Duocell Aluminum Foam is the best heat exchanger. Open-celled aluminum foam has a high strength-to-weight ratio and a large surface area to volume ratio.
Features
Duocel is ideal material for gas diffusers/mixers, liquid/gas separators, impact absorbers and compact heat exchangers. Products in10, 20 and 40 ppi porosity are available (ppi = pores per linear inch).