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首页> 外文期刊>Journal of porous materials >Rigid silica xerogel/alumina fiber composites and their thermal insulation properties
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Rigid silica xerogel/alumina fiber composites and their thermal insulation properties

机译：刚性二氧化硅干凝胶/氧化铝纤维复合材料及其隔热性能

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摘要

Mechanically robust silica xerogel/alumina fiber composites were successfully prepared by a cost-effective ambient pressure drying route. Microstructure investigation shows that the alumina fibers embed into the silica xerogel matrix as reinforcements, which improves the strength of the composites greatly. As the alumina fibers volume increases to 4.0%, the compressive and flexural strength value of the composite is 0.96MPa and 2.53MPa, while the thermal conductivity at room temperature slightly changes between 0.051 and 0.059W/mK. The composite is hydrophobic and keeps water repellent until 300 degrees C as shown by the TG-DSC result. After being heated at 800 degrees C for 25min, the composite remains structurally intact demonstrated good thermal resistant property. The above characteristics indicate that the as prepared composite has great potential application as thermal insulation material in energy-saving area.
机译：机械强度高的二氧化硅干凝胶/氧化铝纤维复合材料是通过具有成本效益的环境压力干燥路线成功制备的。显微组织研究表明，氧化铝纤维作为增强剂嵌入二氧化硅干凝胶基质中，大大提高了复合材料的强度。当氧化铝纤维体积增加到4.0％时，复合材料的抗压强度和挠曲强度值为0.96MPa和2.53MPa，而室温下的导热系数在0.051和0.059W / mK之间略有变化。 TG-DSC结果表明，该复合材料是疏水性的，并保持防水直到300摄氏度。在800摄氏度下加热25分钟后，复合材料仍保持完整的结构，并表现出良好的耐热性。上述特性表明，所制备的复合材料在节能领域具有作为隔热材料的巨大潜力。

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  • 来源
    《Journal of porous materials》 |2019年第4期|1177-1184|共8页
  • 作者

    Li Junning; Wu Wenjun; Yang Hailong; Wang Xiaoting; Wang Xiaoyan; Sun Chencheng; Hu Zijun;

  • 作者单位

    Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composite Lab, Beijing 100076, Peoples R China;

    Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composite Lab, Beijing 100076, Peoples R China;

    Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composite Lab, Beijing 100076, Peoples R China;

    Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composite Lab, Beijing 100076, Peoples R China;

    Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composite Lab, Beijing 100076, Peoples R China;

    Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composite Lab, Beijing 100076, Peoples R China;

    Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composite Lab, Beijing 100076, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Silica xerogel; Composite; Alumina fiber; Thermal insulation; Mechanical property;

    机译：二氧化硅Xerogel;复合材料;氧化铝纤维;保温;机械性能;

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