Preparation and Utilization of Fine Expanded Perlite

Kenichi Sodeyama; Yoshio Sakka

doi:10.4028/www.scientific.net/KEM.280-283.701

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 280-283Preparation and Utilization of Fine Expanded...

Preparation and Utilization of Fine Expanded Perlite

Abstract:

Hollow glass microspheres named expanded perlite have been prepared from perlite, but the size is usually above 20 µm. In the conventional preparation method, it is difficult to produce fine expanded perlite with particle size under 20 µm because the water contained in finely milled perlite particle, which is the origin of foaming, is evolved during heating process. A new fluidized sand-bedfurnace has developed and fine expanded perlite particles with particle size less than 15 µm and bulk density under 0.5 g/cm3 are prepared successfully. Using the fine expanded perlite, lightweight composites with alumina and lightweight pottery are successfully prepared by colloidal processing and subsequent heating.

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Key Engineering Materials (Volumes 280-283)

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701-706

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.280-283.701

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Online since:

February 2007

Authors:

Kenichi Sodeyama, Yoshio Sakka

Keywords:

Fluidized Bed Furnace, Hollow Microspher, Lightweight Composite, Perlite

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