Thermal conductivity of high porosity alumina refractory bricks made by a slurry gelation and foaming method
By Toru Shimizu, Kazuhiro Matsuura, H. Furue, Kunio Matsuzak. 2013
198 citations recorded by the source corpus.
Alumina has high heat resistance and corrosion resistance compared to other ceramics such as silica or mullite. However, for its application to refractory bricks, its high thermal conductivity must be reduced. To reduce this thermal conductivity by increasing the porosity, a GS (gelation of slurry) method that can produce high porosity solid foam was applied here to produce the alumina refractory brick. This method was successfully applied to produce alumina foam with high porosity and thermal conductivity of the foam is evaluated. At room temperature, the thermal conductivity was about 0.12 W/mK when the foam density was 0.1 g/cm 3 . At elevated temperature above 783 K, thermal conductivity of the foam was strongly affected by heat radiation and increased with increasing temperature, in contrast to the thermal conductivity of alumina itself, which decreased with increasing temperature. The alumina foams developed here achieved sufficient thermal insulating properties for use in refractory bricks. © 2013 The Authors. Published by Elsevier Ltd. All rights reserved.
Subfields: Building and Construction, Ceramics and Composites, Computational Mechanics
View Paper: https://www.semanticscholar.org/paper/69945c5df289ac6cc37239f3c76cb9ae77bf63fa
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In Building and Construction
Citations in the corpus
- Traditional, state-of-the-art and renewable thermal building insulation materials: An overview (2019, methodology): “Shimizu et al. [72] used the gelation of slurry (GS) method to successfully produce the alumina foams with porosity from 94 to 98%, which can be used as refractory bricks.”