Advanced filter materials with high efficiency, low-pressure drop, and high-temperature resistance are urgently needed in the field of high-temperature gas filtration. Here, an Al₂O₃-stabilized ZrO₂ (ASZ) submicron fiber air filter paper with excellent flexibility and thermal stability (up to 1100 °C) is developed using a cost-effective, scalable solution blow spinning method and subsequent calcination. The ASZ papers demonstrate excellent flexibility and foldability, which can be attributed to the tetragonal phase and small crystallite size of the ASZ fibers due to the presence of Al₂O₃. In addition, the ASZ papers with an areal density of 56 mg cm^–2 show a high filtration efficiency (99.56%) and a low-pressure drop (108 Pa) for 15–615 nm NaCl particles at an airflow velocity of 5.4 cm s^–1. We envision that the foldable all-ceramic air filter material will provide a solution for the removal of particulate matter from the high-temperature exhaust gases.

中文翻译：

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具有高效和耐高温性能的可折叠全陶瓷空气滤纸。

在高温气体过滤领域，迫切需要具有高效率，低压降和耐高温性的先进过滤材料。在此，使用具有成本效益的，可扩展的溶液吹纺方法和随后的煅烧工艺开发了具有出色的柔韧性和热稳定性（最高1100°C）的Al ₂ O ₃稳定的ZrO ₂（ASZ）亚微米纤维空气滤纸。ASZ纸显示出优异的柔韧性和可折叠性，这归因于由于存在Al ₂ O ₃而导致的ASZ纤维的四方相和小晶粒尺寸。此外，ASZ纸的面密度为56 mg cm ^–2在5.4 cm s ^–1的气流速度下，对15–615 nm NaCl颗粒显示出高过滤效率（99.56％）和低压降（108 Pa）。我们设想可折叠的全陶瓷空气过滤器材料将为从高温废气中去除颗粒物提供解决方案。