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首页> 外文会议>ICTAP 2012 >Thermal Expansion Coefficient Prediction of Fuel-Cell Seal Materials from Silica Sand
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Thermal Expansion Coefficient Prediction of Fuel-Cell Seal Materials from Silica Sand

机译：硅砂燃料电池密封材料的热膨胀系数预测

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This study is focused on the prediction of coefficient of thermal expansion (CTE) of silica-sand-based fuelcell seal materials (FcSMs) which in principle require a CTE value in the range of 9.5-12 ppm/°C. A semi-quantitative theoretical method to predict the CTE value is proposed by applying the analyzed phase compositions from XRD data and characterized density-porosity behavior. A typical silica sand was milled at 150 rpm for 1 hour followed by heating at 1000 °C for another hour. The sand and heated samples were characterized by means of XRD to perceive the phase composition correlation between them. Rietveld refinement was executed to investigate the weight fraction of the phase contained in the samples, and then converted to volume fraction for composite CTE calculations. The result was applied to predict their potential physical properties for FcSM. Porosity was taken into account in the calculation after which it was directly measured by the Archimedes method.
机译：该研究集中于预测二氧化硅砂燃料密封材料（FCSMS）的热膨胀系数（CTE），其原则上需要9.5-12ppm /℃的CTE值。通过施用来自XRD数据的分析的相组合物和表征密度 - 孔隙率行为来提出了一种预测CTE值的半定量理论方法。将典型的二氧化硅砂以150rpm研磨1小时，然后在1000℃下加热另一个小时。通过XRD表征砂和加热的样品，以感知它们之间的相位组成相关性。执行RIETVELD细化以研究样品中所含相的重量分数，然后转化为复合CTE计算的体积分数。结果用于预测其FCSM的潜在物理性质。在计算中考虑了孔隙率，之后通过Archimedes方法直接测量。

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