کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1475548 | 1510143 | 2013 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis and thermal stability of Re2Zr2O7, (Re = La, Gd) and La2(Zr1−xCex)2O7−δ compounds under reducing and oxidant atmospheres for thermal barrier coatings Synthesis and thermal stability of Re2Zr2O7, (Re = La, Gd) and La2(Zr1−xCex)2O7−δ compounds under reducing and oxidant atmospheres for thermal barrier coatings](/preview/png/1475548.png)
Rare-earth zirconates and cerates have attracted particular interest for thermal barrier coating (TBC) applications due to their advantageous thermal properties, such as a low conductivity and efficient phase stability at elevated temperatures. This study focuses on synthesising La2Zr2O7, Gd2Zr2O7, La2Ce2O7−γ and La2(Zr0.7Ce0.3)O7−γ compounds via two soft chemistry processes, alkoxide and citrate synthesis. Thermal analysis, X-ray diffraction (XRD) and scanning electron microscope observations were used to analyse the powder after calcinations under air. Chemical reactivity tests under a reducing atmosphere were performed at 1400 °C and investigated by XRD analysis. It was found that the lanthanum and gadolinium zirconates are the most stable and interesting materials under an Ar(g)/3%H2(g) atmosphere.
Journal: Journal of the European Ceramic Society - Volume 33, Issues 13–14, November 2013, Pages 2633–2644