Low-temperature synthesis of BiFeO3 nanopowders via a sol–gel method
Low-temperature synthesis of BiFeO3 nanopowders via a sol–gel method
复制标题
DOI：
10.1016/j.jallcom.2008.04.090
复制
发表时间：
2009-03
影响因子：
6.2
通讯作者：
Jiahuan Xu;H. Ke;D. Jia;Wen Wang;Yu Zhou
中科院分区：
文献类型：
--
作者：
Jiahuan Xu;H. Ke;D. Jia;Wen Wang;Yu Zhou
采用溶胶-凝胶法在450°C下合成了BiFeO 3纳米粉体。通过乙二醇的辅助作用，控制混合离子的浓度，得到透明、均匀的溶胶。BiFeO 3晶体的制备过程可分为三个阶段：（i）200°C以下有机物的蒸发和含氮有机物的分解;（ii）200-300°C范围内Bi-Fe凝胶网络的坍塌;（iii）Bi 2CO 3 O2和Fe 2 O3之间的固相反应形成BiFeO 3纳米粉体。
Bismuth ferrite (BiFeO3) nanopowders were synthesized by a sol–gel method at the temperature as low as 450°C. The obtained sol was transparent and homogenous when the mixture ionic concentration was properly controlled with the help of ethylene alcohol. The preparation process of crystalline BiFeO3could be divided into three stages: (i) the evaporation of organics and decomposition of nitrogen-containing organics below 200°C; (ii) the collapse of Bi–Fe gel network in the temperature range of 200–300°C and (iii) the formation of BiFeO3nanopowders by the solid-state reaction between Bi2CO3O2and Fe2O3.