Co-precipitation/Hydrothermal Synthesis of BiFeO_3 Powder  

作　　者：MIAO Hongyan ZHANG Qiong TAN Guoqiang ZHU Gangqiang 

机构地区：[1]School of Materials Science ＆ Engineering, Shaanxi University of Science ＆ Technology, Xi＇an 710021, China [2]School of Physics ＆ Information Technology, Shannxi Normal University, Xi＇an 710062, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2008年第4期507-509,共3页武汉理工大学学报（材料科学英文版）

基　　金：the National Natural Science Foundation of China(No.50372039)

摘　　要：A coprecipitation/hydrothermal route was utilized to fabricate pure phase BiFeO3 powders using FeCl3·6H2O and Bi（NO3）3·5H2O 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 BiFeO3 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 BiFeO3 powders changed with different reaction temperatures and concentrations of NaOH. The N6el temperature, Curie temperature and decomposition temperature of the synthesized BiFeO3 powders were detected to be 301 ℃, 828 ℃ and 964 ℃, respectively. The hydrothermal reactions mechanism to fabricate BiFeO3 powders were discussed based on the in-situ transformation process.A coprecipitation/hydrothermal route was utilized to fabricate pure phase BiFeO3 powders using FeCl3·6H2O and Bi（NO3）3·5H2O 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 BiFeO3 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 BiFeO3 powders changed with different reaction temperatures and concentrations of NaOH. The N6el temperature, Curie temperature and decomposition temperature of the synthesized BiFeO3 powders were detected to be 301 ℃, 828 ℃ and 964 ℃, respectively. The hydrothermal reactions mechanism to fabricate BiFeO3 powders were discussed based on the in-situ transformation process.

关 键 词：CO-PRECIPITATION hydrothermal synthesis bismuth ferrite powders MULTIFERROICS 

分 类 号：O652.61[理学—分析化学]