perlite insulation

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• 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.Properties and usesWhen it… …   Wikipedia

• perlite — [pʉr′līt΄] n. [Fr < perle,PEARL1] 1. Geol. a greenish volcanic glass, similar to obsidian, with a pearly luster and multiple, minute concentric cracks, used as insulation and in making concrete, plaster, etc. 2. PEARLITE perlitic [pər lit′ik]… …   English World dictionary

• perlite — perlitic /perr lit ik/, adj. /perr luyt/, n. Petrog. a volcanic glass in which concentric fractures impart a distinctive structure resembling masses of small spheroids, used as a plant growth medium. Also, pearlite. [1825 35; < F; see PEARL1,… …   Universalium

• perlite — [ pə:lʌɪt] noun a form of obsidian consisting of glassy globules, used as thermal insulation or in plant growth media. Origin C19: from Fr., from perle pearl …   English new terms dictionary

• perlite — n. (also pearlite) a glassy type of vermiculite, expandable to a solid form by heating, used for insulation etc. Etymology: F f. perle pearl …   Useful english dictionary

• Loose Fill Insulation —   Insulation made from rockwool fibers, fiberglass, cellulose fiber, vermiculite or perlite minerals, and composed of loose fibers or granules can be applied by pouring directly from the bag or with a blower …   Energy terms

• Building insulation materials — A selection of insulation materials can aid in building insulation. All of these are based on standard principles of thermal insulation. Materials used to reduce heat transfer by conduction, radiation or convection are employed in varying… …   Wikipedia

• Thermal insulation — The term thermal insulation can refer to materials used to reduce the rate of heat transfer, or the methods and processes used to reduce heat transfer.Heat energy can be transferred by conduction, convection, radiation or when undergoing a phase… …   Wikipedia

• Knauf Insulation — Knauf Gips KG Unternehmensform Kommanditgesellschaft Gegründet 1932 Firmensitz Iphofen, Deutschland …   Deutsch Wikipedia

• composite board insulation — noun A rigid board insulation generally comprised of perlite or wood fiberboard factory bonded to polyisocyanurate or polystyrene …   Wiktionary

• Vermiculite — Infobox mineral name = Vermiculite category = boxwidth = boxbgcolor = caption = formula = (MgFe,Al)3(Al,Si)4O10(OH)2·4H2O color = Bronze Yellow habit = Clay, scaly, aggregate system = Monoclinic twinning = cleavage = Perfect fracture = Uneven… …   Wikipedia