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A coprecipitation/hydrothermal route was utilized to fabricate pure phase BiFeO 3 powders using FeCl3·6H2O and Bi(NO 3 ) 3·5H 2 O as starting materials,ammonia as precipitant and NaOH as mineralizer. The synthesized powders were characterized by XRD,SEM and DSC-TG analysis.In the process,single-phase BiFeO 3 powders could be obtained at a hydrothermal reaction temperature of 180℃,with NaOH of 0.15 mol/L, in contrast to 200℃and 4 mol/L for conventional hydrothermal route.Meanwhile,the micro-morphology of synthesized BiFeO 3 powders changed with different reaction temperatures and concentrations of NaOH.The Néel temperature,Curie temperature and decomposition temperature of the synthesized BiFeO 3 powders were detected to be 301℃,828℃ and 964℃,respectively.The hydrothermal reactions mechanism to fabricate BiFeO 3 powders were discussed based on the in-situ transformation process.
A coprecipitation / hydrothermal route was utilized to fabricate pure phase BiFeO 3 powders using FeCl 3 · 6H 2 O and Bi (NO 3) 3 · 5H 2 O as starting materials, ammonia as precipitant and NaOH as mineralizer. The resulting powders were characterized by XRD, SEM and DSC-TG analysis.In the process, single-phase BiFeO 3 powders could be obtained at a hydrothermal reaction temperature of 180 ° C with NaOH of 0.15 mol / L in contrast to 200 ° C and 4 mol / L for conventional hydrothermal route .Meanwhile, the micro-morphology of synthesized BiFeO 3 powders changed with different reaction temperatures and concentrations of NaOH. The Néel temperature, Curie temperature and decomposition temperature of the synthesized BiFeO 3 powders were detected to be 301 ° C., 828 ° C. and 964 ° C., respectively. hydrothermal reactions mechanism to fabricate BiFeO 3 powders were discussed based on the in-situ transformation process.