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Effects of pore structure on thermal conductivity and strength of alumina porous ceramics using carbon black as pore-forming agent

机译：孔结构对以炭黑为成孔剂的氧化铝多孔陶瓷导热系数和强度的影响

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摘要

In the present work, carbon black (CB) works as a pore-forming agent in the preparation of alumina porous ceramics. The pore structures (i.e. mean pore size, pore size distribution and various pores size proportions) were characterized by means of Micro-image Analysis and Process System (MIAPS) software and mercury intrusion porosimetry. Then their correlation and thermal conductivity as well as strength were determined using grey relation theory. The results showed that the porosity and mean pore size increased against the amount of CB, whereas the thermal conductivity, cold crushing strength and cold modulus of rupture reduced. The < 2 mu m pores were helpful for enhancing the strength and decreasing the thermal conductivity whereas the > 14 mu m pores had the opposite effects. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
机译：在目前的工作中，炭黑（CB）在制备氧化铝多孔陶瓷中用作造孔剂。孔结构（即平均孔径，孔径分布和各种孔径比例）通过微图像分析和处理系统（MIAPS）软件和压汞法进行表征。然后使用灰色关联理论确定它们的相关性，导热性以及强度。结果表明，孔隙率和平均孔径随CB含量的增加而增加，而导热系数，冷抗碎强度和冷断裂模量降低。 <2μm的孔有助于增强强度并降低导热系数，而> 14μm的孔则相反。 （C）2016 Elsevier Ltd和Techna Group S.r.l.版权所有。

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