Diffuse phase transition in Na2Pb2R2W2Ti4V4O30 (R = Gd, Eu) ferroelectric ceramics

作者：Das Piyush R; Choudhary R N P^*; Samantray B K

来源：Journal of Physics and Chemistry of Solids, 2007, 68(4): 516-522.

DOI：10.1016/j.jpcs.2007.01.015

• electronic materials
• oxides
• X-ray diffraction
• ferroelectricity
• phase transition

The new complex polycrystalline samples of NaPb2R2W2Ti4V4O30 (R = Gd, Eu) were prepared by a low temperature (similar to 700 degrees C) solid-state reaction technique. Preliminary X-ray diffraction (XRD) studies of the compounds showed the formation of single-phase orthorhombic crystal structure at room temperature. Studies of dielectric properties (epsilon, tan delta) of the above compounds at frequencies 1, 10, 100 and 1000 kHz in a wide temperature range (300-700 K) exhibit the ferroclectric phase transitions of diffuse type.

• 出版日期2007-4