Investigations on Properties of Sintered Ceramics out of Low-Melting Illite Clay and Additive of Fine-Dispersed Nepheline Syenite

Authors

  • Jolanta PRANCKEVIČIENĖ, Valdas BALKEVIČIUS, Alfonsas Algimantas ŠPOKAUSKAS VGTU Scientific Institute of Thermal Insulation

Keywords:

mineral wool centrifugation waste, low-melting illite clay, nepheline syenite, leucite, aegirine.

Abstract

The work deals with the ceramics obtained by burning of formative mixtures out of low-melting illite clay with additives
of mineral wool centrifugation waste (MWCF waste) and fine-dispersed nepheline syenite. For investigations, we used
milled nepheline syenite with specific surface of 8200 cm2/g. After burning of formative mixture with 25 % additive of
milled nepheline syenite at temperature of 1060 ºC, the sintered ceramics with water absorption of 2.52 % and density of
2097 kg/m3 was received. The temperature of local liquid phase origination was observed at 800 ºC. The ions K+ and
Na+ contained in nepheline syenite reacted with the compounds contained in clay and, at crystallization of reaction
products, leucite and aegirine formed.

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Published

2010-09-05

Issue

Vol. 16 No. 3 (2010)

Section

CERAMICS AND GLASSES

License

 

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