耐高温SiO_(2)/ZrO_(2)纳米纤维膜的力学和隔热性能  

Mechanical Property and Thermal Insulation Performance of SiO_(2)/ZrO_(2) Nanofiber Membranes with High Thermal Stability

作　　者：徐汇 张培垣 徐娜娜 刘涛 张晓山 王兵 王应德[1] XU Hui;ZHANG Peiyuan;XU Nana;LIU Tao;ZHANG Xiaoshan;WANG Bing;WANG Yingde(Science and Technology and Composites Laboratory,College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学空天科学学院、新型陶瓷纤维及其复合材料重点实验室,长沙410073

出　　处：《材料研究学报》2024年第5期365-372,共8页Chinese Journal of Materials Research

基　　金：湖南省自然科学基金(2021JJ20048);重点实验室稳定支持科研项目(WDZC20235250501)。

摘　　要：将静电纺丝技术与先驱体转化法相结合,制备出耐高温(1300℃)性能较好的SiO_(2)/ZrO_(2)纳米纤维膜。这种SiO_(2)/ZrO_(2)-0.5纳米纤维由无定形SiO_(2)相和t-ZrO_(2)纳米晶组成,其平均直径为495.8±45.5 nm。SiO_(2)/ZrO_(2)-0.5纳米纤维膜具有较高的拉伸强度(4.88±0.27 MPa)、良好的柔性和优异的高温隔热性能,其1000℃热导率仅为0.167 W·m^(-1)·K^(-1),显著低于传统陶瓷隔热纤维膜。The high strength,high temperature resistance and high thermal shock resistance of ceram-ic nanofibers are essential to high temperature thermal insulation materials,which have good application prospects in aerospace and other fields.The low thermal conductivity and good infrared refractive index of ZrO_(2)nanofibers have attracted much attention in the field of thermal insulation.However,the poor thermal stability(≤1200℃)of ZrO_(2)nanofiber limits their utilization in the field of high-temperature thermal insulation.In this study,a novel membrane of SiO_(2)/ZrO_(2)-0.5 nanofibers(d=495.8±45.5 nm)with high temperature re-sistance up to 1300oC was prepared by combining electrospinning technology and preceramic polymer py-rolysis method,the SiO_(2)/ZrO_(2)-0.5 nanofiber composed of amorphous SiO_(2)phase and t-ZrO_(2)nanocrystal-line.The fabricated SiO_(2)/ZrO_(2)-0.5 nanofiber membrane shows high tensile strength(4.88±0.27 MPa),good flexibility and excellent thermal insulation performance at high temperatures.Finally,it is worth noting in particular that the thermal conductivity of SiO_(2)/ZrO_(2)-0.5 nanofiber membrane is only 0.167 W·m^(-1)·K^(-1)at 1000℃,which is significantly lower than those of the known traditional ceramic fiber membranes.

关 键 词：无机非金属材料 静电纺丝 SiO_(2)/ZrO_(2)纳米纤维膜 耐高温性能 隔热性能 

分 类 号：TQ343[化学工程—化纤工业]