Ultralow thermal conductivity of nanoparticle packed bed
2007
We show that thermal conductivity of packed bed of alumina nanoparticles can be as low as 0.035W∕mK which is only 35% higher than the thermal conductivity of air and is smaller than the recently reported lowest thermal conductivity of solids using disordered layered WeS2. These findings show a promising approach for making low-cost and ultralow thermal conductivity thermal insulation materials with high density and good sustainability at high pressures.
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