材料期刊网

The Fe-Cl boracite is prepared by a procedure, consisting of solution mixing, heating, grinding and H-2 reduction. The high valence metal ion Fe3+ reacts with H-2 to form the low valence metal ion Fe3+ so that the corresponding boracite can be synthesized. The lattice parameters and the phase transition temperatures are determined by means of X-ray diffraction, transmission electron microscopy and differential scanning calorimetry. The hydrogen not only plays a role in reduction, but also prevents the oxidation of the mixture. The ferroelectric property at room temperature of the sample has been substantially demonstrated. (C) 2001 Elsevier Science BY All rights reserved.