Thermal Insulation Performance of Nanoporous Alumina Compact

摘要：

　　High performance thermal insulation materials are highly demanded for the ever-increasing requirement for reducing energy consumption over the world.Nanoporous insulators with ultra-low thermal conductivity have drawn significant attention in the last decade.The article presents the synthesis of the nanoporous alumina compact and its thermal insulation properties.SEM was adopted to characterize the nanostructure of the porous alumina compact.Thermal conductivity of the synthesized material under different temperature and pressure was measured by the transit hot plane method.It was found that the nanoporous alumina compact had high porosity and the pore size was in the nano range,which greatly reduced the gaseous heat transfer.The thermal conductivity of the synthesized material was0.029 W/(m · K) at ambient temperature and l05 Pa,and decreased to 0.005 W/(m · K) with the gas pressure reducing to 10 Pa.The nanoporous alumina compact exhibits good thermal insulation performance and may have a future as a good thermal insulation material.

关键词： thermal conductivity nanoporous alumina insulator

作者: Li Junning Fan Yu Yang Hailong Yang Jingxing Hu Zijun

作者单位: National Key Laboratory of Advanced Functional Composite Materials, Aerospace Research Institute of China Academy of Launch Vehicle Technology, Beijing, 100076, P.R.China

会议类型: 国际会议

会议名称: The 12th International Vacuum Insulation Symposium (IVIS 2015)(第十二届国际真空绝热材料会议)

会议地点: 南京

会议语种:英文

页码: 307-310

在线出版日期: 2015-09-01（万方平台首次上网日期，不代表论文的发表时间）