(Aerospace Research Institute of Materials & Processing Technology, National Key Laboratory of Advanced Functional Composite Materials, Beijing 100076, China)
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DOI:
10.7502/j.issn.1674-3962.2012.08.05
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Abstract:
Nano porous superinsulation materials have ultrolow thermal conductivities, which depends on the micro/submicrometer porous structure. The macropore volume limitation is calculated and validated for silica aerogel of 002 W/m·K at 20 ℃ under atmosphere. SiO2Al2O3 nanoporous insulation materials with high thermal stability at 1 200 ℃ have been synthesized. The thermal conductivities have been tested and compared with the quartz lamp heater experiment results. The potential development of nanoporous superinsulation materials in future is also reviewed.