The Effect of Rice Husk Ash on the Performance of VIP Core Materials
The rice husk ash (RHA) contains over 70% of silica in an amorphous form and a lot of applications is being developed for it all over the world.Mixtures with different kinds of powders and fibers can be fabricated into wet-laid mat by wet method and the properties of suspension influences the performance of the resulting wet-laid mat.In this paper,10wt%,20wt%,30wt%,40wt% and 50wt% addition of RHA were mixed with glass wool with 30% centrifugal glass wool (CGW) and 70% flame attenuated glass wool (FAGW) in cylindrical container and were beaten by 5000 revolutions for uniform distribution.Among them,RAH was used as filler material since it contributes significantly to the reduction of production cost of the VIPs and help to save energy and protect the environment.Beating degree,drainage time and physical stability of the suspension were investigated.In order to evaluate the physical stability of the hybrid suspension,sedimentation of RHA in the suspension was also observed.Experimental results show that the beating degree of hybrid suspension decreased dramatically with the mass fraction of RHA.The addition of RHA resulted in a highly unstable state of the suspension.Physical properties of the wet-laid mat and thermal conductivity of the as-prepared VIP will be analyzed in the coming days.
rice husk ash vacuum insulation panel core materials thermal conductivity beating degree
Guan Shengnan Chen Zhaofeng Li Chengdong
Super Insulation Composite Laboratory, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R.China
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
27-30
2015-09-01（万方平台首次上网日期，不代表论文的发表时间）