%0 Journal Article
%A X X Jack Hu
%A Ravi S Prasher
%A Kelly Lofgreen
%B Appl. Phys. Lett.
%D 2007
%G eng
%I American Institute of Physics
%P 203113
%R 10.1063/1.2814959
%T Ultralow thermal conductivity of nanoparticle packed bed
%V 91
%X <p>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.</p>