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Hydrothermal Soft Chemical Synthesis and Particle Morphology Control of BaTiO 3 in Surfactant Solutions
Author(s) -
Feng Qi,
Hirasawa Manabu,
Kajiyoshi Koji,
Yanagisawa Kazumichi
Publication year - 2005
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.1551-2916.2005.00298.x
Subject(s) - hydrothermal circulation , chemical engineering , materials science , titanate , barium titanate , lepidocrocite , anatase , hydrothermal synthesis , morphology (biology) , particle (ecology) , mineralogy , chemical reaction , inorganic chemistry , ceramic , chemistry , composite material , catalysis , geology , organic chemistry , photocatalysis , paleontology , oceanography , adsorption , engineering , goethite
Barium titanate (BaTiO 3 ) particles with book‐like and spherical morphology were prepared by using a hydrothermal soft chemical process in the presence of a cationic surfactant. A layered titanate of H 1.07 Ti 1.73 O 4 with a lepidocrocite‐like structure and plate‐like particle morphology was used as the precursor. The layered titanate was hydrothermally treated in a Ba(OH) 2 –(HTMA‐OH) ( n ‐hexadecyltrimethylammonium hydroxide) solution or a Ba(OH) 2 –(HTMA‐Br) ( n ‐hexadecyltrimethylammonium bromide) solution in a temperature range of 80°–250°C to prepare BaTiO 3 . The intercalation reaction of HTMA + with the layered titanate promotes the structural transformation reaction from the layered titanates to BaTiO 3 , while it inhibits the structural transformation reaction to anatase under the hydrothermal conditions. The particle morphology of BaTiO 3 prepared by this method dramatically changes with changing reaction conditions. HTMA + plays an important role in changing particle morphology in the hydrothermal soft chemical process.