The Properties Study of New Ultra-temperature Vacuum Insulation Composites
With regards to the adiabatic principle for insulation,a new ultra-temperature vacuum insulation composites (UT-VIC) is put forward,which can be used in high temperature environment.Carbon fiber reinforced carbon composites have excellent high temperature resistance,high toughness,corrosion resistance and good thermal stability,etc.SiO2 can be used to fill the microcrack and protect the carbon matrix from oxidizing.This material consist of a core material which is SiC foam ceramic and a flawless outer shell layer of carbon fiber reinforced composites by the methods of CVI (Chemical Vapor Infiltration) and silica sol vacuum impregnation,while maintaining a vacuum state inside.So the new ultra-temperature vacuum insulation composites with novel structure not only can be used at high temperature,but also has a very low coefficient of thermal conductivity compared with C/C and C/SiC composites.Material density is 0.81g/em3,the effective thermal conductivity of UT-VIC ranged from 0.193W/(m · K) to 0.721W/(m · K) in 303K to 724K temperature,and the compression strength is 1.5 MPa.The aim nf this paper is to investigate and analyze the effect of material structures and presents a possible future high temperature resistance vacuum insulation material.
vacuum insulation thermal conductivity
Wang Yang Chen Zhaofeng Yu Shengjie
Suzhou Superlong Aeronautical Heat-resistance Materials Co.Ltd., Taicang, 215400, P.R.China;Super In Super Insulation Composite Laboratory, College of Materials Science and Technology, Nanjing Universi
国际会议
The 12th International Vacuum Insulation Symposium (IVIS 2015)(第十二届国际真空绝热材料会议)
南京
英文
236-240
2015-09-01（万方平台首次上网日期，不代表论文的发表时间）