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Study of Structural and Technological Properties of Expanded Vermiculite During Preparation of High-Temperature Heat Insulation

Study of Structural and Technological Properties of Expanded Vermiculite During Preparation of... The effect of structure, mineralogical, and fractional composition of expanded vermiculite prepared from a concentrate with an irregular structure of phlogopite/vermiculite, as well as molding method on properties of ceramovermiculite, is studied. It is shown that material color may be an indicator of varying degrees of hydrophlogopite vermiculitization and dehydration. Heat treatment of vermiculite concentrate in production at a temperature of 1000°C is insufficient for this type of mica. With the use of refractory clay additives, samples of ceramovermiculite with density of 880 – 1120 kg/m3, compressive strength 0.54 – 0.91 MPa (semi-dry compaction) and a density of 530 – 620 kg/m3, compressive strength 0,21 – 0,45 MPa (plastic molding) are obtained. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

Study of Structural and Technological Properties of Expanded Vermiculite During Preparation of High-Temperature Heat Insulation

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References (21)

Publisher
Springer Journals
Copyright
Copyright © Springer Science+Business Media, LLC, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
1083-4877
eISSN
1573-9139
DOI
10.1007/s11148-022-00725-6
Publisher site
See Article on Publisher Site

Abstract

The effect of structure, mineralogical, and fractional composition of expanded vermiculite prepared from a concentrate with an irregular structure of phlogopite/vermiculite, as well as molding method on properties of ceramovermiculite, is studied. It is shown that material color may be an indicator of varying degrees of hydrophlogopite vermiculitization and dehydration. Heat treatment of vermiculite concentrate in production at a temperature of 1000°C is insufficient for this type of mica. With the use of refractory clay additives, samples of ceramovermiculite with density of 880 – 1120 kg/m3, compressive strength 0.54 – 0.91 MPa (semi-dry compaction) and a density of 530 – 620 kg/m3, compressive strength 0,21 – 0,45 MPa (plastic molding) are obtained.

Journal

Refractories and Industrial CeramicsSpringer Journals

Published: Sep 1, 2022

Keywords: ceramovermiculite; phlogopite; vermiculite; swelling; diffraction patterns; IR-spectra; elemental composition

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