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Morphological and chemical investigation of industrially expanded perlite

Abstract : New applications of expanded perlites in the building industry as thermal and acoustical insulating material actually demand a better comprehension of the perlite expansion phenomenon. Smaller and mechanically more stable particles are demanded and therefore the classical industrial expansion process needs to be optimised. In this study the morphological and chemical aspects of the expansion process are examined by microscope observations and x-ray analyses. The comparison of the analyses and morphology of the raw, expanded and unexpanded material shows the chemical and structural differences of the unexpanded production sinks. It also shows the unisothermal character of the expansion process, which starts at the particle surface or at fractures in the grain. The industrial expansion process should take into account these facts to get a better yield of expanded particles.
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Submitted on : Wednesday, January 13, 2016 - 11:41:22 AM
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  • HAL Id : hal-01255170, version 1



K. Zahringer, Victor Zymla, A. Zymla, J.P. Martin. Morphological and chemical investigation of industrially expanded perlite. Chemie der Erde / Geochemistry, Elsevier, 2001, 61 (1), pp.30-44. ⟨hal-01255170⟩



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