Abstract
This study examined the effects of samarium and erbium co-doping on the structural, optical, and electrical properties of ceria (CeO2). Ceramic (Ce0.8Sm0 .2-xErxO2-δ; x = 0, 0.05, 0.10, 0.15, 0.20) electrolytes were synthesized via sol-gel assisted citric acid–nitrate combustion and calcined at 850 °C for 5 h. The calcined electrolytes possessed a cubic fluorite crystal structure without impure phases. The direct band gap of the calcined electrolytes increased as the erbium content increased and the lowest band gap was obtained for Ce0.8Sm0.2O2-δ (SDC) electrolyte. The calcined electrolyte powders were subsequently pressed into cylindrical pellets by uniaxial die pressing, and the pellets were sintered at 1400 °C for 5 h. The sintered densities of the pellets were measured with Archimedes’ method. The relative density of Ce0.8Sm0.1Er0.1O2- δ co-doped ceria electrolyte was higher than those of singly doped ones, and these findings were further confirmed through field emission scanning electron microscopy. Electrochemical impedance spectroscopy indicated that the conductivity of erbium-doped ceria increased as the samarium content increased. The maximum total ionic conductivity was observed in Ce0.8Sm0.1Er0.1O2- δ co-doped electrolyte. However, the singly doped SDC electrolyte exhibited the highest ionic conductivity of 13.12 mS/cm and the lowest activation energy of 0.580 eV at 600 °C among all other Ce0.8Sm0 .2-xErxO2-δ co-doped ceria electrolytes.
| Original language | English |
|---|---|
| Pages (from-to) | 13639-13648 |
| Number of pages | 10 |
| Journal | Ceramics International |
| Volume | 44 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 15 Aug 2018 |
Fingerprint
Keywords
- B: X-ray diffraction
- C: Ionic conductivity
- C: Optical Properties
- Co-doping
- D: CeO
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Process Chemistry and Technology
- Surfaces, Coatings and Films
- Materials Chemistry
Cite this
Structural, optical and electrical properties of Ce0.8Sm0.2- xErxO2-δ (x = 0–0.2) Co-doped ceria electrolytes. / Anwar, Mustafa; Muhammed, Muhammed Ali; Baharuddin, Nurul Akidah; Raduwan, Nor Fatina; Muchtar, Andanastuti; Somalu, Mahendra Rao.
In: Ceramics International, Vol. 44, No. 12, 15.08.2018, p. 13639-13648.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Structural, optical and electrical properties of Ce0.8Sm0.2- xErxO2-δ (x = 0–0.2) Co-doped ceria electrolytes
AU - Anwar, Mustafa
AU - Muhammed, Muhammed Ali
AU - Baharuddin, Nurul Akidah
AU - Raduwan, Nor Fatina
AU - Muchtar, Andanastuti
AU - Somalu, Mahendra Rao
PY - 2018/8/15
Y1 - 2018/8/15
N2 - This study examined the effects of samarium and erbium co-doping on the structural, optical, and electrical properties of ceria (CeO2). Ceramic (Ce0.8Sm0 .2-xErxO2-δ; x = 0, 0.05, 0.10, 0.15, 0.20) electrolytes were synthesized via sol-gel assisted citric acid–nitrate combustion and calcined at 850 °C for 5 h. The calcined electrolytes possessed a cubic fluorite crystal structure without impure phases. The direct band gap of the calcined electrolytes increased as the erbium content increased and the lowest band gap was obtained for Ce0.8Sm0.2O2-δ (SDC) electrolyte. The calcined electrolyte powders were subsequently pressed into cylindrical pellets by uniaxial die pressing, and the pellets were sintered at 1400 °C for 5 h. The sintered densities of the pellets were measured with Archimedes’ method. The relative density of Ce0.8Sm0.1Er0.1O2- δ co-doped ceria electrolyte was higher than those of singly doped ones, and these findings were further confirmed through field emission scanning electron microscopy. Electrochemical impedance spectroscopy indicated that the conductivity of erbium-doped ceria increased as the samarium content increased. The maximum total ionic conductivity was observed in Ce0.8Sm0.1Er0.1O2- δ co-doped electrolyte. However, the singly doped SDC electrolyte exhibited the highest ionic conductivity of 13.12 mS/cm and the lowest activation energy of 0.580 eV at 600 °C among all other Ce0.8Sm0 .2-xErxO2-δ co-doped ceria electrolytes.
AB - This study examined the effects of samarium and erbium co-doping on the structural, optical, and electrical properties of ceria (CeO2). Ceramic (Ce0.8Sm0 .2-xErxO2-δ; x = 0, 0.05, 0.10, 0.15, 0.20) electrolytes were synthesized via sol-gel assisted citric acid–nitrate combustion and calcined at 850 °C for 5 h. The calcined electrolytes possessed a cubic fluorite crystal structure without impure phases. The direct band gap of the calcined electrolytes increased as the erbium content increased and the lowest band gap was obtained for Ce0.8Sm0.2O2-δ (SDC) electrolyte. The calcined electrolyte powders were subsequently pressed into cylindrical pellets by uniaxial die pressing, and the pellets were sintered at 1400 °C for 5 h. The sintered densities of the pellets were measured with Archimedes’ method. The relative density of Ce0.8Sm0.1Er0.1O2- δ co-doped ceria electrolyte was higher than those of singly doped ones, and these findings were further confirmed through field emission scanning electron microscopy. Electrochemical impedance spectroscopy indicated that the conductivity of erbium-doped ceria increased as the samarium content increased. The maximum total ionic conductivity was observed in Ce0.8Sm0.1Er0.1O2- δ co-doped electrolyte. However, the singly doped SDC electrolyte exhibited the highest ionic conductivity of 13.12 mS/cm and the lowest activation energy of 0.580 eV at 600 °C among all other Ce0.8Sm0 .2-xErxO2-δ co-doped ceria electrolytes.
KW - B: X-ray diffraction
KW - C: Ionic conductivity
KW - C: Optical Properties
KW - Co-doping
KW - D: CeO
UR - http://www.scopus.com/inward/record.url?scp=85046369932&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85046369932&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2018.04.200
DO - 10.1016/j.ceramint.2018.04.200
M3 - Article
AN - SCOPUS:85046369932
VL - 44
SP - 13639
EP - 13648
JO - Ceramics International
JF - Ceramics International
SN - 0272-8842
IS - 12
ER -