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.
BT - Appl. Phys. Lett. DO - 10.1063/1.2814959 LA - eng M1 - 20 N2 -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.
PB - American Institute of Physics PY - 2007 EP - 203113 T2 - Appl. Phys. Lett. TI - Ultralow thermal conductivity of nanoparticle packed bed VL - 91 ER -