TY - JOUR
T1 - Reduction reactions in doped ceria ceramics studied by dilatometry
AU - Mogensen, G.
AU - Mogensen, Mogens Bjerg
PY - 1993
Y1 - 1993
N2 - Reduction of pure and doped CeO2 to CeO2-x is associated with an expansion. The behaviour of pure CeO2, Ce0.9Ca0.1O1.9, Ce0.8Ca0.2O1.8 and Ce0.6Gd0.4O1.8 at 1000-degrees-C in the oxygen partial pressure range from 0.21 atm to 10(-18) atm is described. The results show that even though the nominal concentration of oxide vacancies are equal in the two mostly doped cerias, the CaO-doped one expands much more than the Gd2O3-doped one. The max. expansion of CeO2 was about 2.2%, of Ce0.8Ca0.2O1.8 1.5%, and Ce0.6Gd0.4O1.8 0.8%. The results are compared with high temperature XRD data from literature.
AB - Reduction of pure and doped CeO2 to CeO2-x is associated with an expansion. The behaviour of pure CeO2, Ce0.9Ca0.1O1.9, Ce0.8Ca0.2O1.8 and Ce0.6Gd0.4O1.8 at 1000-degrees-C in the oxygen partial pressure range from 0.21 atm to 10(-18) atm is described. The results show that even though the nominal concentration of oxide vacancies are equal in the two mostly doped cerias, the CaO-doped one expands much more than the Gd2O3-doped one. The max. expansion of CeO2 was about 2.2%, of Ce0.8Ca0.2O1.8 1.5%, and Ce0.6Gd0.4O1.8 0.8%. The results are compared with high temperature XRD data from literature.
KW - Fremtidig energiteknologi
U2 - 10.1016/0040-6031(93)80036-A
DO - 10.1016/0040-6031(93)80036-A
M3 - Journal article
SN - 0040-6031
VL - 214
SP - 47
EP - 50
JO - Thermochimica Acta
JF - Thermochimica Acta
IS - 1
ER -