Effect of kaolinitic clays from the State of Rio de Janeiro in the composition of whiteware floor tile bodies

Abstract

This work presents an investigation that was undertaken for three types of kaolinitic clays from the State of Rio de Janeiro, Brazil, with a potential use in whiteware floor tiles bodies. Different compositions prepared by mixing the three clays with other materials such as kaolin, quartz, philite, potash feldspar and talc, were investigated and compared with an industrial ceramic body for whiteware floor tiles (group BIIa). Physical and mechanical properties such as linear shrinkage, water absorption and flexural strength were evaluated in pressed specimens fired at temperatures varying from 1025 to 1225 ºC. The microstructure of the specimens was studied by X-ray diffraction, scanning electron microscopy and mercury porosimetry. The results indicated that the prepared compositions presented microstructural characteristics, specially the pore size distribution, and technological properties that are compatible with low-porosity ceramic tiles. However, they also display characteristics, such as an excessive plasticity and high loss on ignition, that could generate problems during the industrial processing.

Use of Brazilian Kaolin as a Potential Low-cost Adsorbent for the Removal of Malachite Green from Colored Effluents

“…Kaolin is a clay predominantly composed by kaolinite (Al 2 Si 2 O 5 (OH) 4 ) 25 , which has been widely used in a variety of technological applications [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] . Due to the low-cost and large availability, the use of clays like kaolin becomes the adsorption process an attractive and promising technology.…”

Effect of Barium Carbonate Addition on the Properties of Porcelain Ceramic Tile

“…This indicates that addition of barium carbonate up to 6 wt.% is acceptable as flux material for production of porcelain tiles. While base sample shows the highest bulk density value of 2.43 g/cm 3 , the lowest bulk density value was obtained in B10 sample containing 10 wt.% barium carbonate with maximum water absorption value. The density values of samples vary between 2.14-2.43 g/cm 3 .…”

“…While base sample shows the highest bulk density value of 2.43 g/cm 3 , the lowest bulk density value was obtained in B10 sample containing 10 wt.% barium carbonate with maximum water absorption value. The density values of samples vary between 2.14-2.43 g/cm 3 . Additionally, the appearant porosity was recorded %3 and %8 for samples B8 and B10 respectively.…”

“…The subject of numerous studies in the literature is generally based on the use of alternative materials such as clay materials [3], diopside [4], talc and albite as flux [5,6] etc. to fabricate porcelain tile.…”

Desenvolvimento de massas de revestimento cerâmico com argila caulinítica e nefelina sienito

“…Argilas cauliníticas não apresentam características satisfatórias para serem utilizadas como único componente de massa para revestimento cerâmico, devido principalmente ao seu comportamento refratário durante a queima [2,3]. Alguns trabalhos reportados na literatura mostraram que há necessidade da adição de fundentes às argilas cauliníticas de Campos dos Goytacazes para a obtenção de revestimento para pavimento [4][5][6].…”