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A study of the sintering of diatomaceous earth to produce porous ceramic monoliths with bimodal porosity and high strength
Department of Materials and Environmental Chemistry, Stockholm University.ORCID iD: 0000-0003-4888-6237
Department of Metallurgical and Materials Engineering, University of Engineering and Technology, Lahore.
Department of Materials and Environmental Chemistry, Stockholm University.
2010 (English)In: Powder Technology, ISSN 0032-5910, E-ISSN 1873-328X, Vol. 201, no 3, p. 253-257Article in journal (Refereed) Published
Abstract [en]

Diatomite powder, a naturally occurring porous raw material, was used to fabricate ceramic materials with bimodal porosity and high strength. The effect of the sintering temperature on the density and porosity of dry pressed diatomite green bodies was evaluated using mercury porosimetry and water immersion measurements. It was found that the intrinsic porosity of the diatomite particles with a pore size around 0.2 µm was lost at sintering temperatures above 1200 °C. Maintaining the sintering temperature at around 1000 °C resulted in highly porous materials that also displayed a high compressive strength. Microstructural studies by scanning electron microscopy and energy-dispersive X-ray analysis suggested that the pore collapse was facilitated by the presence of low melting impurities like Na2O and K2O.

Place, publisher, year, edition, pages
2010. Vol. 201, no 3, p. 253-257
National Category
Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-13483DOI: 10.1016/j.powtec.2010.04.004Local ID: cb453e1c-e5b3-4fd8-8be7-7aea141fcba4OAI: oai:DiVA.org:ltu-13483DiVA, id: diva2:986436
Note
Upprättat; 2010; 20150416 (farakh)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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