TY - JOUR
T1 - Sol-gel preparation and characterization of Ni-YSZ cermet electrode
AU - Ohga, Emi
AU - Arima, Tatsumi
AU - Idemitsu, Kazuya
AU - Inagaki, Yaohiro
N1 - Funding Information:
The authors are indebted to M. Watanabe, the Center of Advanced Instrumental Analysis, Kyushu University. We would like to thank the financial support by Mukai Science and Technology Foundation.
PY - 2007/9
Y1 - 2007/9
N2 - Optimizing both the internal gelation (IGP) and EDTA (ethylene-diamine-tetra-acetic acid) complexes-gel reduction process (CGRP) was carried out for manufacturing Ni-YSZ (yttria-stabilized zirconia) cermet as the membrane electrode. For the IGP, we found the adequate additive amounts of gelling agent and stabilizer such as HMTA (hexamethylenetetramine) and urea for the starting solution, so that precursor gels containing Ni content of 45-61.3 mol% were successfully synthesized. However, the sample prepared via IGP did not show the electronic conductivity but ionic one, although NiO in the samples was completely reduced to Ni. This might be caused by a decrease of Ni content during sintering at high temperature. On the other hand, for EDTA CGRP, precursor gels were successfully synthesized by controlling pH value in the preparation of soluble complexes. In addition, the sample synthesized via EDTA CGRP showed the electronic conductivity for Ni content of 60 mol%.
AB - Optimizing both the internal gelation (IGP) and EDTA (ethylene-diamine-tetra-acetic acid) complexes-gel reduction process (CGRP) was carried out for manufacturing Ni-YSZ (yttria-stabilized zirconia) cermet as the membrane electrode. For the IGP, we found the adequate additive amounts of gelling agent and stabilizer such as HMTA (hexamethylenetetramine) and urea for the starting solution, so that precursor gels containing Ni content of 45-61.3 mol% were successfully synthesized. However, the sample prepared via IGP did not show the electronic conductivity but ionic one, although NiO in the samples was completely reduced to Ni. This might be caused by a decrease of Ni content during sintering at high temperature. On the other hand, for EDTA CGRP, precursor gels were successfully synthesized by controlling pH value in the preparation of soluble complexes. In addition, the sample synthesized via EDTA CGRP showed the electronic conductivity for Ni content of 60 mol%.
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U2 - 10.1016/j.pnucene.2007.08.008
DO - 10.1016/j.pnucene.2007.08.008
M3 - Article
AN - SCOPUS:35748959379
SN - 0149-1970
VL - 49
SP - 546
EP - 554
JO - Progress in Nuclear Energy
JF - Progress in Nuclear Energy
IS - 7
ER -