TY - JOUR
T1 - Evaluation of elastic property of (CeO 2) 1-x(YO 1.5)x ceramics
AU - Sato, Kazuhisa
AU - Hashida, Toshiyuki
AU - Suzuki, Ken
AU - Yugami, Hiroo
AU - Kawada, Tatsuya
AU - Mizusaki, Junichiro
PY - 2005/11
Y1 - 2005/11
N2 - The influences of the sintering additive content of Y 2O 3 on elastic modulus of ceria ceramics were investigated by small punch (SP) testing method and molecular dynamics (MD) method. Y 2O 3 doped ceria powders with a composition of (CeO 2) 1-x(YO 1.5) x (x=0, 0.10, 0.15, 0.20, 0.30, 0.40) were prepared by a co-precipitation method. The powders were compacted by die pressing (50 MPa) followed by cold isostatic pressing (120 MPa), and sintered at 1500°C in air for 5 h. The elastic modulus was decreased significantly with increasing additive contents of the Y 2O 3 oxides. Especially, it tended to exhibit a minimum value at 10-20 mol%. However, ionic conductivity increased with increasing additive content of the Y 2O 3 oxides, exhibited a maximum value at 15 mol%. Calculation model and interatomic potential were shown to be useful to evaluate the elastic property.
AB - The influences of the sintering additive content of Y 2O 3 on elastic modulus of ceria ceramics were investigated by small punch (SP) testing method and molecular dynamics (MD) method. Y 2O 3 doped ceria powders with a composition of (CeO 2) 1-x(YO 1.5) x (x=0, 0.10, 0.15, 0.20, 0.30, 0.40) were prepared by a co-precipitation method. The powders were compacted by die pressing (50 MPa) followed by cold isostatic pressing (120 MPa), and sintered at 1500°C in air for 5 h. The elastic modulus was decreased significantly with increasing additive contents of the Y 2O 3 oxides. Especially, it tended to exhibit a minimum value at 10-20 mol%. However, ionic conductivity increased with increasing additive content of the Y 2O 3 oxides, exhibited a maximum value at 15 mol%. Calculation model and interatomic potential were shown to be useful to evaluate the elastic property.
KW - Ceria ceramics
KW - Elastic modulus
KW - Molecular dynamics (MD) method
KW - Small punch (SP) testing method
KW - Solid oxide fuel cell
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U2 - 10.2497/jjspm.52.840
DO - 10.2497/jjspm.52.840
M3 - 学術論文
AN - SCOPUS:31344439988
SN - 0532-8799
VL - 52
SP - 840
EP - 844
JO - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
JF - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
IS - 11
ER -