Abstract
ZrO 2 buffer layers were successfully dip-coated on stainless steel (SS) foils via a sol–gel process, using 30 mol% SiO 2 as a stabilizing agent and zirconyl chloride octahydrate (ZrOCl 2·8H 2O) as the precursor. The buffer layer was characterized by X-ray diffraction analysis, Fourier transform-infrared spectroscopy, Auger electron spectroscopy, and scanning electron microscopy. The introduction of SiO 2 retarded ZrO 2 phase transformation from tetragonal to monoclinic. The normal emittances of the Au/ZrO 2/SS foils before and after heat-treatment in air at 850°C are 0.038 and 0.043, respectively. The ZrO 2 buffer layer effectively suppresses interdiffusion between the gold film and the SS substrate at high temperature.
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