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首页> 外文期刊>Materials Science and Engineering >The enhanced thermal and mechanical properties of graphite foams with a higher crystallinity and apparent density
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The enhanced thermal and mechanical properties of graphite foams with a higher crystallinity and apparent density

机译：具有更高结晶度和表观密度的增强的石墨泡沫的热和机械性能

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摘要

Graphite powder, which has a highly graphitic structure, is used as filler material in the preparation of graphite foams (GFms) and enhances the foams' thermal-mechanical properties. GFms are prepared using the hydrogel template method with mesophase pitch, polyvinyl alcohol-acrylic acid (PVA-AAc) solution and graphite powder. GFms containing 0.3 w/w% added graphite exhibit as much as an 11.18% increase in crystalline thickness (Lc) compared to that of the sample without graphite powder. These increased crystalline thicknesses of GFms result in thermal conductivity increases as high as 59.30%. Furthermore, the compressive strength is increased by as much as 120.52% compared to that of the sample without graphite powder, and the apparent density is increased by as much as 4.05%. The average pore size of the GFms is controlled by the amount of graphite powder, which affects the GFms' cell growth mechanism. These results revealed that the thermal-mechanical properties of GFms containing graphite powder with a highly graphitic structure were strongly affected by the GFms' crystalline thickness and apparent density.
机译：具有高度石墨结构的石墨粉在制备石墨泡沫（GFms）中用作填充材料，并增强了泡沫的热机械性能。使用水凝胶模板法，中间相沥青，聚乙烯醇-丙烯酸（PVA-AAc）溶液和石墨粉制备GFms。与不含石墨粉末的样品相比，含有0.3 w / w％的石墨的GFms的晶体厚度（Lc）增长高达11.18％。 GFms的这些增加的晶体厚度导致热导率增加高达59.30％。此外，与无石墨粉末的样品相比，其抗压强度提高了120.52％，表观密度也提高了4.05％。 GFms的平均孔径受石墨粉量的控制，这会影响GFms的细胞生长机制。这些结果表明，含有高石墨结构石墨粉的GFms的热机械性能受到GFms的晶体厚度和表观密度的强烈影响。

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  • 来源
    《Materials Science and Engineering》 |2017年第1期|174-181|共8页
  • 作者

    Ji-Hyun Kim; Hyung-Ik Lee; Young-Seak Lee;

  • 作者单位

    Department of Chemical Engineering and Applied Chemistry, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejeon 34134, Republic of Korea;

    Department of Chemical Engineering and Applied Chemistry, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejeon 34134, Republic of Korea,The 4th R&D lnstitute-4, Agency for Defense Development, Daejeon 34186, Republic of Korea;

    Department of Chemical Engineering and Applied Chemistry, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejeon 34134, Republic of Korea;

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  • 正文语种 eng
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  • 关键词

    Graphite foams; Fillers; X-ray diffraction; Compressive strength; Thermal conductivity;

    机译：石墨泡沫;填充物;X射线衍射;抗压强度;导热系数;

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