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Preparation of Sound‐Insulating Lightweight Ceramics from Aluminosilicate Rocks with High CaCO 3 Content
Author(s) -
Kazantseva Lidia K.,
Lygina Talia Z.,
Rashchenko Sergey V.,
Tsyplakov Dmitry S.
Publication year - 2015
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13581
Subject(s) - aluminosilicate , calcite , porosity , materials science , ceramic , mineralogy , decomposition , alkali metal , sodium aluminosilicate , zeolite , composite material , chemical engineering , geology , chemistry , biochemistry , organic chemistry , engineering , catalysis
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 CaCO 3 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 CaCO 3 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 CaCO 3 content previously treated as unsuitable for such application.