Thermal conductivity of traditional ceramics. Part I: Influence of bulk density and firing temperature
Thermal conductivity of traditional ceramics. Part I: Influence of bulk density and firing temperature
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DOI：
10.1016/j.ceramint.2010.05.012
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发表时间：
2010-08
影响因子：
5.2
通讯作者：
J. Ten;M. Orts;A. Saburit;G. Silva
中科院分区：
文献类型：
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作者：
J. Ten;M. Orts;A. Saburit;G. Silva
已知传统陶瓷的热导率是其孔隙率或体积密度的函数。然而，在某些研究中，特别是当涉及工业加工砖的数据时，热导率-体积密度数据的分散表明，热导率除孔隙率外，还取决于其他特性，如相组成、微观结构、湿度或可溶性盐的存在。在这项研究中使用了一种用于制砖的红烧粘土，以期系统化可能影响导热性和机械强度的不同变量的影响。这第一篇论文介绍了当修改了这些块的干体积密度和它们的烧制温度时所获得的结果。据证实，热导率不仅取决于总孔隙率的烧制件，但需要考虑的孔径分布和孔隙互连性，这取决于所获得的烧制程度，也可能受到影响的阶段中存在的块，其含量和/或组成可能会随着烧制温度而变化。
The thermal conductivity of traditional ceramics is known to be a function of their porosity or bulk density. However, the scatter in the thermal conductivity–bulk density data in certain studies, particularly when data from industrially processed brick are involved, suggests that thermal conductivity depends, apart from porosity, on other characteristics such as phase composition, microstructure, humidity or the presence of soluble salts. A red-firing clay used in brick manufacture has been used in this study with a view to systematising the impact of the different variables that could influence thermal conductivity and mechanical strength. This first paper presents the results obtained when the dry bulk density of the pieces and their firing temperature were modified. It was confirmed that thermal conductivity did not solely depend on the total porosity of the fired pieces, but that pore size distribution and pore interconnectivity need to be considered, which depend on the degree of firing attained, and may also be influenced by the phases present in the pieces, whose content and/or composition could vary with firing temperature.