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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Xerogel /氧化铝纤维复合材料及其绝热性能

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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：通过经济高效的环境压力干燥路线成功制备机械鲁棒硅氧化硅/氧化铝纤维复合材料。微观结构研究表明，氧化铝纤维嵌入二氧化硅Xerogel基质中作为增强件，这大大提高了复合材料的强度。随着氧化铝纤维的体积增加到4.0％，复合材料的压缩和弯曲强度值为0.96MPa和2.53MPa，而室温下的导热率略微变化0.051和0.059W / mk。复合材料是疏水性的，使防水剂保持在300摄氏度，如TG-DSC结果所示。在800℃加热25mIn后，复合材料仍然是结构性完整，证明了良好的热阻性。上述特性表明，作为制备的复合材料具有巨大的潜在应用，作为节能区域中的隔热材料。

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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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