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The influence of Ce0.68Zr0.32O2 solid solution on properties of γ-alumina based washcoat on FeCrAl foils was investigated. FeCrAl foils were pretreated at 950°C in air for 10 h before coating washcoat. Different amounts of Ce0.68Zr0.32O2 solid solution were added into ã-alumina-based slurries. The properties of washcoats were measured by ultrasonic vibration and thermal shock test, SEM, BET and XRD. The results show that the addition of Ce0.68Zr0.32O2 solid solution into slurries can improve γ-Al2O3-based washcoat adhesion on FeCrAl foils. The more the Ce0.68Zr0.32O2 solid solution added into slurries, the higher was the specific surface area of aged samples. XRD characterization proved that ceria-zirconia solid solution can inhibit the transformation of γ-A12O3 crystal into others at 1050°C for 20 h.

Influence of Ce0.68Zr0.32O2 solid solution on depositing γ-alumina washcoat on FeCrAl foils