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- Wednesday, September 14, 2005
- Simultaneous doping of Zn and Sb in SnO2 ceramics: Enhancement of electrical conductivity
- Published at:Not Found
Solid State Sciences 8 (2006) 7–13.
I. Saadeddin
, H.S. Hilal b, B. Pecquenard a, J. Marcus c, A. Mansouri d, C. Labrugerea ,M.A. Subramanian e, G. Campet a,
b
Department of Chemistry, An-Najah National University, PO Box 7, Nablus, Palestine
c
Laboratoire d’Etudes des Propriétés Electroniques des Solides (CNRS-UPR11), 25, Avenue des Martyrs, 38000 Grenoble, France
d
Institut Européen des Membranes (IEM), Université Montpellier II, Place Eugène Bataillon, 34095 Montpellier, France
e
DuPont Central Research & Development, Experimental Station, Wilmington, DE 19880-0328, USA
Abstract
SnO
2-based ceramics doped with Sb and/or Zn, have been prepared by solid state reaction at 1300 ◦C. The effect of dopants on electronic
properties and sintering behavior has been studied. While undoped SnO
2 pellets displayed very low electrical conductivities and lower densities,
the Sb-doped ceramics showed higher electrical conductivity, with almost no densification and a significant antimony loss. On the contrary, a high
densification and low conductivity are obtained for Zn-doped ceramics. Therefore, it is worthwhile to investigate SnO
2 ceramics co-doped with Sb
and Zn (SnO
2:Sb:Zn) to combine the advantages of both dopants. X-ray photoelectron spectroscopy (XPS) analysis confirmed that Sb5+ is mainly
substituted at the Sn
4+ site for Sb-doped ceramics and is in agreement with Hall-measurements. In the case of SnO2 samples co-doped with Sb
and Zn, XPS and Hall data confirmed the presence of both Sb
5+ and Sb3+. The SnO2:Sb:Zn system exhibited enhanced electrical conductivity
and high densities. In addition, the presence of Zn prevented the Sb evaporation during sintering.
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