THE EFFECT OF COMBINATION OF BORIC ACID AND LITHIUM CARBONATE ON SINTERING AND MICROSTRUCTURE IN SINGLE FIRING WALL TILE

Year 2019, Volume: 3 Issue: 2, 86 - 98, 30.04.2019

Savaş Elmas , İsmail Tarhan

https://doi.org/10.26900/jsp.3.010

Abstract

The
aim of this study was to determine the effect of boric acid and lithium
carbonate on microstructure and sintering characteristics of wall tile after
firing. Amount of Li2 (CO3) (0.1-0.3-0.6-0.9-1.2-4 wt.%)
were added in wall tile corresponding to each constant amount of added of H3BO3
(0.1-0.3-0.6-0.9-1.2-2 wt.%). All samples were fired in 1135 0C 35 minutes in
an industrial fast firing kiln. Dry strength, fired strength, water
absorption and colorimeter values of all samples were determined after firing.
Scanning electron microscope (SEM), x-ray diffraction (XRD) analysis, optical
dilatometer measurements were performed in order to determine the
microstructure and melting temperature for prescribed purpose
(1-2-7-8-11-32-37). Standard (1) and alternative (8) receipe’s thermogravimetric
and diferantial thermal analyses were performed. 37 (2% H3BO3 + 4% Li2 (CO3)
recipe’s sintering starting temperature was 984 0C. In the recipe 8 (0.3% H3BO3
+ 0.1% Li2(CO3) is an alternative to the standard wall tile, which can be used with
higher strength values. 

Keywords

Flux, Sintering, Microstructure, Boric acid, Litium carbonate, Wall tile

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