Paper Title:
Clays from Southern Brazil: Physical, Chemical and Mineralogical Characterization
  Abstract

Fore knowledge of the characteristics of ceramic raw materials is of utmost importance during the development, processing and production stages of any ceramic product. This work describes the characterization of clays commonly used in the ceramics industry. Two different clays were selected: clay A, from Tubarão-SC and clay B, from Porto Alegre-RS. Their chemical composition was obtained by X-ray fluorescence and their mineralogy by X-ray diffraction, coupled with numerical rational analysis. Their thermal behaviour was studied by differential thermal analysis and thermogravimetry. Their particle size distribution and plasticity were also determined. Clay A showed circa 47.5 % quartz (by weight), 40.2 % kaolinite and 9.9 % muscovite mica. Clay B showed a high kaolinite content (circa 72 wt.%), accompanied by montmorillonite (circa 10 %) and potash feldspar (circa 10 % microcline). Clay B was found to be much more plastic than clay A, and both are suitable for pottery, tiles and brick making.

  Info
Periodical
Materials Science Forum (Volumes 498-499)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
447-452
DOI
10.4028/www.scientific.net/MSF.498-499.447
Citation
S. L. Correia, K.A.S. Curto, D. Hotza, A. M. Segadães, "Clays from Southern Brazil: Physical, Chemical and Mineralogical Characterization", Materials Science Forum, Vols. 498-499, pp. 447-452, 2005
Online since
November 2005
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Price
$32.00
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