TY - JOUR
T1 - Effects of Cu and Zn co-doping on the electrical properties of Ni0.5Mn2.5O4 NTC ceramics
AU - Zhao, Chunhua
AU - Wang, Biyun
AU - Winnubst, Aloysius J.A.
AU - Yang, Pinghua
AU - Chen, Chusheng
PY - 2008
Y1 - 2008
N2 - The effects of Cu and Zn co-doping on Ni–Mn–O spinel-structured NTC ceramics were investigated. Dense Cu and Zn co-doped Ni0.5Mn2.5O4 spinel-structured ceramics were prepared from mixed oxalate-derived powders. XPS analysis revealed that in the co-doped material CuxZn1.0Ni0.5Mn1.5−xO4, the majority of Cu ions resided at the B-sites due to the almost exclusive occupation of Zn ions at the A-sites, but in the material doped with Cu alone, Cu ions were situated at both A- and B-sites. The co-doped material exhibited a significant decrease in electrical resistivity without much decrease in the thermal constant. In comparison with the material doped with Cu alone, the co-doped material also showed much improved electrical stability upon annealing at 150 °C in air, which is attributed to its stable distribution of cations in the spinel
AB - The effects of Cu and Zn co-doping on Ni–Mn–O spinel-structured NTC ceramics were investigated. Dense Cu and Zn co-doped Ni0.5Mn2.5O4 spinel-structured ceramics were prepared from mixed oxalate-derived powders. XPS analysis revealed that in the co-doped material CuxZn1.0Ni0.5Mn1.5−xO4, the majority of Cu ions resided at the B-sites due to the almost exclusive occupation of Zn ions at the A-sites, but in the material doped with Cu alone, Cu ions were situated at both A- and B-sites. The co-doped material exhibited a significant decrease in electrical resistivity without much decrease in the thermal constant. In comparison with the material doped with Cu alone, the co-doped material also showed much improved electrical stability upon annealing at 150 °C in air, which is attributed to its stable distribution of cations in the spinel
KW - IR-71884
KW - METIS-250430
U2 - 10.1016/j.jeurceramsoc.2007.06.007
DO - 10.1016/j.jeurceramsoc.2007.06.007
M3 - Article
VL - 28
SP - 35
EP - 40
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 1
ER -