Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian. It occurs naturally and has the unusual property of greatly expanding when heated sufficiently. Perlite softens when it...

Perlite are used to masonry construction, cement, and gypsum plasters and loose-fill insulation.

Expanded perlite is a kind of white granular material with honeycomb structure inside which is made of perlite ore after preheating and instant high temperature roasting and expanding. The principle is: perlite ore is crushed to form ore sand of a...