Chapter 29. In-Situ Real Time Monitoring of the Polymerization in Gel-Cast Ceramic Processes

  1. John B. Wachtman Jr.
  1. S. Ahuja1,
  2. S. L. Dieckman1,
  3. G. A. Bostrom1,
  4. L. G. Waterfield1,
  5. A. C. Raptis1 and
  6. O. O. Omatetet2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314821.ch29

Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 17, Issue 3

Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 17, Issue 3

How to Cite

Ahuja, S., Dieckman, S. L., Bostrom, G. A., Waterfield, L. G., Raptis, A. C. and Omatetet, O. O. (1996) In-Situ Real Time Monitoring of the Polymerization in Gel-Cast Ceramic Processes, in Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 17, Issue 3 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314821.ch29

Author Information

  1. 1

    Energy Technology Division, Argonne National Laboratory, Argonne IL 60439-4825

  2. 2

    Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge TN

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1996

ISBN Information

Print ISBN: 9780470375426

Online ISBN: 9780470314821

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Keywords:

  • spectroscopy;
  • gelcasting;
  • polymerization;
  • intensities;
  • copolymerization

Summary

The method of gelcasting requires making a mixture of a slurry of ceramic powder in a solution of organic monomers and casting it in a mold. Gelcasting is different from injection molding in that it separates mold filling from setting during conversion of the ceramic slurry to a formed green part. In this work, nuclear magnetic resonance (NMR) spectroscopy and imaging has been used for in-situ monitoring of the gelation process and gelcasting of alumina. 1H NMR spectra and images are obtained during polymerization of a mixture of soluble reactive acrylamide monomers. Polymerization was initiated by adding an initiator and an accelerator to form long-chain, cross-linked polymers. Multidimensional NMR imaging was utilized for in-situ monitoring of the process and for verification of homogeneous polymerization. Comparison of the modeled intensities with acquired images shows a direct extraction of T1 data from the images.