The thermal conductivity of a material is the ability to conduct heat through the material itself, expressed by the thermal conductivity. The smaller the value of thermal conductivity, the better the insulation performance of the material. Thermal conductivity is an important index to evaluate thermal insulation performance of materials.
Different building materials have different thermal insulation properties. Materials with good thermal insulation properties are often porous. Different building materials have different thermal insulation performance, the main index to measure the thermal insulation performance of materials is thermal conductivity