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Effect of elevated concentrations of strontium and iron on the structural and dielectric characteristics of Ba(1-x-y)Sr(x)Ti Fe(y)O3 prepared through sol-gel technique
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.ORCID iD: 0000-0001-6235-7038
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
NRC, Egypt .
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2012 (English)In: Physica. B, Condensed matter, ISSN 0921-4526, E-ISSN 1873-2135, Vol. 407, no 14, 2697-2704 p.Article in journal (Refereed) Published
Abstract [en]

Nano-composite Ba1-xSr(x)TiO3 (BST), where x=0.01-0.50 and doped with different concentrations of iron Ba(1-x-y)Sr(x)TiFe(y)O3 (BSTF), where x=0.01 and y=0.01-0.05 powders were prepared by sol-gel method. The effect of increasing the iron and strontium concentrations substituted in Barium strontium titanate system will be studied. The prepared samples have a tetragonal crystalline phase after sintering for 1 h at 750 degrees C in air. The structural and the morphological features of the systems have been studied using X-ray diffraction (XRD), transmission electron microscope (TEM) and scanning electron microscope (SEM). The dielectric properties of the BST and BSTF systems have been investigated as a function of temperature and frequency. The dielectric measurements are carried out in the frequency range 42 Hz-1 MHz, at a temperature ranging between 25 and 250 degrees C. The results showed a decrease in T-c temperature giving the following values 90 and 85 degrees C for B10ST and B10ST5F prepared powder samples, respectively, implying tetragonal, feroelectric phase at lower temperature into cubic, para-electric phase at temperature higher than T-c.

Place, publisher, year, edition, pages
Elsevier , 2012. Vol. 407, no 14, 2697-2704 p.
Keyword [en]
Nano-composite BaSrTiO3 (BST); Iron-doping; Sol-gel; Dielectric permittivity; Phase and microstructure
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-79783DOI: 10.1016/j.physb.2012.03.023ISI: 000305468000008OAI: oai:DiVA.org:liu-79783DiVA: diva2:545011
Available from: 2012-08-17 Created: 2012-08-14 Last updated: 2017-12-07

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Nur, OmerWillander, Magnus

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