1998
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1998.tb02490.x
Subject(s) - materials science , sol gel , hydrolysis , perovskite (structure) , chemical engineering , ammonium hydroxide , oxide , hydrothermal circulation , hydroxide , inorganic chemistry , mineralogy , chemistry , metallurgy , nanotechnology , organic chemistry , engineering
Spherical perovskite oxide powders, composed of fine particulates, were prepared by using spherical gel powders under hydrothermal conditions. Spherical PbTiO 3 , BaTiO 3 , and SrTiO 3 powders were synthesized from spherical TiO 2 gel powders, and spherical PbZrO 3 powder from spherical ZrO 2 gel powder. Spherical Pb(Zr 0.5 , Ti 0.5 )O 3 and Ba(Zr 0.5 ,Ti 0.5 )O 3 powders were prepared from spherical ZrTiO 4 gel powders. Lead acetate trihydrate, barium hydroxide octahydrate, and strontium hydroxide octahydrate were used as the sources of A‐site ions in each perovskite oxide (ABO 3 ). The spherical TiO 2 and ZrO 2 gel powders were prepared by thermal hydrolysis of titanium tetrachloride and zirconium oxychloride, respectively, and spherical ZrTiO 4 gel powder by thermal hydrolysis of a mixture of them in alcohol‐water mixed solvent. During the hydrothermal treatment, the spherical gel powders retained their spherical shape to produce spherical perovskite oxide powders, composed of nanometer‐sized particulates.