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
2012 (English)In: Physica. B, Condensed matter, ISSN 0921-4526, Vol. 407, no 14, 2697-2704 p.Article in journal (Refereed) Published
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.
Nano-composite BaSrTiO3 (BST); Iron-doping; Sol-gel; Dielectric permittivity; Phase and microstructure
National CategoryEngineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-79783DOI: 10.1016/j.physb.2012.03.023ISI: 000305468000008OAI: oai:DiVA.org:liu-79783DiVA: diva2:545011