Influence of mixing time on the purity and physical properties of SrFe0.5Ti0.5O3-δ powders produced by solution combustion

Nurul Akidah Baharuddin, Andanastuti Muchtar, Mahendra Rao Somalu, Mohadeseh Seyednezhad

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This study explored the effects of mixing time on the purity and physical properties of synthesized perovskite (SrFe0.5Ti0.5O3-δ) powders. SrFe0.5Ti0.5O3-δ powders were prepared with solution combustion, in which various precursor solutions were utilized with different mixing times. The precursor powders were calcined at a certain temperature that was determined via thermogravimetric and Fourier-transform infrared analyses. Each batch of calcined powders underwent X-ray diffraction to analyze the purity and phase formation of the yield. By increasing the mixing time to 45 h, pure cubic-structured SrFe0.5Ti0.5O3-δ powders were formed and the crystallite size decreased. The average crystallite size decreased from 30.46 to 28.96 nm with the increase of mixing time (from 5 to 45 h). The powders produced after 45 h of mixing exhibited pure phase. These powders were further analyzed using field emission scanning electron microscopy (FESEM), dynamic light scattering (DLS), and energy-dispersive X-ray spectroscopy (EDX). The average particle sizes of 1.5849 and 1.6219 μm were measured with the statistical distribution of micrographs, which were obtained from FESEM, and DLS analysis, respectively. Results obtained from EDX confirmed that the elements were homogenously distributed after 45 h of mixing. To examine the suitability of pure SrFe0.5Ti0.5O3-δ powders as fuel cell cathode material, electrical conductivity was measured, obtaining a value of 6.32 S cm− 1. This value is higher than the electrical conductivity of the same composition of powders synthesized using solid-state method.

Original languageEnglish
Pages (from-to)382-388
Number of pages7
JournalPowder Technology
Volume313
DOIs
Publication statusPublished - 15 May 2017

Fingerprint

Powders
Physical properties
Dynamic light scattering
Crystallite size
Field emission
Scanning electron microscopy
Perovskite
X ray powder diffraction
Fuel cells
Fourier transforms
Cathodes
Particle size
Infrared radiation
Chemical analysis

Keywords

  • Crystallite size
  • Mixing time
  • Particle size
  • Perovskite
  • Purity
  • Solution combustion

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

Influence of mixing time on the purity and physical properties of SrFe0.5Ti0.5O3-δ powders produced by solution combustion. / Baharuddin, Nurul Akidah; Muchtar, Andanastuti; Somalu, Mahendra Rao; Seyednezhad, Mohadeseh.

In: Powder Technology, Vol. 313, 15.05.2017, p. 382-388.

Research output: Contribution to journalArticle

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AB - This study explored the effects of mixing time on the purity and physical properties of synthesized perovskite (SrFe0.5Ti0.5O3-δ) powders. SrFe0.5Ti0.5O3-δ powders were prepared with solution combustion, in which various precursor solutions were utilized with different mixing times. The precursor powders were calcined at a certain temperature that was determined via thermogravimetric and Fourier-transform infrared analyses. Each batch of calcined powders underwent X-ray diffraction to analyze the purity and phase formation of the yield. By increasing the mixing time to 45 h, pure cubic-structured SrFe0.5Ti0.5O3-δ powders were formed and the crystallite size decreased. The average crystallite size decreased from 30.46 to 28.96 nm with the increase of mixing time (from 5 to 45 h). The powders produced after 45 h of mixing exhibited pure phase. These powders were further analyzed using field emission scanning electron microscopy (FESEM), dynamic light scattering (DLS), and energy-dispersive X-ray spectroscopy (EDX). The average particle sizes of 1.5849 and 1.6219 μm were measured with the statistical distribution of micrographs, which were obtained from FESEM, and DLS analysis, respectively. Results obtained from EDX confirmed that the elements were homogenously distributed after 45 h of mixing. To examine the suitability of pure SrFe0.5Ti0.5O3-δ powders as fuel cell cathode material, electrical conductivity was measured, obtaining a value of 6.32 S cm− 1. This value is higher than the electrical conductivity of the same composition of powders synthesized using solid-state method.

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