Expanded vermiculite is made from raw vermiculite by high temperature expansion at 900-1000 ℃, and the expansion rate is 4-15 times. Expanded vermiculite is a layered structure with crystal water between layers. It has low thermal conductivity and bulk density of 80-200kg / m3. It is a good thermal insulation material. Good quality expanded vermiculite * * can be used at 11000C. In addition, expanded vermiculite has good electrical insulation.

　　Expanded vermiculite is widely used in thermal insulation materials, fireproof materials, seedling, flower planting, tree planting, friction materials, sealing materials, electrical insulation materials, coatings, plates, paints, rubber, refractories, hard water softeners, smelting, construction, shipbuilding, chemical and other industries.