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Hydrothermal Synthesis of Perovskite BiFeO 3 –BaTiO 3 Crystallites
Author(s) -
Qin Hongbin,
Zhang Hailong,
Zhang BoPing,
Xu Lihua
Publication year - 2011
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.1551-2916.2011.04839.x
Subject(s) - materials science , crystallite , hydrothermal circulation , ferroelectricity , perovskite (structure) , dissolution , chemical engineering , crystallization , phase (matter) , polarization (electrochemistry) , mineralogy , hydrothermal synthesis , bismuth ferrite , dielectric , multiferroics , metallurgy , optoelectronics , chemistry , organic chemistry , engineering
Hydrothermal method, which provides an effective approach to produce pure‐phase BiFeO 3 ‐based solid solution was used to synthesize BiFeO 3 –BaTiO 3 powders. The phase evolution was found to be connected with reaction temperature, initial KOH concentration, and duration time. The results show that perovskite cubic 0.5 BiFeO 3 –0.5 BaTiO 3 crystallites can be synthesized at a temperature as low as 200°C, with a KOH concentration of 4 M . It indicates that the hydrothermal reactions responsible for the formation of crystalline BiFeO 3 –BaTiO 3 are closely related to metal hydroxides dissolution and crystallization process. Field‐emission scanning electron microscopy observations revealed a homogeneous distribution of submicron‐sized BiFeO 3 –BaTiO 3 powders. Ferroelectricity was demonstrated for the BiFeO 3 –BaTiO 3 powders by polarization–electric field hysteresis loop measured with the corresponding bulk samples.