Detailed structure analyses on Cobalt doped PbTiO3 powders

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Erünal E.

TURKISH JOURNAL OF CHEMISTRY, cilt.46, ss.1176-1184, 2022 (SCI-Expanded) identifier identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 46
  • Basım Tarihi: 2022
  • Doi Numarası: 10.55730/1300-0527.3425
  • Dergi Adı: TURKISH JOURNAL OF CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.1176-1184
  • Anahtar Kelimeler: Co3O4, Doping, sol-gel synthesis, perovskite, PbTiO3
  • Çukurova Üniversitesi Adresli: Evet

Özet

The identification of the defects and secondary phases which significantly affect the material
properties are of crucial importance. In this study, a systematic structure examination of PbTiO 3
and cobalt doped PbTiO3 powder ceramics were carried out. X-ray diffraction (XRD), Fourier-
transform infrared (FT-IR), Raman and electron paramagnetic resonance (EPR) spectroscopies
were applied along with non-simultaneous thermogravimetric analysis (TGA) and differential
scanning calorimetry (DSC). The doped and undoped PbTiO3 materials were synthesized via a
practical sol-gel route that takes place at 50 ºC. The perovskite formation for both materials was
verified. The dislocation density of cobalt doped PbTiO 3 was found to be 0.0121 nm-2 while it was
0.00239 nm-2 for the undoped material. Besides, a strong strain effect was observed for cobalt
doped PbTiO 3 via XRD. This was attributed to Co 3O 4 phase which was detected through EPR and
FT-IR analyses. The formation of Co3 O4 phase during synthesis revealed the previously
unexpected non-improved ferroelectric behavior for cobalt doped PbTiO3 . The dielectric constant

and the dielectric loss (tan δ) of cobalt doped PbTiO 3 were estimated as 1066 and 0.8370,
respectively.