Preparation of Sound‐Insulating Lightweight Ceramics from Aluminosilicate Rocks with High CaCO3 Content. Issue 7 (7th April 2015)

• Record Type: Journal Article
• Authors: Kazantseva, Lidia K.; Lygina, Talia Z.; Rashchenko, Sergey V.; Tsyplakov, Dmitry S.; Bullard, J.
• Is Part Of: Journal of the American Ceramic Society. Volume 98:Issue 7(2015)
• Page Start: 2047
• Page End: 2051
• Publication Date: 2015-04-07
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.13581
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace13581-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>A sound‐insulating lightweight ceramics with "pseudo‐open" porosity was obtained from calcite‐zeolite rock using energy‐saving procedure. A thorough analysis of chemical processes occurring during material preparation revealed that decomposition of CaCO₃ with extensive gas release destroys cellular structure of thermally softened material. The latter, however, can be overpassed by proper alkali activation, which leads to transformation of CaCO₃ into sodium carbonates (like trona and thermonatrite) with lower decomposition temperature. The reported results suggest that quality lightweight ceramics with sound‐insulating properties can be obtained even from poorly zeolitized rocks with high CaCO₃ content previously treated as unsuitable for such application.</p> </abstract>