Flakes of raw vermiculite concentrate are micaceous in appearance and contain interlayer water in their structure.When the flakes are heated rapidly at a temperature above 870 °C,the water flashes into steam,and the flakes expand into accordionlike particles.This process is called exfoliation, or expansion, and the resulting lightweight material is chemically inert, fire resistant, and odorless.
Size: 0.3-1mm, 0.7-2mm, 1.2-3.5mm, 2-4mm, 3-6mm, 4-8mm
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