A study of the sintering of diatomaceous earth to produce porous ceramic monolithswith bimodal porosity and high strength
2010 (English)In: Powder Technology, ISSN 0032-5910, E-ISSN 1873-328X, Vol. 201, 253-257 p.Article in journal (Refereed) Published
Diatomite powder, a naturally occurring porous raw material, was used to fabricate ceramic materials withbimodal porosity and high strength. The effect of the sintering temperature on the density and porosity ofdry pressed diatomite green bodies was evaluated using mercury porosimetry and water immersionmeasurements. It was found that the intrinsic porosity of the diatomite particles with a pore size around0.2 μm was lost at sintering temperatures above 1200 °C. Maintaining the sintering temperature at around1000 °C resulted in highly porous materials that also displayed a high compressive strength. Microstructuralstudies by scanning electron microscopy and energy-dispersive X-ray analysis suggested that the porecollapse was facilitated by the presence of low melting impurities like Na2O and K2O.
Place, publisher, year, edition, pages
Amsterdam, Netherlands: Elsevier B.V. , 2010. Vol. 201, 253-257 p.
Porous ceramics, diatomite, sintering, bimodal porosity
Research subject Materials Chemistry
IdentifiersURN: urn:nbn:se:su:diva-46702DOI: 10.1016/j.powtec.2010.04.004ISI: 000279157300007OAI: oai:DiVA.org:su-46702DiVA: diva2:372125
authorCount :32010-11-262010-11-242010-12-21Bibliographically approved