... media,ceramic honeycombs ,materials are mainly utilized in heat recovery unit of RTO 40X40 ChannelsChemical composition (WT%)chemical componentsAlumina ... ³920 832860670680lb/ft³57.5 51,953,741.942,5Average heat Expansion coefficient10-6 K-16,26,23,53,44,810 ... -6 °F-13,43,41,941,892,7Specific heat capacityJ / kgK9509989421016850BTU/lb°F0,2270,2380,2210,2430,203Heat conductivityW ...