Phase formation and dielectric properties of Ba0.5Sr0.5TiO3 by slow injection sol–gel technique

Balachandran, R. and Yow, H. K. and Ong, B. H. and Tan, K. B. and Anuar, K. and Teoh, W. T. and Ahmad Fauzi, M. N. and Sreekantan, S. and Swaminathan, V. (2011) Phase formation and dielectric properties of Ba0.5Sr0.5TiO3 by slow injection sol–gel technique. Journal of Materials Science, 46 (6). pp. 1806-1813. ISSN 0022-2461

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Official URL: http://dx.doi.org/10.1007/s10853-010-5004-4

Abstract

A simple sol–gel process incorporating slow precursor injection technique was employed to synthesize homogeneous Ba0.5Sr0.5TiO3 nano powders. The Ba0.5Sr0.5TiO3 samples were subjected to calcination temperatures from 600 to 1,100 °C and sintering temperatures from 1,250 to 1,350 °C for the study of phase formation, crystallite size, particle distribution, and dielectric properties. Single phase Ba0.5Sr0.5TiO3 with a cubic perovskite structure was successfully synthesized after calcination at 800 °C. The average size of the nano particles is 42 nm with a narrow size distribution, and a standard deviation of 10%. The highest values recorded within the investigated range for dielectric constant, and dielectric loss measured at 1 kHz are 1,164 and 0.063, respectively, for Ba0.5Sr0.5TiO3 pellets calcined at 800 °C and sintered at 1,350 °C. Leakage current density measured at 5 V for the Ba0.5Sr0.5TiO3 pellet was found to be 49.4 pA/cm2.

Item Type: Article
Subjects: Q Science > Q Science (General)
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Rosnani Abd Wahab
Date Deposited: 24 Jan 2014 07:30
Last Modified: 24 Jan 2014 07:30
URI: http://shdl.mmu.edu.my/id/eprint/4988

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