Abstract
In this study Scandia-doped zirconia co-doped with MgO, (MgO)0.03(ZrO2)0.88(Sc2O3)0.09, was synthetized by using the urea co-precipitation method in hot aqueous solution. MgO was added to prevent the transformation of cubic fluorite Sc-doped ZrO2 into rhombohedral phase, with worst electrical properties. The as-prepared powders were completely amorphous and, by a calcination step at 500 °C for 1 h, full conversion to fluorite phase occurred preserving the nano size character of powders. The presence of MgO allowed to effectively stabilize the cubic fluorite phase also after a prolonged thermal treatment at 1200 °C. The nanometric feature of the powder aided the sintering step of this material at 1600 °C. The EIS electrical characterization revealed that its ionic conductivity is 7.3.10-2 S/cm and 2.8.10-2 S/cm at 800 °C and 700 °C, respectively. Therefore, this material is suitable as ceramic electrolyte in SOFC operated at intermediate temperatures.
| Original language | English |
|---|---|
| Title of host publication | Chemical Engineering Transactions |
| Publisher | Italian Association of Chemical Engineering - AIDIC |
| Pages | 1345-1350 |
| Number of pages | 6 |
| Volume | 57 |
| ISBN (Electronic) | 9788895608488 |
| DOIs | |
| Publication status | Published - 2017 |
| Externally published | Yes |
Publication series
| Name | Chemical Engineering Transactions |
|---|---|
| Volume | 57 |
| ISSN (Electronic) | 2283-9216 |
Fingerprint
ASJC Scopus subject areas
- Chemical Engineering(all)
Cite this
Electrical behaviour and microstructural characterization of magnesia co-doped ScSZ nanopowders synthesized by urea co-precipitation. / Accardo, Grazia; Dell'agli, Gianfranco; Frattini, Domenico; Spiridigliozzi, Luca; Nam, SukWoo; Yoon, Sung Pil.
Chemical Engineering Transactions. Vol. 57 Italian Association of Chemical Engineering - AIDIC, 2017. p. 1345-1350 (Chemical Engineering Transactions; Vol. 57).Research output: Chapter in Book/Report/Conference proceeding › Chapter
}
TY - CHAP
T1 - Electrical behaviour and microstructural characterization of magnesia co-doped ScSZ nanopowders synthesized by urea co-precipitation
AU - Accardo, Grazia
AU - Dell'agli, Gianfranco
AU - Frattini, Domenico
AU - Spiridigliozzi, Luca
AU - Nam, SukWoo
AU - Yoon, Sung Pil
PY - 2017
Y1 - 2017
N2 - In this study Scandia-doped zirconia co-doped with MgO, (MgO)0.03(ZrO2)0.88(Sc2O3)0.09, was synthetized by using the urea co-precipitation method in hot aqueous solution. MgO was added to prevent the transformation of cubic fluorite Sc-doped ZrO2 into rhombohedral phase, with worst electrical properties. The as-prepared powders were completely amorphous and, by a calcination step at 500 °C for 1 h, full conversion to fluorite phase occurred preserving the nano size character of powders. The presence of MgO allowed to effectively stabilize the cubic fluorite phase also after a prolonged thermal treatment at 1200 °C. The nanometric feature of the powder aided the sintering step of this material at 1600 °C. The EIS electrical characterization revealed that its ionic conductivity is 7.3.10-2 S/cm and 2.8.10-2 S/cm at 800 °C and 700 °C, respectively. Therefore, this material is suitable as ceramic electrolyte in SOFC operated at intermediate temperatures.
AB - In this study Scandia-doped zirconia co-doped with MgO, (MgO)0.03(ZrO2)0.88(Sc2O3)0.09, was synthetized by using the urea co-precipitation method in hot aqueous solution. MgO was added to prevent the transformation of cubic fluorite Sc-doped ZrO2 into rhombohedral phase, with worst electrical properties. The as-prepared powders were completely amorphous and, by a calcination step at 500 °C for 1 h, full conversion to fluorite phase occurred preserving the nano size character of powders. The presence of MgO allowed to effectively stabilize the cubic fluorite phase also after a prolonged thermal treatment at 1200 °C. The nanometric feature of the powder aided the sintering step of this material at 1600 °C. The EIS electrical characterization revealed that its ionic conductivity is 7.3.10-2 S/cm and 2.8.10-2 S/cm at 800 °C and 700 °C, respectively. Therefore, this material is suitable as ceramic electrolyte in SOFC operated at intermediate temperatures.
UR - http://www.scopus.com/inward/record.url?scp=85021671691&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85021671691&partnerID=8YFLogxK
U2 - 10.3303/CET1757225
DO - 10.3303/CET1757225
M3 - Chapter
VL - 57
T3 - Chemical Engineering Transactions
SP - 1345
EP - 1350
BT - Chemical Engineering Transactions
PB - Italian Association of Chemical Engineering - AIDIC
ER -