Heat conductivity

Thermal conductivity of the expanded vermiculite is mainly determined by its grain composition and volume bulk density. Characteristically, the grain structure has a greater effect on thermal conductivity than bulk bulk density. Large vermiculite easily oriented perpendicular to heat flow and "^ " is much better than an undirected. Grains smaller than 1.2 mm practically oriented. To approximate the thermal conductivity of vermiculite in the dry state at normal temperature, you can use the following formula: