Chapter 2. The Reevaluation of the Unity Molecular Formula Limits for Glazes

  1. Willam M. Carty
  1. Matthew Katz,
  2. Tina Gebhart and
  3. William Carty

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294796.ch2

Whitewares and Materials: Ceramic Engineering and Science Proceedings, Volume 24, Issue 2

Whitewares and Materials: Ceramic Engineering and Science Proceedings, Volume 24, Issue 2

How to Cite

Katz, M., Gebhart, T. and Carty, W. (2003) The Reevaluation of the Unity Molecular Formula Limits for Glazes, in Whitewares and Materials: Ceramic Engineering and Science Proceedings, Volume 24, Issue 2 (ed W. M. Carty), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294796.ch2

Author Information

  1. Whiteware Research Center, New York State College of Ceramics at Alfred University, Alfred, New York

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2003

ISBN Information

Print ISBN: 9780470375822

Online ISBN: 9780470294796

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Keywords:

  • compositions;
  • molecular;
  • intrinsic;
  • robust;
  • fluxes

Summary

Glass former levels in glaze compositions may be defined in a standard relationship based on the application of the unity molecular formula. The UMF approach allows for glaze surface quality prediction based on the ratio of glass formers (SiO2 and B2O3) and alumina to a normalized molar background of flux (R2O + RO). When mapped as a function of alumina and glass former, the compositions create strictly defined regions of gloss and matte glazes and can be used to indicate glass and glaze formation at specific temperatures. In this work, issues regarding boron incorporation into the UMF model and the specific role of boron are addressed.