Thermal insulating and fire-retardant Si_(3)N_(4) nanowire membranes resistant to high temperatures up to 1300℃
作者机构：State Key Laboratory of Solidification ProcessingShaanxi Key Laboratory of Fiber Reinforced Light Composite MaterialsNorthwestern Polytechnical UniversityXi’an 710072China
出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)
年 卷 期：2023年第155卷第24期
页 面：82-88页
核心收录：
学科分类：0907[农学-林学] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化]
基 金：financially supported by the National Natural Science Foundation of China(Grant No.51872232) the Research Fund of the State Key Laboratory of Solidification Processing(NWPU),China(Grant No.136-QP-2015) the Key Scientific and Technological Innovation Research Team of Shaanxi Province(No.2022TD-31) the Key R&D Program of Shaanxi Province(No.2021ZDLGY14-04) the National Training Program of Innovation and Entrepreneurship for Undergraduates(Grand No.XN2022023) the Joint Funds of the National Natural Science Foundation of China(Grant No.U21B2067)
主 题：Silicon nitride nanowires Thermal insulation Fire-resistance High-temperature resistance
摘 要：Superior thermal insulating and fire-retardant ceramic membranes are urgently demanded in the aerospace,construction,and chemical engineering ***,the generic characteristics of ceramic membranes,such as brittleness,structural collapse,and crystallization-induced pulverization behavior,present a great plague to their practical ***,we report a highly flexible,mechanically stable,fire-retardant,and high-temperature-resistant ceramic membrane based on the interlocked Si_(3)N_(4) nanowires formed by the precursor pyrolysis *** Si_(3)N_(4) nanowire membrane(SNM)has excellent high-temperature resistance under alcohol lamps and butane spray *** thermal insulation with a thermal conductivity as low as 0.056 W m^(-1)K^(-1)can be attributed to the high porosity of SNM,which makes it a desirable candidate for heat insulators under harsh *** importantly,SNM exhibits thermal stability and robust mechanical properties in the range of 25 to 1300℃.The high-temperature resistance of SNM up to 1300℃is achieved by the four stages:Si3 N4 nanowires,Si_(3)N_(4)@SiO_(2) nanowires,SiO_(2) nanowires,and bead-like SiO_(2) *** heat-treated at 1300℃,the macroscopic size of SNM does not change significantly,and the interlocked structure is still ***,SNM still maintains excellent mechanical properties,with tensile strength as high as 0.26 *** work provides a facile method for fabricating excellent thermal insulating and fire-retardant ceramic membranes,showing prospective application prospects in the era of thermal insulating materials.
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