Structural And Electrical Properties Of Ba3Sr2GdTi3V7O30
B. B. Mohanty, P. S. Sahoo, M. P. K. Sahoo and R. N. P. Choudhary
Volume 3, Issue 4, Page 305-308 | DOI: 10.5185/amlett.2011.11317
Keywords: Ceramics; electrical properties; dielectrics; XRD.
The polycrystalline Ba3Sr2GdTi3V7O30 material of tungsten bronze structural family was prepared by a high-temperature solid-state reaction technique. Preliminary X-ray diffraction analysis exhibits the formation of single-phase compound with orthorhombic crystal system. Surface micrograph recorded by scanning electron microscopic (SEM) technique has well defined but non-uniformly distributed grains throughout the surface of the pellet sample. Detailed studies of dielectric properties as a function of temperature (306-773 K) and frequencies (102-106Hz) suggest that the compound has frequency independent diffused dielectric anomaly at a temperature ~620 K which may be related to ferroelectric phase transition which is confirmed from polarization study. The frequency and temperature dependence of impedance property of the material were analyzed using a complex impedance spectroscopy. The Nyquist plots confirmed the presence of grain and grain boundary effect in the material. Copyright © 2012 VBRI press.