TITLE:
Impedance Spectroscopy of Zr Modified Ba5SmZr3V7O30 Ceramic
AUTHORS:
B. K. Giri, B. B. Mohanty, P. S. Sahoo, R. N. P. Choudhary
KEYWORDS:
Ceramics, Tungsten Bronze Structure, Solid-State Reaction, X-Ray Diffraction
JOURNAL NAME:
Open Access Library Journal,
Vol.5 No.6,
June
8,
2018
ABSTRACT: Ba5SmZr3V7O30 is a new tungsten bronze structured ceramic compound prepared by substituting Zr at Ti site in Ba5GdTi3V7O30 following high-temperature solid-state reaction route. The X-ray diffraction analysis of the compound confirms the formation of single-phase orthorhombic structures at room temperature. Surface morphology of the compound was studied by scanning electron microscopy. Using a Hioki LCR meter, the effects of temperature (32℃ - 500℃) and frequency (102 - 106 Hz) on structural and electrical properties were studied. Detailed analysis of impedance parameters furnishes a better conception of the electrical properties and type of relaxation processes in the material. The plateau region of the Z’~ frequency plot also indicates the presence of relaxation process in the material. The bulk resistance is observed to be decreased with rise in temperature showing a typical negative temperature coefficient of resistance (NTCR) behavior.