BiFeO3 synthesis by conventional solid-state reaction
A. Tuluk (TU Delft - Novel Aerospace Materials)
T.R. Mahon (TU Delft - Novel Aerospace Materials)
S. van der Zwaag (TU Delft - Novel Aerospace Materials)
W.A. Groen (TU Delft - Aerospace Structures & Materials)
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Abstract
BiFeO3 is a multiferroic material with the perovskite structure which is promising for use in sensors and transducers. Single phase production of BiFeO3 remains a challenge, however. In this study, the optimal calcination temperature to obtain close to single phase powder was determined to be 750°C. The sintering temperature of 775°C was also found to obtain high density ceramics (≈ 95 % of theoretical density). It is shown that off-stoichiometry of bismuth oxide in precursors effects the content of secondary phase. Impedance spectroscopy indicates that the content of secondary phases has a large effect on the electrical conductivity BiFeO3.