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Integrated Ferroelectrics
An International Journal
Volume 118, 2010 - Issue 1
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Original Articles

Synthesis and Characterization of Isovalent Substituted BaTiO3 Ceramics by Modified Chemical Route

Sonia Department of Chemistry, National Institute of Technology, Rourkela, 769008, India
,
R. K. Patel Department of Chemistry, National Institute of Technology, Rourkela, 769008, India
,
Pawan Kumar Department of Physics, National Institute of Technology, Rourkela, 769008, India
&
Chandra Prakash Directorate of ER & IPR, DRDO, New Delhi, 110105, India
Pages 106-113 | Received 13 Dec 2009, Accepted 03 May 2010, Published online: 01 Dec 2010
 
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Abstract

Iso-valent ion substituted barium titanate (Ba0.96Sr0.04TiO3 & Ba0.96Mg0.04TiO3) ferroelectric samples were synthesized in single perovskite phase by modified chemical route. For single perovskite phase and dense grain morphology formation, 900°C and 1300°C temperatures were optimized as calcination and sintering temperatures, respectively. Room temperature (RT) dielectric constant (ϵr) and dielectric loss (tanδ) of Ba0.96Mg0.04TiO3 & Ba0.96Sr0.04TiO3 systems at 1 kHz frequency were found to be ∼ 576 & 0.019 and 2300 & 0.13, respectively. Curie temperature, Tc, of Ba0.96Sr0.04TiO3 and Ba0.96Mg0.04TiO3 samples were found to be around ∼105 and 75°C, respectively.

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