2013 Volume 38 Issue 1 Pages 53-55
Fine particles of BiFeO3 were prepared from bismuth nitrate and iron nitrate in KOH solution by hydrothermal reaction. A single phase of BiFeO3 was prepared under hydrothermal condition of K/Bi ≥ 120 and above 180 °C. The TG curves of single phase of BiFeO3 indicated that the products included a small amount of OH group or water in spite of no detection of potassium atom by EDX. The particle size of BiFeO3 was ～ 10 μm and 10 ～ 20 μm for the products at 180 and 220 °C, respectively. The particle prepared at 220 °C was formed by aggregation of ～ 10 nm size particles with a cubic shape. From the pH dependence of ζ-potential the isoelectric point was about three.
