Synergistic regulation of temperature resistance and thermal insulation performance of zirconia-based ceramic fibers  

作　　者：Yong-Shuai Xie Ying Peng Zhe-Zhe Deng Ze Zhu Yuan Cheng De-Hua Ma Lu-Yi Zhu Xing-Hong Zhang 

机构地区：[1]State Key Laboratory of Crystal Materials,School of Crystal Materials,Shandong University,Jinan 250100,China [2]National Key Laboratory of Science and Technology on Advanced Composites in Special Environments,Harbin Institute of Technology,Harbin 150001,China

出　　处：《Rare Metals》2023年第12期4189-4200,共12页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos.52202090,52032003,52102093);Shandong University Young Scholars Program (No.2016WLJH27);the Fundamental Research Funds for the Central Universities (No.2082019014);China Postdoctoral Science Foundation (No.2021M690817);Heilongjiang Provincial Postdoctoral Science Foundation (Nos.LBH-Z21050 and LBHZ20144)。

摘　　要：ZrO_(2) fiber is a promising high-temperature resistant and heat-insulating fiber material.However,the decrease in mechanical properties caused by grain growth at high temperatures seriously affects its application.How to achieve the synergy of its temperature resistance and the thermal insulation performance is still the focus of the current industry.In this work,we started with doping inequivalent elements and studied the phase composition,temperature resistance,and thermal insulation properties of Y_(2)O_(3)-ZrO_(2) ceramic fibers by adjusting the Y/Zr molar ratio.The results showed that Y_(2)O_(3) could enter the crystal lattice of ZrO_(2) and form a solid solution.With the increase in Y_(2)O_(3) content,the structure of fibers changed from a tetragonal phase to a cubic phase,and the configurational entropy of the system increased.The larger configuration entropy in the sample could produce a robust steric hindrance effect,inhibiting grain growth.After heat treatment at 1300℃,the grain size of Y_(2)Zr_(2)O_(7)(Y5Z5)fibers was only 61.8%that of Y_(0.1)Zr_(0.9)O_(1.95)(Y1Z9)fibers.The smaller grain size made the Y5Z5 fibers still have excellent flexibility and deformation recovery performance after heat treatment at 1300℃and could still return to the original state after 85%compression or folded in half.In addition,due to the larger configurational entropy,the mean free path of phonon scattering was shortened,thereby improving the thermal insulation performance of the fiber.In short,this work achieves the synergistic effect of temperature resistance and thermal insulation properties of zirconia-based fiber materials only through simple inequivalent element doping.

关 键 词：Ceramics fiber ZrO_(2) Y_(2)O_(3) Thermal insulation Temperature resistance 

分 类 号：TQ343.41[化学工程—化纤工业]