@Article{icces.2024.012576,
AUTHOR = {Yeye Liu, Leilei Zhang, Ruonan Zhang, Siqi Shao, Lina Sun, Xinyi Wan, Tiantian Wang},
TITLE = {Thermal Insulating and Fire Retardant Si<sub>3</sub>N<sub>4</sub> Nanowires Membranes Resistant to High-Temperatures up to 1300 °C},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {30},
YEAR = {2024},
NUMBER = {2},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v30n2/58553},
ISSN = {1933-2815},
ABSTRACT = {Superior thermal insulating and fire-retardant ceramic membranes are urgently demanded in the aerospace, construction and chemical engineering industries. However, the generic characteristics of ceramic membranes, such as brittleness, structural collapse and crystallization-induced pulverization behavior, present a great plague to their practical applications. Herein, we report a highly flexible, mechanically stable, fire retardant and high-temperature-resistant ceramic membrane based on the interlocked Si<sub>3</sub>N<sub>4</sub> nanowires formed by the precursor pyrolysis method. The Si<sub>3</sub>N<sub>4</sub> nanowires membrane (SNM) has excellent high temperature resistance under alcohol lamp and butane spray lance. The thermal insulation with a thermal conductivity as low as 0.056 W/(mK) can be attributed to the high porosity of SNM, which makes it a desirable candidate for heat insulators under harsh conditions. More importantly, SNM exhibits thermal stability and robust mechanical properties in the range of 25 °C to 1300 °C. The high-temperature resistance of SNM up to 1300 °C is achieved by the four stages: Si<sub>3</sub>N<sub>4</sub> nanowires, Si<sub>3</sub>N<sub>4</sub>@SiO<sub>2</sub> nanowires, SiO<sub>2</sub> nanowires and bead-like SiO<sub>2</sub> nanowires. After heat-treated at 1300 °C, the macroscopic size of SNM does not change significantly, and the interlocked structure is still maintained. Furthermore, SNM still maintains excellent mechanical properties, with a tensile strength as high as 0.26 MPa. This work provides a facile method for fabricating excellent thermal insulation and flame-retardant ceramic membranes, showing prospective application prospects in the era of thermal insulation materials.},
DOI = {10.32604/icces.2024.012576}
}