Abstract Ce-doped yttria-stabilized ZrO 2 (YSZ) fibers were prepared with different Ce concentrations (0, 5, 10, 20 mol%) by the sol-gel method. The effects of Ce addition on the microstructure and mechanical properties of the YSZ fibers have been investigated. Compared with the pure YSZ fibers, the Ce addition could cause grain refinement whose mechanism was discussed. Moreover, mechanical measurements showed that the Ce addition could increase the Young's modulus and microhardness of the YSZ fibers. When the doping content was 10%, the values of Young's modulus and microhardness were improved by almost 3 times and 2 times compared with those of the pure YSZ fibers, respectively. Results show that the Ce addition could improve the thermal insulation, thermal conductivity at 800 °C being reduced by over one third (33.52%) when the amount of Ce increased to 20%.

中文翻译：

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添加铈对YSZ纤维微观结构、力学性能和热导率的影响

摘要 采用溶胶-凝胶法制备了不同Ce浓度(0, 5, 10, 20 mol%)的Ce掺杂氧化钇稳定ZrO 2 (YSZ)纤维。已经研究了Ce添加对YSZ纤维的微观结构和机械性能的影响。与纯 YSZ 纤维相比，Ce 的添加会导致晶粒细化，其机制已被讨论。此外，机械测量表明，添加 Ce 可以增加 YSZ 纤维的杨氏模量和显微硬度。当掺杂量为10%时，杨氏模量和显微硬度值分别比纯YSZ纤维提高了近3倍和2倍。结果表明，添加 Ce 可以提高隔热性，800 °C 时的热导率降低三分之一以上 (33.