Volume : IV, Issue : III, March - 2015

Dielectric properties of novel Sr0.3Ba0.7TiO3–Sr0.3Ba0.7Nb2O6 composite ceramic

Abhilash Kumar, Manisha Chawla, M. Fahim

Abstract :

A novel ferroelectric ceramic (Sr0.3Ba0.7TiO3–Sr0.3Ba0.7Nb2O6) was faicated from powders obtained through sol–gel technique using precursors of strontium, barium and titanium. These powders were synthesized using a chemical route by in–situ gelation of Ba–Sr–Ti sol and colloidal suspension of Nb2O5 powder in butanol dissolved Titanium butoxide precursor. As–fired powder was annealed at 850oC for 3 hours in a muffle furnace. The annealed powder was cold–pressed into pellets which were then sintered at 1200oC for two hours to form dense ceramics. Structural characterization of powders was done using x–ray diffraction and Raman spectroscopy. Dielectric measurements on ceramics were done using Agilent LCR meter to study the effect of the unique combination of SBT(0.5wt%) and SBN(0.5wt%) on temperature and frequency dependent dielectric properties of bulk ceramic. It was interesting to observe that the ceramic showed significantly different dielectric behavior than that of individual Sr0.3Ba0.7TiO3(SBT) and Sr0.3Ba0.7Nb2O6 (SBN) ceramic. The results were attributed to the strong microstructural changes that occurred due to the presence of different crystalline phases.

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Article: Download PDF   DOI : 10.36106/ijsr  

Cite This Article:

Abhilash Kumar, Manisha Chawla, M. Fahim Dielectric properties of novel Sr0.3Ba0.7TiO3- Sr0.3Ba0.7Nb2 O6 composite ceramic International Journal of Scientific Research, Vol : 4, Issue : 3 March 2015

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