Effective Thermal Conductivity Analysis of Xonotlite-aerogel Composite Insulation Material

• 来源期刊: 热科学学报（英文版）
• 年，卷（期）: 2009,（2）
• 页码范围: 142-149
• 页数: 8页
• 语种: 英文
• DOI: 10.1007/s11630-009-0142-1

摘要

A 3-dimensional unit cell model is developed for analyzing effective thermal conductivity of xonotlite-aerogel composite insulation material based on its microstructure features. Effective thermal conductivity comparisons between xonotlite-type calcium silicate and aerogel as well as xonotlite-aerogei composite insulation material are presented. It is shown that the density of xonotlite-type calcium silicate is the key factor affecting the effective thermal conductivity of xonotlite-aerogel composite insulation material, and the density of aerogel has tittle in-fluence. The effective thermal conductivity can be lowered greatly by composite of the two materials at an ele-vated temperature.