TY - JOUR
T1 - Fracture properties of (CeO2)1-x(RO 1.5)x (R = Y, Gd, and Sm; X = 0.02-0.20) ceramics
AU - Ishida, T.
AU - Iguchi, F.
AU - Sato, K.
AU - Hashida, T.
AU - Yugami, H.
N1 - Funding Information:
This research was partially supported by the Ministry of Education, Science, Sports and Culture, Grant-in-Aid for Scientific Research on Priority Areas (No. 439). The authors appreciate Mr. Y. Endo for his experimental work at the early stage of this work. The authors are also grateful Dr. K. Sato for useful discussions on fractural properties of ceramics.
PY - 2005/10
Y1 - 2005/10
N2 - The fracture properties of rare earth (yttrium, gadolinium, and samarium) doped ceria ceramics were systematically investigated using the modified small punch method at room temperature in air and at high temperatures in argon gas. The samples prepared by oxalate co-precipitation method showed higher fracture strength than those by solid-state reaction method. In addition, the sintering temperature dependence of gadolinium doped ceria indicated that the highest fracture strength was attained by sintering at 1600 °C. Furthermore, it turned out that the fracture strength was influenced by the dopant concentration rather than the kind of dopant. The relationship between mechanical properties and defect structures are discussed from the dopant concentration, sintering temperature and testing temperature dependence of the fracture strength.
AB - The fracture properties of rare earth (yttrium, gadolinium, and samarium) doped ceria ceramics were systematically investigated using the modified small punch method at room temperature in air and at high temperatures in argon gas. The samples prepared by oxalate co-precipitation method showed higher fracture strength than those by solid-state reaction method. In addition, the sintering temperature dependence of gadolinium doped ceria indicated that the highest fracture strength was attained by sintering at 1600 °C. Furthermore, it turned out that the fracture strength was influenced by the dopant concentration rather than the kind of dopant. The relationship between mechanical properties and defect structures are discussed from the dopant concentration, sintering temperature and testing temperature dependence of the fracture strength.
KW - CeO
KW - Fracture strength
KW - Mechanical properties
KW - Rare earth doped ceria
KW - SOFC
KW - SP test
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U2 - 10.1016/j.ssi.2005.06.031
DO - 10.1016/j.ssi.2005.06.031
M3 - Conference article
AN - SCOPUS:25444529680
VL - 176
SP - 2417
EP - 2421
JO - Solid State Ionics
JF - Solid State Ionics
SN - 0167-2738
IS - 31-34
T2 - 30th Symposium on Solid State Ionics in Japan
Y2 - 1 December 2004 through 3 December 2004
ER -