PREPARATION OF HOLLOW YSZ FIBER BY ELECTROCHEMICAL VAPOR-DEPOSITION

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.