Chapter 6. Surface Morphology and Resistance to Stains of Porcelain Stoneware Tiles

  1. William M. Carty
  1. Leonardo Esposito,
  2. Carlo Palmonari and
  3. Antonella Tucci

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294734.ch6

Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 23, Issue 2

Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 23, Issue 2

How to Cite

Esposito, L., Palmonari, C. and Tucci, A. (2002) Surface Morphology and Resistance to Stains of Porcelain Stoneware Tiles, in Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 23, Issue 2 (ed W. M. Carty), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294734.ch6

Author Information

  1. Italian Ceramic Center, Bologna. Italy

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2002

ISBN Information

Print ISBN: 9780470375778

Online ISBN: 9780470294734

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Keywords:

  • surface morphology;
  • stains of porcelain stoneware tiles;
  • ceramics;
  • stain resistance;
  • machining-induced flaws

Summary

The aesthetics of characteristics of porcelain stoneware tiles can be improved considerably by polishing their working surface. As is well known, machining ceramics induces widespread damage due to material removal and thus decreases the mechanical characteristics and the stain resistance of the tile surface. The investigation carried out was directed toward studying the relationship between stain resistance, machining-induced flaws, and surface porosity caused by the removal of the surface layer. Different staining agents were put into contact with the working surface of several types of as-fired and industrially polished tiles. After cleaning the treated areas and the corresponding polished cross sections were thoroughly analyzed using microscopic techniques. It was found that the sensitivity to staining agents depends on the nature of the staining agent as well as on the microstructure and surface condition of the tile. Since a correct machining process is able to completely remove grinding-induced damage, samples of tiles under investigation were polished using a more careful laboratory polishing procedure. The same analyses carried out on the industrially polished tiles were also carried out on specimens from the laboratory polished tiles. The results showed that the stain resistance of the polished surface can be improved using a suitable machining procedure.