TY - JOUR
T1 - Solid electrolytes for use in lead–bismuth eutectic cooled nuclear reactors
AU - Mariën, An
AU - Lim, Jun
AU - Rosseel, Kris
AU - Vandermeulen, Willy
AU - Van den Bosch, Joris
N1 - Score = 10
PY - 2012/8
Y1 - 2012/8
N2 - The operating temperature of electrochemical oxygen sensors can likely be lowered by reducing the solid electrolyte resistance. Most often, these sensors use yttria partially stabilized zirconia (e.g. (Y2O3)0.05(ZrO2)0.95, (5-YSZ)) as solid electrolyte. In this paper, we discuss the use of better conducting ceramics than yttria partially stabilized zirconia, as solid electrolytes for oxygen sensors that can be applied in lead-bismuth eutectic (LBE) cooled nuclear reactors. Two stabilized zirconia ceramics ((Y2O3)0.08(ZrO2)0.92, (8-YSZ); (Sc2O3)0.1(CeO2)0.01(ZrO2)0.89) are investigated as well as a hypostoichiometric perovskite-type La0.8Sr0.2Ga0.8Mg0.2O3-d. The results of microstructural analyses, thermochemical stability tests in LBE (at 360 °C), as well as mechanical tests and four-probe d.c. conductivity measurements (at 300 – 800 °C) are discussed and compared with the results that were obtained for a commercially available 5-YSZ (Friatec AG, Germany) . Of the three studied ceramics, 8-YSZ was identified as the most promising solid electrolyte to reduce the operating temperature of electrochemical oxygen sensors.
AB - The operating temperature of electrochemical oxygen sensors can likely be lowered by reducing the solid electrolyte resistance. Most often, these sensors use yttria partially stabilized zirconia (e.g. (Y2O3)0.05(ZrO2)0.95, (5-YSZ)) as solid electrolyte. In this paper, we discuss the use of better conducting ceramics than yttria partially stabilized zirconia, as solid electrolytes for oxygen sensors that can be applied in lead-bismuth eutectic (LBE) cooled nuclear reactors. Two stabilized zirconia ceramics ((Y2O3)0.08(ZrO2)0.92, (8-YSZ); (Sc2O3)0.1(CeO2)0.01(ZrO2)0.89) are investigated as well as a hypostoichiometric perovskite-type La0.8Sr0.2Ga0.8Mg0.2O3-d. The results of microstructural analyses, thermochemical stability tests in LBE (at 360 °C), as well as mechanical tests and four-probe d.c. conductivity measurements (at 300 – 800 °C) are discussed and compared with the results that were obtained for a commercially available 5-YSZ (Friatec AG, Germany) . Of the three studied ceramics, 8-YSZ was identified as the most promising solid electrolyte to reduce the operating temperature of electrochemical oxygen sensors.
KW - electrochemical oxygen sensor
KW - lead-bismuth eutectic
KW - low temperature
KW - stabilized zirconia
KW - LSGM
KW - microstructural analyses
KW - four-probe d.c. conductivity measurements
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_121217
UR - http://knowledgecentre.sckcen.be/so2/bibref/9084
U2 - 10.1016/j.jnucmat.2012.04.009
DO - 10.1016/j.jnucmat.2012.04.009
M3 - Article
SN - 0022-3115
VL - 427
SP - 39
EP - 45
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3
ER -