Chapter 10. Effects of Nucleation and Crystallization on the Physical Properties of Gypsum Molds

  1. William M. Carty
  1. Qingxia Liu,
  2. Jeff Grussing and
  3. Kevin Mover

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294673.ch10

Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 22, Issue 2

Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 22, Issue 2

How to Cite

Liu, Q., Grussing, J. and Mover, K. (2001) Effects of Nucleation and Crystallization on the Physical Properties of Gypsum Molds, in Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 22, Issue 2 (ed W. M. Carty), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294673.ch10

Author Information

  1. Research and Technology Center, US Gypsum Company, Libertyville, Illinois

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2001

ISBN Information

Print ISBN: 9780470375723

Online ISBN: 9780470294673

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Keywords:

  • nucleation;
  • crystallization;
  • gypsum molds;
  • physical properties;
  • plaster of paris

Summary

Plaster of pans (calcium sulfate hemihydrate, CaSO4 0.5H2O) is widely used to produce gypsum molds for the dinnerware and sanitaryware industries. When mixed with water, the calcium sulfate hemihydrate is hydrated to calcium sulfate dihydrate (CaSO4 2H20) to form gypsum molds. In this paper, the nucleation and crystallization during the hydration of hemihydrate will be discussed. The effects of crystal modifiers on physical properties of gypsum mold will be described. The state of the art of gypsum molds in the dinnerware industry will be outlined.