Bulk composition and microstructure dependence of effective thermal conductivity of porous inorganic polymer cements

被引：162

作者：

Kamseu, E. ^{[1
]}

Nait-Ali, B. ^{[2
]}

Bignozzi, M. C. ^{[3
]}

Leonelli, C. ^{[1
]}

Rossignol, S. ^{[2
]}

Smith, D. S. ^{[2
]}

机构：

[1] Univ Modena & Reggio Emilia, Dept Mat & Environm Engn, I-41125 Modena, Italy

[2] Ctr Eurapeen Ceram, Grp Etud Mat Heterogenes, F-87068 Limoges, France

[3] Univ Bologna, Dept Civil Environm & Mat Engn, I-40131 Bologna, Italy

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2012年 / 32卷 / 08期

关键词：

Thermal conductivity; Porosity; Inorganic polymer cements; Microstructure-final; Composites; MERCURY POROSIMETRY; GEOPOLYMERS;

D O I：

10.1016/j.jeurceramsoc.2011.12.030

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Experimental results and theoretical models are used to assess the effective thermal conductivity of porous inorganic polymer cements, often indicated as geopolymers, with porosity between 30 and 70 vol.%. It is shown that the bulk chemical composition affects the microstructure (grains size, pores size, spatial arrangement of pores, homogeneity, micro cracks, bleeding channels) with consequently the heat flow behaviour through the porous matrix. In particular, introduction of controlled fine pores in a homogeneous matrix of inorganic polymer cements results in an increase of pore volume and improvement of the thermal insulation. The variation of the effective thermal conductivity with the total porosity was found to be consistent with analytical models described by Maxwell-Eucken and Landauer. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：1593 / 1603

页数：11

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