title: Insights into the flexibility of ZrMxOy (M = Na, Mg, Al) nanofibrous membranes as promising infrared stealth materials.
abstract: A surprising brittle to flexible transition in ZrMxOy (M = Na, Mg, Al) nanofibrous membranes was found by varying the undersized dopant species and content. The fiber morphology, crystalline structure, and pore structure of the ZrMxOy nanofibrous membranes can be significantly modulated by varying the dopant valence from +1 to 3 and the dopant content from 1 to 20 mol%, respectively. Meanwhile, a classical Hall-Petch effect was revealed for the ZrMxOy nanofibrous membranes systems, which corresponded to a nanocrystalline size of 22.8 nm and an enhanced flexibility of 23 mN. Moreover, the substitutional solid solution and interstitial solid solution dissolution processes of Na, Mg, and Al into ZrO2 were analyzed using vacancy compensation and dopant interstitial compensation mechanisms, respectively. Most importantly, the flexible Al doped zirconia nanofibrous membranes exhibit a low infrared emissivity of 0.589 and 0.703 in the 3-5 μm and 8-14 μm wavebands, respectively, which suggests them to be a promising candidate for infrared stealth materials in the confrontation strategy field for personnel, aircraft, missiles, satellites, etc.
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China. binding@dhu.edu.cn.
authors.forename: Xue
authors.initials: X
authors.lastname: Mao
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China. binding@dhu.edu.cn.
authors.forename: Ying
authors.initials: Y
authors.lastname: Bai
authors.affiliation: Nanofibers Research Center, Modern Textile Institute, Donghua University, Shanghai 200051, China.
authors.forename: Jianyong
authors.initials: J
authors.lastname: Yu
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China. binding@dhu.edu.cn and Nanofibers Research Center, Modern Textile Institute, Donghua University, Shanghai 200051, China and Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Ding