Morphological Characterization of Ceramic Sponges for Applications in Chemical Engineering
Morphological Characterization of Ceramic Sponges for Applications in Chemical Engineering
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DOI：
10.1021/ie900651c
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发表时间：
2009-12-02
影响因子：
4.2
通讯作者：
Kraushaar-Czarnetzki, Bettina
中科院分区：
文献类型：
--
作者：
Grosse, Julia;Dietrich, Benjamin;Kraushaar-Czarnetzki, Bettina
对不同材料的陶瓷海绵结构的形态参数、孔隙率和每线性英寸（ppi）孔数进行了广泛的研究。磁共振成像（MRI）和x射线断层扫描（CT）测量的体积图像分析进行了实验，以确定结构的几何比表面积。此外，通过常规方法，包括光学显微镜、汞孔隙度测定法和氦密度测定法，评估了表面和支柱的直径、孔隙度和密度。结果数据被用来评价形态模型表示不规则的支撑网络的包装规则多面体。在Weaire-Phelan模型的基础上，开发了一种新的相关性，可以高精度地计算海绵的比表面积。这种相关性的输入参数很容易通过标准显微镜和孔隙度测量获得。
An extensive study on morphological parameters of ceramic sponge structures of different material, porosity, and pores per linear inch (ppi) number was performed. Volume image analyses of magnetic resonance imaging (MRI) and X-ray tomography (CT) measurements were carried out to determine experimentally the geometric specific surface area of the structures. Furthermore, face and strut diameters, porosities, and densities were assessed through conventional methods including optical microscopy, mercury porosimetry, and helium pycnometry. The resulting data were used to evaluate morphological models representing the irregular strut network by packings of regular polyhedra. On the basis of an adapted Weaire-Phelan model, a novel correlation was developed that enables the calculation of the specific surface area of sponges with high accuracy. The input parameters for this correlation are easily accessible by standard microscopy and porosimetry measurements.