Nano-porous super thermal insulation composites are an important component in refractory and play a key role in energy-saving. In this work, we adopt dry preparation technology and high-temperature sintering and use nano-Al₂O₃ and nano-SiO₂ as the main materials to prepare nano-Al₂O₃/SiO₂-based composites for a range of performance characterization. According to this study, the as-prepared nano-Al₂O₃/SiO₂-based composites exhibited a high porosity (77.4%–89.6%) and a low thermal conductivity (.06–.134 W/(m k) at 200–800°C). The most striking finding of this study was the nanostructure that was successfully constructed in nano-Al₂O₃/SiO₂-based composites and exhibited a well hierarchical aperture distribution. The as-prepared nano-Al₂O₃/SiO₂-based composites could be widely applied in energy-saving and heat preservation applications.

中文翻译：

---

新型纳米Al2O3/SiO2基节能复合材料的制备与表征

纳米多孔超绝热复合材料是耐火材料中的重要组成部分，在节能方面发挥着关键作用。在这项工作中，我们采用干法制备技术和高温烧结，以纳米Al ₂ O ₃和纳米SiO ₂为主要材料，制备了具有一系列性能的纳米Al ₂ O ₃ /SiO ₂基复合材料。表征。根据本研究，所制备的纳米 Al ₂ O ₃ /SiO ₂基复合材料表现出高孔隙率 (77.4%–89.6%) 和低热导率 (.06–.134 W/(m·k) 在 200–800°C)。这项研究最引人注目的发现是在纳米 Al ₂ O ₃ /SiO ₂基复合材料中成功构建的纳米结构，并表现出良好的分层孔径分布。所制备的纳米Al ₂ O ₃ /SiO ₂基复合材料可广泛应用于节能和保温领域。