PROPERTIES of POROUS CERAMICS PRODUCED by SINTERING TERRA ROSSA-ALKALI MIXES

Year 2022, Issue: 049, 130 - 138, 30.06.2022

Canan Mercan Mehmet Uğur Toprak Eda Taşçı Musa Akman

Abstract

Porous ceramics were produced by sintering terra rossa (TR) with alkalis for void formation at 1000 °C. Little cylinders (25x25 mm) were prepared with TR to investigate the influence of alkali type (NaOH, Na2CO3 and KOH) and amount (8, 10 and 12% by weight of TR) on the physical, mechanical and microstructure of porous ceramics (PC). The highest compressive strength (32 MPa) was obtained in series with no alkalis. The addition of alkalis decreased the unit weight and compressive strength of PC due to decreased sintering temperature, increased foaming and excessive formation of glassy phase causing the brittle structure. The unit weight of the PC produced with NaOH and Na2CO3 was considerably low (0.62-0.70 g/cm3) compared with PC comprising KOH (1.05-2.16 g/cm3). Corresponding compressive strengths were 3.17-4.46 MPa and 7.68-25.87 MPa revealing that it can be used as a decorative alternative to clay brick and autoclaved aerated concrete blocks.

Keywords

Compressive strength, Porous ceramics, Sintering, Terra rossa

Supporting Institution

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

Thanks

The authors, gratefully, acknowledge Tulu Ceramics for sintering in an industrial furnace and the Center for Advanced Technologies (Kütahya Dumlupinar University) for their help in some measurements and analysis. This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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