Yttria-stabilized zirconia (YSZ) thin films were prepared on NiO pelle
ts by a vapour-phase reaction using ZrCl4 and YCl3 as metal sources an
d the NiO substrate as an oxygen source for the reaction. The film obt
ained was cubic YSZ, and its Y2O3 content was approx. 8 mol%. The effe
ct of the sintering temperature of NiO substrates was examined. A surf
ace-oxidized nickel wire was then used as a substrate, and a cubic YSZ
layer was coated over the wire. The substrate (nickel and nickel oxid
e) was dissolved in aqueous hydrochloric acid, and a hollow YSZ fibre
of approx. 100 mu m diameter was obtained.