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首页> 外文期刊>Journal of the American Ceramic Society >Percolation in Borosilicate Glass Matrix Composites Containing Antimony-Doped Tin Oxide Segregated Networks. Part Ⅰ: Fabrication of Segregated Networks
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Percolation in Borosilicate Glass Matrix Composites Containing Antimony-Doped Tin Oxide Segregated Networks. Part Ⅰ: Fabrication of Segregated Networks

机译：含锑掺杂氧化锡偏析网络的硼硅酸盐玻璃基复合材料的渗滤。第一部分：隔离网络的制作

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摘要

The percolation threshold in a composite depends on the processing conditions used to fabricate it along with the size and shape of the filler and the matrix. In this study, borosilicate glass microspheres were used as the matrix material, and nanosized antimony tin oxide (ATO) particles were used as the filler. The glass microsphere/ATO composites were fabricated by hot pressing at temperatures in the range between the glass transition temperature and the softening temperature of the glass to control the viscosity. The pressure and temperature applied allowed the ATO to be confined to the spaces between certain glass particles, forming percolating networks at low volume fractions of the ATO. The viscous flow of the glass allowed for the composite to have near full densities, while allowing for the nanoparticle segregation to occur. Even though apparently similar microstructures were made using different heating schedules, the percolation behavior and electrical conductivity showed noticeable differences. The percolation threshold ranged from 0.1 to 2.5 phr (parts per hundred glass) and the change in electrical conductivity was around seven to nine orders of magnitude. The differences were attributed to the interaction of the segregated ATO particles with one another. The electrical properties were examined using ac impedance spectroscopy along with current atomic force microscopy (C-AFM), which allowed for valuable insights in the structure-property-processing relationships in these materials.
机译：复合材料中的渗透阈值取决于制造条件以及填料和基质的尺寸和形状。在这项研究中，硼硅酸盐玻璃微球用作基质材料，纳米级氧化锡锑（ATO）颗粒用作填料。通过在玻璃化转变温度和玻璃的软化温度之间的范围内的温度下热压以控制粘度来制造玻璃微球/ ATO复合物。施加的压力和温度使ATO限于某些玻璃颗粒之间的空间，从而在ATO的体积分数低时形成了渗滤网络。玻璃的粘性流动使得复合物具有接近全密度，同时允许发生纳米颗粒偏析。即使使用不同的加热程序制成了明显相似的微结构，其渗透行为和电导率也显示出明显的差异。渗滤阈值范围为0.1至2.5 phr（每百份玻璃份），电导率变化约为7至9个数量级。差异归因于分离的ATO颗粒之间的相互作用。使用交流阻抗谱以及当前的原子力显微镜（C-AFM）检查了电性能，这为这些材料的结构-特性-加工关系提供了宝贵的见解。

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  • 来源
    《Journal of the American Ceramic Society》 |2013年第11期|3544-3551|共8页
  • 作者

    Timothy L. Pruyn; Rosario A. Gerhardt;

  • 作者单位

    School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive,Atlanta, Georgia 30332-0245;

    School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive,Atlanta, Georgia 30332-0245;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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