Abstract
AbstractIn this work, we have prepared a novel yttria‐stabilized zirconia fiber (YSZf)‐reinforced (La1/5Nd1/5Sm1/5Gd1/5Yb1/5)2Zr2O7 porous ceramics (YSZf/(5RE1/5)2Zr2O7 PCs) through a foam‐gelcasting‐freeze drying process. The microstructure, phase composition, density, porosity, thermal conductivity, and compressive strength of the as‐prepared YSZf/(5RE1/5)2Zr2O7 PCs were systematically investigated. In addition, the high‐temperature thermal cycle stability and thermally insulating property of the samples were also tested. The results indicated that the as‐synthesized YSZf/(5RE1/5)2Zr2O7 PCs (with 25 wt% YSZ fibers) exhibited high porosity, high compressive strength, low thermal conductivity as well as low thermal cycling shrinkage. This work demonstrated that the added YSZ fiber can remarkably improve the strength of (5RE1/5)2Zr2O7 PCs with the high porosity, and as‐developed YSZf/(5RE1/5)2Zr2O7 PCs would be an excellent candidate for high‐temperature thermal insulator materials.
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