Anisotropically Thermal‐Protective Porous Ceramics Enabled by Nacre‐Like Framework
Abstract
Abstract Ever more severe energy dilemma and unfulfilled demands for thermal protection applications have drawn a great interest in developing thermal protective materials. Though great progress is achieved by implementing several advanced micro‐architectures, the conflict between thermal insulation and mechanical properties, along with the complex manufacturing process, remains the main obstacles for fabricating ideal integrated thermal insulation materials. Here, a scalable nacre‐like porous ceramic is reported with a good combination of thermal insulation and mechanical strength (≈0.058 W m −1 K −1 , 22 MPa) via a bottom‐up film‐to‐bulk assembly. The well‐aligned microplatelets constructed the nacre‐like framework and produced porosity in between for thermal insulation while the mineral bridges between microplatelets connected and strengthened the whole framework. Besides, the structure‐induced anisotropy of thermal conductivity on out‐plane and in‐plane directions provides the possibilities for heat management. Moreover, this material shows an excellent fire‐resistance and maintained performance after fire. These structure‐induced integrated superiorities made this material good candidate for complex thermal protection applications.
Article Details
Authors (4)
Zhen‐Bang Zhang
Institute of Innovative Materials Department of Chemistry Department of Materials Science and Engineering Shenzhen Key Laboratory of Sustainable Biomimetic Materials Guangming Advanced Research Institute Southern University of Science and Technology Shenzhen 518055 China
Huai‐Ling Gao
CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern Mechanics University of Science and Technology of China Hefei Anhui 230027 China
Si‐Ming Chen
Department of Chemistry Division of Nanomaterials & Chemistry New Cornerstone Science Laboratory Institute of Biomimetic Materials & Chemistry Anhui Engineering Laboratory of Biomimetic Materials Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei 230026 China
Shu‐Hong Yu
New Cornerstone Science Laboratory Department of Chemistry Institute of Biomimetic Materials and Chemistry Anhui Engineering Laboratory of Biomimetic Materials Division of Nanomaterials and Chemistry Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei 230026 China