工程科学学报2017，Vol.39Issue(6)：811-822,12.DOI:10.13374/j.issn2095-9389.2017.06.001
超级绝热型防火材料的研究进展及其在城市地下空间的应用展望
Status and development of fire protection materials based on super thermal insulator and their application prospect in urban underground space
陈德平 1侯柯屹 2王立佳 1张竞扬1
作者信息
- 1. 北京科技大学城市地下空间工程北京市重点实验室, 北京100083
- 2. 北京市建筑节能减排协同创新中心,北京100044
- 折叠
摘要
Abstract
Fire-protective super thermal insulator is an inorganic material with a nanopore structure and super-low thermal conduc-tivity. It can be classified as either a sol-gel aerogel-based composite or a fumed oxide-based composite. The matrix oxides are investi-gated from SiO2 to oxides with higher melting temperatures, including Al2 O3 or ZrO2 . It was found that the complex component oxides with the appropriate ratios exhibit better thermal stability than single oxide when exposed to fire. The infrared opacifier is a key compo-nent to this material that can significantly reduce its high-temperature thermal conductivity. The appropriate selection of opacifiers be-comes possible by determining the specific infrared extinction coefficient and performing a numerical calculation based on Mie scatter-ing theory. This fire protection material has high fireproof efficiency while also being very thin and is rated as having high fire resist-ance. With the development of ambient pressure drying for aerogel-based composite from supercritical drying, this fire protection mate-rial can be manufactured at low overall cost and will play an important role in passive fire protection systems in urban underground spaces.关键词
超级绝热型防火材料/气凝胶/气相法氧化物/红外遮光剂/城市地下空间Key words
fire protection material based on super-thermal insulator/aerogel/fumed oxide/infrared opacifier/urban under-ground space分类
建筑与水利引用本文复制引用
陈德平,侯柯屹,王立佳,张竞扬..超级绝热型防火材料的研究进展及其在城市地下空间的应用展望[J].工程科学学报,2017,39(6):811-822,12.
